diff --git a/src/components/activity/ActivityAnchorForm.svelte b/src/components/activity/ActivityAnchorForm.svelte
index 91a506934f..a67c3b3836 100644
--- a/src/components/activity/ActivityAnchorForm.svelte
+++ b/src/components/activity/ActivityAnchorForm.svelte
@@ -2,6 +2,8 @@
 
 <script lang="ts">
   import { createEventDispatcher } from 'svelte';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
+  import { planReadOnly } from '../../stores/plan';
   import type { ActivityDirective, ActivityDirectiveId, ActivityDirectivesMap } from '../../types/activity';
   import type { DropdownOptions, SelectedDropdownOptionValue } from '../../types/dropdown';
   import { getTarget } from '../../utilities/generic';
@@ -24,7 +26,6 @@
 
   const dispatch = createEventDispatcher();
   const anchorTextDelimiter = ' - ';
-  const updatePermissionError: string = 'You do not have permission to update this anchor';
 
   let anchorableActivityDirectives: ActivityDirective[] = [];
   let anchoredActivity: ActivityDirective | null = null;
@@ -43,6 +44,9 @@
     value: anchorableActivity.id,
   }));
   $: startOffsetError = validateStartOffset(startOffsetString, activityDirective);
+  $: updatePermissionError = $planReadOnly
+    ? PlanStatusMessages.READ_ONLY
+    : 'You do not have permission to update this anchor';
 
   $: if (startOffset) {
     const offsetString = convertUsToDurationString(getIntervalInMs(startOffset) * 1000, true);
@@ -150,13 +154,13 @@
         </label>
         <SearchableDropdown
           {disabled}
-          {hasUpdatePermission}
+          hasUpdatePermission={hasUpdatePermission && !$planReadOnly}
           options={searchableOptions}
           placeholder="To Plan"
           searchPlaceholder="Search Directives"
           settingsIconTooltip="Set Anchor"
           selectedOptionValue={anchorId}
-          updatePermissionError="You do not have permission to update this anchor"
+          {updatePermissionError}
           on:selectOption={onSelectAnchor}
         />
       </Input>
@@ -177,7 +181,7 @@
             class:disabled
             role="none"
             use:permissionHandler={{
-              hasPermission: hasUpdatePermission,
+              hasPermission: hasUpdatePermission && !$planReadOnly,
               permissionError: updatePermissionError,
             }}
             on:click={onAnchorToStart}
@@ -190,7 +194,7 @@
             class:selected={!isAnchoredToStart}
             class:disabled
             use:permissionHandler={{
-              hasPermission: hasUpdatePermission,
+              hasPermission: hasUpdatePermission && !$planReadOnly,
               permissionError: updatePermissionError,
             }}
             on:click={onAnchorToEnd}
@@ -212,7 +216,7 @@
           {disabled}
           name="start-offset"
           use:permissionHandler={{
-            hasPermission: hasUpdatePermission,
+            hasPermission: hasUpdatePermission && !$planReadOnly,
             permissionError: updatePermissionError,
           }}
           bind:value={startOffsetString}
diff --git a/src/components/activity/ActivityDirectiveForm.svelte b/src/components/activity/ActivityDirectiveForm.svelte
index ee0aa130e8..ae81b22418 100644
--- a/src/components/activity/ActivityDirectiveForm.svelte
+++ b/src/components/activity/ActivityDirectiveForm.svelte
@@ -3,8 +3,9 @@
 <script lang="ts">
   import CheckIcon from '@nasa-jpl/stellar/icons/check.svg?component';
   import PenIcon from '@nasa-jpl/stellar/icons/pen.svg?component';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
   import { field } from '../../stores/form';
-  import { plan } from '../../stores/plan';
+  import { plan, planReadOnly } from '../../stores/plan';
   import type {
     ActivityDirective,
     ActivityDirectiveId,
@@ -51,8 +52,6 @@
   export let showHeader: boolean = true;
   export let user: User | null;
 
-  const updatePermissionError = 'You do not have permission to update this activity';
-
   let editingActivityName: boolean = false;
   let hasUpdatePermission: boolean = false;
   let numOfUserChanges: number = 0;
@@ -64,8 +63,12 @@
   let startTimeDoyField: FieldStore<string>;
 
   $: if (user !== null && $plan !== null) {
-    hasUpdatePermission = featurePermissions.activityDirective.canUpdate(user, $plan, activityDirective);
+    hasUpdatePermission =
+      featurePermissions.activityDirective.canUpdate(user, $plan, activityDirective) && !$planReadOnly;
   }
+  $: updatePermissionError = $planReadOnly
+    ? PlanStatusMessages.READ_ONLY
+    : 'You do not have permission to update this activity';
   $: highlightKeysMap = keyByBoolean(highlightKeys);
   $: activityType =
     (activityTypes ?? []).find(({ name: activityTypeName }) => activityDirective?.type === activityTypeName) ?? null;
diff --git a/src/components/activity/ActivityDirectivesTable.svelte b/src/components/activity/ActivityDirectivesTable.svelte
index 408e6ada49..47a95d4f21 100644
--- a/src/components/activity/ActivityDirectivesTable.svelte
+++ b/src/components/activity/ActivityDirectivesTable.svelte
@@ -18,6 +18,7 @@
   export let dataGrid: DataGrid<ActivityDirective> | undefined = undefined;
   export let plan: Plan | null;
   export let selectedActivityDirectiveId: ActivityDirectiveId | null = null;
+  export let planReadOnly: boolean = false;
   export let user: User | null;
 
   type CellRendererParams = {
@@ -30,7 +31,8 @@
   let hasDeletePermission: boolean = false;
   let isDeletingDirective: boolean = false;
 
-  $: hasDeletePermission = plan !== null ? featurePermissions.activityDirective.canDelete(user, plan) : false;
+  $: hasDeletePermission =
+    plan !== null ? featurePermissions.activityDirective.canDelete(user, plan) && !planReadOnly : false;
   $: {
     activityActionColumnDef = {
       cellClass: 'action-cell-container',
@@ -45,6 +47,7 @@
               placement: 'bottom',
             },
             hasDeletePermission,
+            planReadOnly,
             rowData: params.data,
           },
           target: actionsDiv,
@@ -96,6 +99,7 @@
   columnDefs={completeColumnDefs}
   {columnStates}
   {getRowId}
+  {planReadOnly}
   {hasDeletePermission}
   items={activityDirectives}
   pluralItemDisplayText="Activity Directives"
diff --git a/src/components/activity/ActivityDirectivesTablePanel.svelte b/src/components/activity/ActivityDirectivesTablePanel.svelte
index 3eb8d236da..c52012339f 100644
--- a/src/components/activity/ActivityDirectivesTablePanel.svelte
+++ b/src/components/activity/ActivityDirectivesTablePanel.svelte
@@ -10,7 +10,7 @@
     selectActivity,
     selectedActivityDirectiveId,
   } from '../../stores/activities';
-  import { plan } from '../../stores/plan';
+  import { plan, planReadOnly } from '../../stores/plan';
   import { spanUtilityMaps, spansMap } from '../../stores/simulation';
   import { view, viewTogglePanel, viewUpdateActivityDirectivesTable } from '../../stores/views';
   import type { ActivityDirective } from '../../types/activity';
@@ -318,6 +318,7 @@
       columnDefs={derivedColumnDefs ?? []}
       columnStates={activityDirectivesTable?.columnStates}
       plan={$plan}
+      planReadOnly={$planReadOnly}
       {user}
       on:columnStateChange={onColumnStateChange}
       on:selectionChanged={onSelectionChanged}
diff --git a/src/components/activity/ActivityFormPanel.svelte b/src/components/activity/ActivityFormPanel.svelte
index c8c5c249ff..f0c2e047a4 100644
--- a/src/components/activity/ActivityFormPanel.svelte
+++ b/src/components/activity/ActivityFormPanel.svelte
@@ -4,6 +4,7 @@
   import LockIcon from '@nasa-jpl/stellar/icons/lock.svg?component';
   import TrashIcon from '@nasa-jpl/stellar/icons/trash.svg?component';
   import UnlockIcon from '@nasa-jpl/stellar/icons/unlock.svg?component';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
   import {
     activityDirectivesMap,
     activityMetadataDefinitions,
@@ -11,7 +12,14 @@
     selectedActivityDirective,
   } from '../../stores/activities';
   import { filteredExpansionSequences } from '../../stores/expansion';
-  import { activityEditingLocked, activityTypes, modelId, plan, setActivityEditingLocked } from '../../stores/plan';
+  import {
+    activityEditingLocked,
+    activityTypes,
+    modelId,
+    plan,
+    planReadOnly,
+    setActivityEditingLocked,
+  } from '../../stores/plan';
   import { selectedSpan, simulationDatasetId, spanUtilityMaps, spansMap } from '../../stores/simulation';
   import { tags } from '../../stores/tags';
   import type { User } from '../../types/app';
@@ -30,12 +38,14 @@
   export let gridSection: ViewGridSection;
   export let user: User | null;
 
-  const deletePermissionError = 'You do not have permission to delete this activity';
-
   let hasDeletePermission: boolean = false;
 
+  $: deletePermissionError = $planReadOnly
+    ? PlanStatusMessages.READ_ONLY
+    : 'You do not have permission to delete this activity';
   $: if (user !== null && $plan !== null && $selectedActivityDirective !== null) {
-    hasDeletePermission = featurePermissions.activityDirective.canDelete(user, $plan, $selectedActivityDirective);
+    hasDeletePermission =
+      featurePermissions.activityDirective.canDelete(user, $plan, $selectedActivityDirective) && !$planReadOnly;
   }
 
   function onSelectSpan(event: CustomEvent<SpanId>) {
diff --git a/src/components/activity/ActivityPresetInput.svelte b/src/components/activity/ActivityPresetInput.svelte
index 93c16504ab..d2268c1c5e 100644
--- a/src/components/activity/ActivityPresetInput.svelte
+++ b/src/components/activity/ActivityPresetInput.svelte
@@ -2,6 +2,7 @@
 
 <script lang="ts">
   import { createEventDispatcher } from 'svelte';
+  import { planReadOnly } from '../../stores/plan';
   import { gqlSubscribable } from '../../stores/subscribable';
   import type { ActivityDirective, ActivityPreset } from '../../types/activity';
   import type { User } from '../../types/app';
@@ -54,14 +55,15 @@
     // because we also assign after preset creation, we must include both checks here as part of the creation permission check
     hasCreatePermission =
       featurePermissions.activityPresets.canCreate(user, plan) &&
-      featurePermissions.activityPresets.canAssign(user, plan);
+      featurePermissions.activityPresets.canAssign(user, plan) &&
+      !$planReadOnly;
 
     const selectedPreset = $activityPresets.find(
       activityPreset => activityPreset.id === activityDirective?.applied_preset?.preset_id,
     );
     if (selectedPreset !== undefined) {
-      hasDeletePermission = featurePermissions.activityPresets.canDelete(user, plan, selectedPreset);
-      hasUpdatePermission = featurePermissions.activityPresets.canUpdate(user, plan, selectedPreset);
+      hasDeletePermission = featurePermissions.activityPresets.canDelete(user, plan, selectedPreset) && !$planReadOnly;
+      hasUpdatePermission = featurePermissions.activityPresets.canUpdate(user, plan, selectedPreset) && !$planReadOnly;
     }
   }
 
@@ -100,6 +102,7 @@
         {options}
         optionLabel="preset"
         placeholder="None"
+        planReadOnly={$planReadOnly}
         selectedOptionValue={activityDirective?.applied_preset?.preset_id}
         showPlaceholderOption={hasAssignPermission}
         on:deleteOption={onDeletePreset}
diff --git a/src/components/activity/ActivityTypesPanel.svelte b/src/components/activity/ActivityTypesPanel.svelte
index 15fa755fd9..ab1aa385bd 100644
--- a/src/components/activity/ActivityTypesPanel.svelte
+++ b/src/components/activity/ActivityTypesPanel.svelte
@@ -2,7 +2,8 @@
 
 <script lang="ts">
   import PlusIcon from 'bootstrap-icons/icons/plus.svg?component';
-  import { activityTypes, plan } from '../../stores/plan';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
+  import { activityTypes, plan, planReadOnly } from '../../stores/plan';
   import type { ActivityType } from '../../types/activity';
   import type { User } from '../../types/app';
   import type { ViewGridSection } from '../../types/view';
@@ -16,13 +17,12 @@
   export let gridSection: ViewGridSection;
   export let user: User | null;
 
-  const permissionError = 'You do not have permission to add an activity.';
-
   let filterText: string = '';
   let hasPermission: boolean = false;
 
+  $: permissionError = $planReadOnly ? PlanStatusMessages.READ_ONLY : 'You do not have permission to add an activity.';
   $: if ($plan !== null) {
-    hasPermission = featurePermissions.activityDirective.canCreate(user, $plan);
+    hasPermission = featurePermissions.activityDirective.canCreate(user, $plan) && !$planReadOnly;
   }
   $: filteredActivityTypes = ($activityTypes ?? []).filter(({ name }) =>
     name.toLowerCase().includes(filterText.toLowerCase()),
diff --git a/src/components/constraints/ConstraintsPanel.svelte b/src/components/constraints/ConstraintsPanel.svelte
index 61d34ad7c1..4d8c97b7f1 100644
--- a/src/components/constraints/ConstraintsPanel.svelte
+++ b/src/components/constraints/ConstraintsPanel.svelte
@@ -8,6 +8,7 @@
   import PlanRightArrow from '@nasa-jpl/stellar/icons/plan_with_right_arrow.svg?component';
   import VisibleHideIcon from '@nasa-jpl/stellar/icons/visible_hide.svg?component';
   import VisibleShowIcon from '@nasa-jpl/stellar/icons/visible_show.svg?component';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
   import {
     checkConstraintsStatus,
     constraintResultMap,
@@ -18,7 +19,7 @@
     setConstraintVisibility,
   } from '../../stores/constraints';
   import { field } from '../../stores/form';
-  import { plan, viewTimeRange } from '../../stores/plan';
+  import { plan, planReadOnly, viewTimeRange } from '../../stores/plan';
   import type { User } from '../../types/app';
   import type { Constraint, ConstraintResult } from '../../types/constraint';
   import type { FieldStore } from '../../types/form';
@@ -168,8 +169,10 @@
           [
             permissionHandler,
             {
-              hasPermission: $plan ? featurePermissions.constraints.canCheck(user, $plan) : false,
-              permissionError: 'You do not have permission to run constraint checks',
+              hasPermission: $plan ? featurePermissions.constraints.canCheck(user, $plan) && !$planReadOnly : false,
+              permissionError: $planReadOnly
+                ? PlanStatusMessages.READ_ONLY
+                : 'You do not have permission to run constraint checks',
             },
           ],
         ]}
@@ -194,8 +197,10 @@
           name="new-constraint"
           class="st-button secondary"
           use:permissionHandler={{
-            hasPermission: $plan ? featurePermissions.constraints.canCreate(user, $plan) : false,
-            permissionError: 'You do not have permission to create constraints',
+            hasPermission: $plan ? featurePermissions.constraints.canCreate(user, $plan) && !$planReadOnly : false,
+            permissionError: $planReadOnly
+              ? PlanStatusMessages.READ_ONLY
+              : 'You do not have permission to create constraints',
           }}
           on:click={() => window.open(`${base}/constraints/new`, '_blank')}
         >
diff --git a/src/components/expansion/ExpansionPanel.svelte b/src/components/expansion/ExpansionPanel.svelte
index 2ed5fa5e83..f5bc391975 100644
--- a/src/components/expansion/ExpansionPanel.svelte
+++ b/src/components/expansion/ExpansionPanel.svelte
@@ -3,6 +3,7 @@
 <script lang="ts">
   import { base } from '$app/paths';
   import type { ICellRendererParams } from 'ag-grid-community';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
   import {
     creatingExpansionSequence,
     expansionSets,
@@ -10,7 +11,7 @@
     planExpansionStatus,
     selectedExpansionSetId,
   } from '../../stores/expansion';
-  import { plan } from '../../stores/plan';
+  import { plan, planReadOnly } from '../../stores/plan';
   import { simulationDatasetId } from '../../stores/simulation';
   import type { User } from '../../types/app';
   import type { DataGridColumnDef, RowId } from '../../types/data-grid';
@@ -69,9 +70,9 @@
   let selectedExpansionSet: ExpansionSet | null;
 
   $: if (user !== null && $plan !== null) {
-    hasCreatePermission = featurePermissions.expansionSequences.canCreate(user);
-    hasDeletePermission = featurePermissions.expansionSequences.canDelete(user, $plan);
-    hasExpandPermission = featurePermissions.expansionSequences.canExpand(user, $plan);
+    hasCreatePermission = featurePermissions.expansionSequences.canCreate(user) && !$planReadOnly;
+    hasDeletePermission = featurePermissions.expansionSequences.canDelete(user, $plan) && !$planReadOnly;
+    hasExpandPermission = featurePermissions.expansionSequences.canExpand(user, $plan) && !$planReadOnly;
   }
   $: {
     columnDefs = [
@@ -148,7 +149,9 @@
             permissionHandler,
             {
               hasPermission: hasExpandPermission,
-              permissionError: 'You do not have permission to expand sequences',
+              permissionError: $planReadOnly
+                ? PlanStatusMessages.READ_ONLY
+                : 'You do not have permission to expand sequences',
             },
           ],
         ]}
@@ -247,7 +250,9 @@
                     class="st-input"
                     use:permissionHandler={{
                       hasPermission: hasCreatePermission,
-                      permissionError: 'You do not have permission to create an expansion',
+                      permissionError: $planReadOnly
+                        ? PlanStatusMessages.READ_ONLY
+                        : 'You do not have permission to create an expansion',
                     }}
                   />
                   <button
@@ -255,7 +260,9 @@
                     disabled={!createButtonEnabled}
                     use:permissionHandler={{
                       hasPermission: hasCreatePermission,
-                      permissionError: 'You do not have permission to create an expansion',
+                      permissionError: $planReadOnly
+                        ? PlanStatusMessages.READ_ONLY
+                        : 'You do not have permission to create an expansion',
                     }}
                     on:click|stopPropagation={() =>
                       effects.createExpansionSequence(seqIdInput, $simulationDatasetId, user)}
diff --git a/src/components/menus/PlanMenu.svelte b/src/components/menus/PlanMenu.svelte
index 52839fdb31..a011bc7e76 100644
--- a/src/components/menus/PlanMenu.svelte
+++ b/src/components/menus/PlanMenu.svelte
@@ -5,6 +5,8 @@
   import { base } from '$app/paths';
   import BranchIcon from '@nasa-jpl/stellar/icons/branch.svg?component';
   import ChevronDownIcon from '@nasa-jpl/stellar/icons/chevron_down.svg?component';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
+  import { planReadOnly } from '../../stores/plan';
   import { viewTogglePanel } from '../../stores/views';
   import type { User } from '../../types/app';
   import type { Plan } from '../../types/plan';
@@ -19,10 +21,14 @@
   export let plan: Plan;
   export let user: User | null;
 
-  let hasCreatePermission: boolean = false;
+  let hasCreateMergeRequestPermission: boolean = false;
+  let hasCreatPlanBranchPermission: boolean = false;
+  let hasCreateSnapshotPermission: boolean = false;
   let planMenu: Menu;
 
-  $: hasCreatePermission = featurePermissions.planBranch.canCreateRequest(user, plan);
+  $: hasCreateMergeRequestPermission = featurePermissions.planBranch.canCreateRequest(user, plan) && !$planReadOnly;
+  $: hasCreatPlanBranchPermission = featurePermissions.planBranch.canCreateBranch(user) && !$planReadOnly;
+  $: hasCreateSnapshotPermission = featurePermissions.planSnapshot.canCreate(user, plan) && !$planReadOnly;
 
   function createMergePlanBranchRequest() {
     effects.createPlanBranchRequest(plan, 'merge', user);
@@ -60,7 +66,20 @@
   <div class="plan-menu st-typography-medium" role="none" on:click|stopPropagation={() => planMenu.toggle()}>
     <div class="plan-title">{plan.name}<ChevronDownIcon /></div>
     <Menu bind:this={planMenu}>
-      <MenuItem on:click={createPlanBranch}>
+      <MenuItem
+        use={[
+          [
+            permissionHandler,
+            {
+              hasPermission: hasCreateMergeRequestPermission,
+              permissionError: $planReadOnly
+                ? PlanStatusMessages.READ_ONLY
+                : 'You do not have permission to create a merge request',
+            },
+          ],
+        ]}
+        on:click={createPlanBranch}
+      >
         <div class="column-name">Create branch</div>
       </MenuItem>
       <MenuItem on:click={showPlanMergeRequests}>
@@ -74,8 +93,10 @@
             [
               permissionHandler,
               {
-                hasPermission: hasCreatePermission,
-                permissionError: 'You do not have permission to create a merge request',
+                hasPermission: hasCreatPlanBranchPermission,
+                permissionError: $planReadOnly
+                  ? PlanStatusMessages.READ_ONLY
+                  : 'You do not have permission to create a plan branch',
               },
             ],
           ]}
@@ -87,7 +108,20 @@
         </MenuItem>
       {/if}
       <MenuDivider />
-      <MenuItem on:click={createPlanSnapshot}>
+      <MenuItem
+        on:click={createPlanSnapshot}
+        use={[
+          [
+            permissionHandler,
+            {
+              hasPermission: hasCreateSnapshotPermission,
+              permissionError: $planReadOnly
+                ? PlanStatusMessages.READ_ONLY
+                : 'You do not have permission to create a plan snapshot',
+            },
+          ],
+        ]}
+      >
         <div class="column-name">Take Snapshot</div>
       </MenuItem>
       <MenuItem on:click={viewSnapshotHistory}>
diff --git a/src/components/modals/PlanMergeRequestsModal.svelte b/src/components/modals/PlanMergeRequestsModal.svelte
index 2114404d0d..e44d0be013 100644
--- a/src/components/modals/PlanMergeRequestsModal.svelte
+++ b/src/components/modals/PlanMergeRequestsModal.svelte
@@ -4,7 +4,8 @@
   import { goto } from '$app/navigation';
   import { base } from '$app/paths';
   import { createEventDispatcher } from 'svelte';
-  import { planMergeRequestsIncoming, planMergeRequestsOutgoing } from '../../stores/plan';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
+  import { planMergeRequestsIncoming, planMergeRequestsOutgoing, planReadOnly } from '../../stores/plan';
   import type { User } from '../../types/app';
   import type { PlanMergeRequest, PlanMergeRequestStatus, PlanMergeRequestTypeFilter } from '../../types/plan';
   import effects from '../../utilities/effects';
@@ -189,10 +190,12 @@
                     on:click={() => onReviewOrWithdraw(planMergeRequest)}
                     class="st-button secondary"
                     use:permissionHandler={{
-                      hasPermission: hasPermission(planMergeRequest),
-                      permissionError: `You do not have permission to ${
-                        planMergeRequest.type === 'outgoing' ? 'withdraw' : 'review'
-                      } this request`,
+                      hasPermission: hasPermission(planMergeRequest) && !$planReadOnly,
+                      permissionError: $planReadOnly
+                        ? PlanStatusMessages.READ_ONLY
+                        : `You do not have permission to ${
+                            planMergeRequest.type === 'outgoing' ? 'withdraw' : 'review'
+                          } this request`,
                     }}
                   >
                     {#if planMergeRequest.pending}
diff --git a/src/components/plan/PlanForm.svelte b/src/components/plan/PlanForm.svelte
index b9615510a6..2e23825502 100644
--- a/src/components/plan/PlanForm.svelte
+++ b/src/components/plan/PlanForm.svelte
@@ -1,7 +1,9 @@
 <svelte:options immutable={true} />
 
 <script lang="ts">
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
   import { SearchParameters } from '../../enums/searchParameters';
+  import { planReadOnly } from '../../stores/plan';
   import { planSnapshotId, planSnapshotsWithSimulations } from '../../stores/planSnapshots';
   import { simulationDataset, simulationDatasetId } from '../../stores/simulation';
   import { viewTogglePanel } from '../../stores/views';
@@ -30,13 +32,15 @@
   let hasPermission: boolean = false;
   let filteredPlanSnapshots: PlanSnapshotType[] = [];
   let isFilteredBySimulation: boolean = false;
-  let permissionError = 'You do not have permission to edit this plan.';
+  let hasPlanUpdatePermission: boolean = false;
+
+  $: permissionError = $planReadOnly ? PlanStatusMessages.READ_ONLY : 'You do not have permission to edit this plan.';
 
   $: {
     if (plan && user) {
-      hasPermission = featurePermissions.plan.canUpdate(user, plan);
+      hasPlanUpdatePermission = featurePermissions.plan.canUpdate(user, plan) && !$planReadOnly;
     } else {
-      hasPermission = false;
+      hasPlanUpdatePermission = false;
     }
   }
 
@@ -157,7 +161,7 @@
               [
                 permissionHandler,
                 {
-                  hasPermission,
+                  hasPermission: hasPlanUpdatePermission,
                   permissionError,
                 },
               ],
@@ -181,7 +185,14 @@
               on:toggle={onToggleFilter}
             />
           {/if}
-          <button class="st-button secondary" on:click={onCreatePlanSnapshot}>Take Snapshot</button>
+          <button
+            class="st-button secondary"
+            use:permissionHandler={{
+              hasPermission: !$planReadOnly,
+              permissionError: PlanStatusMessages.READ_ONLY,
+            }}
+            on:click={onCreatePlanSnapshot}>Take Snapshot</button
+          >
         </div>
         <div style="margin-top: 8px">
           <CardList>
diff --git a/src/components/scheduling/SchedulingConditionsPanel.svelte b/src/components/scheduling/SchedulingConditionsPanel.svelte
index 2965f63bc3..9be581310b 100644
--- a/src/components/scheduling/SchedulingConditionsPanel.svelte
+++ b/src/components/scheduling/SchedulingConditionsPanel.svelte
@@ -3,7 +3,8 @@
 <script lang="ts">
   import { base } from '$app/paths';
   import { afterUpdate, beforeUpdate } from 'svelte';
-  import { plan } from '../../stores/plan';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
+  import { plan, planReadOnly } from '../../stores/plan';
   import { schedulingSpecConditions, selectedSpecId } from '../../stores/scheduling';
   import type { User } from '../../types/app';
   import type { SchedulingSpecCondition } from '../../types/scheduling';
@@ -26,9 +27,9 @@
   let filteredSchedulingSpecConditions: SchedulingSpecCondition[] = [];
 
   $: if ($plan) {
-    hasCreatePermission = featurePermissions.schedulingConditions.canCreate(user, $plan);
-    hasDeletePermission = featurePermissions.schedulingConditions.canDelete(user, $plan);
-    hasEditPermission = featurePermissions.schedulingConditions.canUpdate(user, $plan);
+    hasCreatePermission = featurePermissions.schedulingConditions.canCreate(user, $plan) && !$planReadOnly;
+    hasDeletePermission = featurePermissions.schedulingConditions.canDelete(user, $plan) && !$planReadOnly;
+    hasEditPermission = featurePermissions.schedulingConditions.canUpdate(user, $plan) && !$planReadOnly;
   }
 
   $: filteredSchedulingSpecConditions = $schedulingSpecConditions.filter(spec => {
@@ -72,7 +73,9 @@
           )}
         use:permissionHandler={{
           hasPermission: hasCreatePermission,
-          permissionError: 'You do not have permission to create scheduling conditions for this plan.',
+          permissionError: $planReadOnly
+            ? PlanStatusMessages.READ_ONLY
+            : 'You do not have permission to create scheduling conditions for this plan.',
         }}
       >
         New
@@ -89,6 +92,9 @@
             {hasDeletePermission}
             {hasEditPermission}
             specificationId={specCondition.specification_id}
+            permissionError={$planReadOnly
+              ? PlanStatusMessages.READ_ONLY
+              : 'You do not have permission to edit scheduling conditions for this plan.'}
             {user}
           />
         {/each}
diff --git a/src/components/scheduling/SchedulingGoalsPanel.svelte b/src/components/scheduling/SchedulingGoalsPanel.svelte
index 18e99797be..77db2b47f1 100644
--- a/src/components/scheduling/SchedulingGoalsPanel.svelte
+++ b/src/components/scheduling/SchedulingGoalsPanel.svelte
@@ -4,7 +4,8 @@
   import { base } from '$app/paths';
   import ChecklistIcon from '@nasa-jpl/stellar/icons/checklist.svg?component';
   import { afterUpdate, beforeUpdate } from 'svelte';
-  import { plan } from '../../stores/plan';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
+  import { plan, planReadOnly } from '../../stores/plan';
   import { enableScheduling, schedulingSpecGoals, schedulingStatus, selectedSpecId } from '../../stores/scheduling';
   import type { User } from '../../types/app';
   import type { SchedulingSpecGoal } from '../../types/scheduling';
@@ -37,13 +38,13 @@
     return includesName;
   });
 
-  $: hasAnalyzePermission = featurePermissions.schedulingGoals.canAnalyze(user);
+  $: hasAnalyzePermission = featurePermissions.schedulingGoals.canAnalyze(user) && !$planReadOnly;
   $: if ($plan) {
-    hasCreatePermission = featurePermissions.schedulingGoals.canCreate(user, $plan);
-    hasDeletePermission = featurePermissions.schedulingGoals.canDelete(user, $plan);
-    hasGoalEditPermission = featurePermissions.schedulingGoals.canUpdate(user, $plan);
-    hasSpecEditPermission = featurePermissions.schedulingGoals.canUpdateSpecification(user, $plan);
-    hasRunPermission = featurePermissions.schedulingGoals.canRun(user, $plan);
+    hasCreatePermission = featurePermissions.schedulingGoals.canCreate(user, $plan) && !$planReadOnly;
+    hasDeletePermission = featurePermissions.schedulingGoals.canDelete(user, $plan) && !$planReadOnly;
+    hasGoalEditPermission = featurePermissions.schedulingGoals.canUpdate(user, $plan) && !$planReadOnly;
+    hasSpecEditPermission = featurePermissions.schedulingGoals.canUpdateSpecification(user, $plan) && !$planReadOnly;
+    hasRunPermission = featurePermissions.schedulingGoals.canRun(user, $plan) && !$planReadOnly;
   }
 
   // Manually keep focus as scheduling goal elements are re-ordered.
@@ -73,7 +74,9 @@
             permissionHandler,
             {
               hasPermission: hasAnalyzePermission,
-              permissionError: 'You do not have permission to run a scheduling analysis',
+              permissionError: $planReadOnly
+                ? PlanStatusMessages.READ_ONLY
+                : 'You do not have permission to run a scheduling analysis',
             },
           ],
         ]}
@@ -89,7 +92,9 @@
             permissionHandler,
             {
               hasPermission: hasRunPermission,
-              permissionError: 'You do not have permission to run scheduling',
+              permissionError: $planReadOnly
+                ? PlanStatusMessages.READ_ONLY
+                : 'You do not have permission to run scheduling',
             },
           ],
         ]}
@@ -108,7 +113,9 @@
         class="st-button secondary"
         use:permissionHandler={{
           hasPermission: hasCreatePermission,
-          permissionError: 'You do not have permission to create scheduling goals for this plan.',
+          permissionError: $planReadOnly
+            ? PlanStatusMessages.READ_ONLY
+            : 'You do not have permission to create scheduling goals for this plan.',
         }}
         on:click={() =>
           window.open(`${base}/scheduling/goals/new?modelId=${$plan?.model.id}&&specId=${$selectedSpecId}`, '_blank')}
@@ -131,6 +138,9 @@
             simulateAfter={specGoal.simulate_after}
             specificationId={specGoal.specification_id}
             {user}
+            permissionError={$planReadOnly
+              ? PlanStatusMessages.READ_ONLY
+              : 'You do not have permission to edit scheduling goals for this plan.'}
           />
         {/each}
       {/if}
diff --git a/src/components/scheduling/conditions/SchedulingCondition.svelte b/src/components/scheduling/conditions/SchedulingCondition.svelte
index 1f97ff11c5..f6fac95227 100644
--- a/src/components/scheduling/conditions/SchedulingCondition.svelte
+++ b/src/components/scheduling/conditions/SchedulingCondition.svelte
@@ -15,10 +15,9 @@
   export let condition: SchedulingCondition;
   export let hasDeletePermission: boolean = false;
   export let hasEditPermission: boolean = false;
+  export let permissionError: string = '';
   export let specificationId: number;
   export let user: User | null;
-
-  const permissionError = 'You do not have permission to edit scheduling conditions for this plan.';
 </script>
 
 <div class="scheduling-condition" class:disabled={!enabled}>
diff --git a/src/components/scheduling/goals/SchedulingGoal.svelte b/src/components/scheduling/goals/SchedulingGoal.svelte
index 9dce1543d2..cdcbe2b7c3 100644
--- a/src/components/scheduling/goals/SchedulingGoal.svelte
+++ b/src/components/scheduling/goals/SchedulingGoal.svelte
@@ -25,14 +25,13 @@
   export let hasGoalEditPermission: boolean = false;
   export let hasSpecEditPermission: boolean = false;
   export let hasDeletePermission: boolean = false;
+  export let permissionError: string = '';
 
   $: upButtonHidden = priority <= 0;
   $: simulateGoal = simulateAfter; // Copied to local var to reflect changed values immediately in the UI
 
   let schedulingGoalInput: HTMLInputElement;
 
-  const permissionError = 'You do not have permission to edit scheduling goals for this plan.';
-
   function focusInput() {
     if (document.activeElement !== schedulingGoalInput) {
       schedulingGoalInput.focus();
diff --git a/src/components/simulation/SimulationPanel.svelte b/src/components/simulation/SimulationPanel.svelte
index b675dd08a9..e997c89b7f 100644
--- a/src/components/simulation/SimulationPanel.svelte
+++ b/src/components/simulation/SimulationPanel.svelte
@@ -4,9 +4,10 @@
   import PlanLeftArrow from '@nasa-jpl/stellar/icons/plan_with_left_arrow.svg?component';
   import PlanRightArrow from '@nasa-jpl/stellar/icons/plan_with_right_arrow.svg?component';
   import { SearchParameters } from '../../enums/searchParameters';
-  import { field } from '../../stores/form';
-  import { plan, planEndTimeMs, planStartTimeMs } from '../../stores/plan';
   import { planSnapshot } from '../../stores/planSnapshots';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
+  import { field } from '../../stores/form';
+  import { plan, planEndTimeMs, planReadOnly, planStartTimeMs } from '../../stores/plan';
   import {
     enableSimulation,
     simulation,
@@ -65,8 +66,8 @@
   let filteredSimulationDatasets: SimulationDataset[] = [];
 
   $: if (user !== null && $plan !== null) {
-    hasRunPermission = featurePermissions.simulation.canRun(user, $plan);
-    hasUpdatePermission = featurePermissions.simulation.canUpdate(user, $plan);
+    hasRunPermission = featurePermissions.simulation.canRun(user, $plan) && !$planReadOnly;
+    hasUpdatePermission = featurePermissions.simulation.canUpdate(user, $plan) && !$planReadOnly;
   }
   $: if ($plan) {
     startTimeDoy =
@@ -279,7 +280,9 @@
             permissionHandler,
             {
               hasPermission: hasRunPermission,
-              permissionError: 'You do not have permission to run a simulation',
+              permissionError: $planReadOnly
+                ? PlanStatusMessages.READ_ONLY
+                : 'You do not have permission to run a simulation',
             },
           ],
         ]}
@@ -301,7 +304,7 @@
               permissionHandler,
               {
                 hasPermission: hasUpdatePermission,
-                permissionError: updatePermissionError,
+                permissionError: $planReadOnly ? PlanStatusMessages.READ_ONLY : updatePermissionError,
               },
             ],
           ]}
@@ -322,7 +325,7 @@
               permissionHandler,
               {
                 hasPermission: hasUpdatePermission,
-                permissionError: updatePermissionError,
+                permissionError: $planReadOnly ? PlanStatusMessages.READ_ONLY : updatePermissionError,
               },
             ],
           ]}
@@ -359,7 +362,7 @@
                 permissionHandler,
                 {
                   hasPermission: hasUpdatePermission,
-                  permissionError: updatePermissionError,
+                  permissionError: $planReadOnly ? PlanStatusMessages.READ_ONLY : updatePermissionError,
                 },
               ],
             ]}
diff --git a/src/components/simulation/SimulationTemplateInput.svelte b/src/components/simulation/SimulationTemplateInput.svelte
index 95900e3676..cd83cc5a9f 100644
--- a/src/components/simulation/SimulationTemplateInput.svelte
+++ b/src/components/simulation/SimulationTemplateInput.svelte
@@ -2,6 +2,7 @@
 
 <script lang="ts">
   import { createEventDispatcher } from 'svelte';
+  import { planReadOnly } from '../../stores/plan';
   import { simulationTemplates } from '../../stores/simulation';
   import type { User } from '../../types/app';
   import type {
@@ -36,18 +37,21 @@
     value: simulationTemplate.id,
   }));
   $: if (plan !== null) {
-    hasAssignPermission = featurePermissions.simulationTemplates.canAssign(user, plan);
+    hasAssignPermission = featurePermissions.simulationTemplates.canAssign(user, plan) && !$planReadOnly;
     // because we also assign after template creation, we must include both checks here as part of the creation permission check
     hasCreatePermission =
       featurePermissions.simulationTemplates.canCreate(user, plan) &&
-      featurePermissions.simulationTemplates.canAssign(user, plan);
+      featurePermissions.simulationTemplates.canAssign(user, plan) &&
+      !$planReadOnly;
 
     const selectedTemplate = $simulationTemplates.find(
       simulationTemplate => simulationTemplate.id === selectedSimulationTemplate?.id,
     );
     if (selectedTemplate !== undefined) {
-      hasDeletePermission = featurePermissions.simulationTemplates.canDelete(user, plan, selectedTemplate);
-      hasUpdatePermission = featurePermissions.simulationTemplates.canUpdate(user, plan, selectedTemplate);
+      hasDeletePermission =
+        featurePermissions.simulationTemplates.canDelete(user, plan, selectedTemplate) && !$planReadOnly;
+      hasUpdatePermission =
+        featurePermissions.simulationTemplates.canUpdate(user, plan, selectedTemplate) && !$planReadOnly;
     }
   }
 
@@ -88,6 +92,7 @@
       {options}
       optionLabel="template"
       placeholder="None"
+      planReadOnly={$planReadOnly}
       selectedOptionValue={selectedSimulationTemplate?.id}
       showPlaceholderOption={hasAssignPermission}
       on:deleteOption={onDeleteTemplate}
diff --git a/src/components/timeline/TimelineContextMenu.svelte b/src/components/timeline/TimelineContextMenu.svelte
index 77a3705a2c..61c02e27db 100644
--- a/src/components/timeline/TimelineContextMenu.svelte
+++ b/src/components/timeline/TimelineContextMenu.svelte
@@ -3,6 +3,8 @@
 <script lang="ts">
   import type { ScaleTime } from 'd3-scale';
   import { createEventDispatcher } from 'svelte';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
+  import { planReadOnly } from '../../stores/plan';
   import { view, viewUpdateGrid } from '../../stores/views';
   import type { ActivityDirective, ActivityDirectivesMap } from '../../types/activity';
   import type { User } from '../../types/app';
@@ -148,8 +150,10 @@
         [
           permissionHandler,
           {
-            hasPermission: hasUpdateSimulationPermission,
-            permissionError: 'You do not have permission to update this simulation',
+            hasPermission: hasUpdateSimulationPermission && !$planReadOnly,
+            permissionError: $planReadOnly
+              ? PlanStatusMessages.READ_ONLY
+              : 'You do not have permission to update this simulation',
           },
         ],
       ]}
@@ -162,8 +166,10 @@
         [
           permissionHandler,
           {
-            hasPermission: hasUpdateSimulationPermission,
-            permissionError: 'You do not have permission to update this simulation',
+            hasPermission: hasUpdateSimulationPermission && !$planReadOnly,
+            permissionError: $planReadOnly
+              ? PlanStatusMessages.READ_ONLY
+              : 'You do not have permission to update this simulation',
           },
         ],
       ]}
@@ -181,8 +187,10 @@
         [
           permissionHandler,
           {
-            hasPermission: hasUpdateDirectivePermission,
-            permissionError: 'You do not have permission to delete this activity',
+            hasPermission: hasUpdateDirectivePermission && !$planReadOnly,
+            permissionError: $planReadOnly
+              ? PlanStatusMessages.READ_ONLY
+              : 'You do not have permission to delete this activity',
           },
         ],
       ]}
@@ -229,8 +237,10 @@
         [
           permissionHandler,
           {
-            hasPermission: hasUpdateSimulationPermission,
-            permissionError: 'You do not have permission to update the simulation',
+            hasPermission: hasUpdateSimulationPermission && !$planReadOnly,
+            permissionError: $planReadOnly
+              ? PlanStatusMessages.READ_ONLY
+              : 'You do not have permission to update the simulation',
           },
         ],
       ]}
@@ -243,8 +253,10 @@
         [
           permissionHandler,
           {
-            hasPermission: hasUpdateSimulationPermission,
-            permissionError: 'You do not have permission to update the simulation',
+            hasPermission: hasUpdateSimulationPermission && !$planReadOnly,
+            permissionError: $planReadOnly
+              ? PlanStatusMessages.READ_ONLY
+              : 'You do not have permission to update the simulation',
           },
         ],
       ]}
diff --git a/src/components/timeline/TimelineLockControl.svelte b/src/components/timeline/TimelineLockControl.svelte
index a6db6657e7..8d1a28a725 100644
--- a/src/components/timeline/TimelineLockControl.svelte
+++ b/src/components/timeline/TimelineLockControl.svelte
@@ -2,12 +2,14 @@
   import LockIcon from '@nasa-jpl/stellar/icons/lock.svg?component';
   import UnlockIcon from '@nasa-jpl/stellar/icons/unlock.svg?component';
   import { createEventDispatcher, onMount } from 'svelte';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
   import { permissionHandler } from '../../utilities/permissionHandler';
   import { TimelineLockStatus } from '../../utilities/timeline';
   import { tooltip } from '../../utilities/tooltip';
 
   export let hasUpdatePermission: boolean = false;
   export let timelineLockStatus: TimelineLockStatus = TimelineLockStatus.Locked;
+  export let planReadOnly: boolean = false;
 
   const dispatch = createEventDispatcher();
   const lockTooltipContent = 'Click to unlock timeline, or press and hold the Shift key to temporarily unlock';
@@ -63,7 +65,7 @@
   use:tooltip={{ content: lockTooltipContent, disabled: tooltipDisabled || !hasUpdatePermission, placement: 'bottom' }}
   use:permissionHandler={{
     hasPermission: hasUpdatePermission,
-    permissionError: 'You do not have permission to update this timeline',
+    permissionError: planReadOnly ? PlanStatusMessages.READ_ONLY : 'You do not have permission to update this timeline',
   }}
 >
   {#if timelineLockStatus === TimelineLockStatus.Locked}
diff --git a/src/components/timeline/TimelinePanel.svelte b/src/components/timeline/TimelinePanel.svelte
index 66b0253466..c9098cba49 100644
--- a/src/components/timeline/TimelinePanel.svelte
+++ b/src/components/timeline/TimelinePanel.svelte
@@ -8,7 +8,7 @@
     selectedActivityDirectiveId,
   } from '../../stores/activities';
   import { visibleConstraintResults } from '../../stores/constraints';
-  import { maxTimeRange, plan, planId, viewTimeRange } from '../../stores/plan';
+  import { maxTimeRange, plan, planId, planReadOnly, viewTimeRange } from '../../stores/plan';
   import {
     resourcesByViewLayerId,
     selectedSpanId,
@@ -38,8 +38,8 @@
   let timelineDirectiveVisibilityToggles: DirectiveVisibilityToggleMap = {};
 
   $: if (user !== null && $plan !== null) {
-    hasUpdateDirectivePermission = featurePermissions.activityDirective.canUpdate(user, $plan);
-    hasUpdateSimulationPermission = featurePermissions.simulation.canUpdate(user, $plan);
+    hasUpdateDirectivePermission = featurePermissions.activityDirective.canUpdate(user, $plan) && !$planReadOnly;
+    hasUpdateSimulationPermission = featurePermissions.simulation.canUpdate(user, $plan) && !$planReadOnly;
   }
   $: timeline = $view?.definition.plan.timelines.find(timeline => timeline.id === timelineId);
   $: timelineDirectiveVisibilityToggles = timeline
@@ -134,6 +134,7 @@
         />
         <TimelineLockControl
           hasUpdatePermission={hasUpdateDirectivePermission}
+          planReadOnly={$planReadOnly}
           timelineLockStatus={$timelineLockStatus}
           on:lock={({ detail: lock }) => {
             $timelineLockStatus = lock;
diff --git a/src/components/ui/DataGrid/BulkActionDataGrid.svelte b/src/components/ui/DataGrid/BulkActionDataGrid.svelte
index f8200fb5a3..895e2cbb4e 100644
--- a/src/components/ui/DataGrid/BulkActionDataGrid.svelte
+++ b/src/components/ui/DataGrid/BulkActionDataGrid.svelte
@@ -11,6 +11,7 @@
   import type { ColDef, ColumnState, IRowNode, RedrawRowsParams } from 'ag-grid-community';
   import { keyBy } from 'lodash-es';
   import { createEventDispatcher, onDestroy, type ComponentEvents } from 'svelte';
+  import { PlanStatusMessages } from '../../../enums/planStatusMessages';
   import type { User } from '../../../types/app';
   import type { RowId, TRowData } from '../../../types/data-grid';
   import type { PermissionCheck } from '../../../types/permissions';
@@ -25,6 +26,7 @@
   export let columnStates: ColumnState[] = [];
   export let dataGrid: DataGrid<RowData> | undefined = undefined;
   export let hasDeletePermission: PermissionCheck<RowData> | boolean = true;
+  export let planReadOnly: boolean = false;
   export let idKey: keyof RowData = 'id';
   export let items: RowData[];
   export let pluralItemDisplayText: string = '';
@@ -50,12 +52,12 @@
     const selectedItem = items.find(item => item.id === selectedItemId) ?? null;
     if (selectedItem) {
       if (typeof hasDeletePermission === 'function') {
-        deletePermission = hasDeletePermission(user, selectedItem);
+        deletePermission = hasDeletePermission(user, selectedItem) && !planReadOnly;
       }
     }
   }
   $: if (typeof hasDeletePermission === 'boolean') {
-    deletePermission = hasDeletePermission;
+    deletePermission = hasDeletePermission && !planReadOnly;
   }
   $: if (selectedItemId != null && !selectedItemIds.includes(selectedItemId)) {
     selectedItemIds = [selectedItemId];
@@ -156,7 +158,7 @@
               permissionHandler,
               {
                 hasPermission: deletePermission,
-                permissionError: 'You do not have permission to delete.',
+                permissionError: planReadOnly ? PlanStatusMessages.READ_ONLY : 'You do not have permission to delete.',
               },
             ],
           ]}
diff --git a/src/components/ui/DataGrid/DataGridActions.svelte b/src/components/ui/DataGrid/DataGridActions.svelte
index cafb6b1bed..2d2c865c31 100644
--- a/src/components/ui/DataGrid/DataGridActions.svelte
+++ b/src/components/ui/DataGrid/DataGridActions.svelte
@@ -1,6 +1,8 @@
 <svelte:options immutable={true} />
 
 <script lang="ts">
+  import { PlanStatusMessages } from '../../../enums/planStatusMessages';
+
   import { permissionHandler } from '../../../utilities/permissionHandler';
 
   import DownloadIcon from '@nasa-jpl/stellar/icons/download.svg?component';
@@ -24,6 +26,7 @@
   export let downloadTooltip: Tooltip | undefined = undefined;
   export let hasDeletePermission: boolean = true;
   export let hasEditPermission: boolean = true;
+  export let planReadOnly: boolean = false;
   export let viewTooltip: Tooltip | undefined = undefined;
 
   export let editCallback: ((data: RowData) => void) | undefined = undefined;
@@ -69,7 +72,9 @@
     use:tooltip={hasEditPermission ? editTooltip : undefined}
     use:permissionHandler={{
       hasPermission: hasEditPermission,
-      permissionError: `You do not have permission to ${editTooltip?.content ?? 'edit'}.`,
+      permissionError: planReadOnly
+        ? PlanStatusMessages.READ_ONLY
+        : `You do not have permission to ${editTooltip?.content ?? 'edit'}.`,
     }}
   >
     <PenIcon />
@@ -86,7 +91,9 @@
     use:tooltip={hasDeletePermission ? deleteTooltip : undefined}
     use:permissionHandler={{
       hasPermission: hasDeletePermission,
-      permissionError: `You do not have permission to ${deleteTooltip?.content ?? 'delete'}.`,
+      permissionError: planReadOnly
+        ? PlanStatusMessages.READ_ONLY
+        : `You do not have permission to ${deleteTooltip?.content ?? 'delete'}.`,
     }}
   >
     <TrashIcon />
diff --git a/src/components/ui/EditableDropdown.svelte b/src/components/ui/EditableDropdown.svelte
index e84ce64e90..33efbb1390 100644
--- a/src/components/ui/EditableDropdown.svelte
+++ b/src/components/ui/EditableDropdown.svelte
@@ -6,6 +6,7 @@
   import TrashIcon from '@nasa-jpl/stellar/icons/trash.svg?component';
   import { upperFirst } from 'lodash-es';
   import { createEventDispatcher } from 'svelte';
+  import { PlanStatusMessages } from '../../enums/planStatusMessages';
   import type { DropdownOption, DropdownOptions, SelectedDropdownOptionValue } from '../../types/dropdown';
   import { getTarget } from '../../utilities/generic';
   import { permissionHandler } from '../../utilities/permissionHandler';
@@ -22,6 +23,7 @@
   export let options: DropdownOptions = [];
   export let optionLabel: string = 'Option';
   export let placeholder: string = '';
+  export let planReadOnly: boolean = false;
   export let selectedOptionValue: SelectedDropdownOptionValue | undefined = undefined;
   export let showPlaceholderOption: boolean = true;
   export let searchPlaceholder: string = `Search ${upperFirst(optionLabel)}s`;
@@ -155,7 +157,9 @@
         class:disabled={!optionName || !isOptionNameChanged || isOptionNameDuped}
         use:permissionHandler={{
           hasPermission: hasCreatePermission,
-          permissionError: `You do not have permission to save a new ${upperFirst(optionLabel)}`,
+          permissionError: planReadOnly
+            ? PlanStatusMessages.READ_ONLY
+            : `You do not have permission to save a new ${upperFirst(optionLabel)}`,
         }}
         on:click|stopPropagation={onSaveNewOption}
       >
@@ -168,7 +172,9 @@
         disabled={!(!!selectedOption && (isOptionNameChanged || canSaveOver))}
         use:permissionHandler={{
           hasPermission: updatePermission,
-          permissionError: `You do not have permission to save this ${upperFirst(optionLabel)}`,
+          permissionError: planReadOnly
+            ? PlanStatusMessages.READ_ONLY
+            : `You do not have permission to save this ${upperFirst(optionLabel)}`,
         }}
         on:click|stopPropagation={onSaveOption}
       >
@@ -180,7 +186,9 @@
         disabled={!selectedOption || isOptionNameChanged}
         use:permissionHandler={{
           hasPermission: deletePermission,
-          permissionError: `You do not have permission to delete this ${upperFirst(optionLabel)}`,
+          permissionError: planReadOnly
+            ? PlanStatusMessages.READ_ONLY
+            : `You do not have permission to delete this ${upperFirst(optionLabel)}`,
         }}
         on:click|stopPropagation={onDeleteOption}
       >
diff --git a/src/enums/planStatusMessages.ts b/src/enums/planStatusMessages.ts
new file mode 100644
index 0000000000..19580d6d3d
--- /dev/null
+++ b/src/enums/planStatusMessages.ts
@@ -0,0 +1,3 @@
+export enum PlanStatusMessages {
+  READ_ONLY = 'This plan is read only.',
+}
diff --git a/src/routes/plans/[id]/+page.svelte b/src/routes/plans/[id]/+page.svelte
index e7fad0d6d2..96efe847e0 100644
--- a/src/routes/plans/[id]/+page.svelte
+++ b/src/routes/plans/[id]/+page.svelte
@@ -23,6 +23,7 @@
   import CssGrid from '../../../components/ui/CssGrid.svelte';
   import PlanGrid from '../../../components/ui/PlanGrid.svelte';
   import ProgressLinear from '../../../components/ui/ProgressLinear.svelte';
+  import { PlanStatusMessages } from '../../../enums/planStatusMessages';
   import { SearchParameters } from '../../../enums/searchParameters';
   import {
     activityDirectives,
@@ -48,6 +49,7 @@
     planEndTimeMs,
     planId,
     planLocked,
+    planReadOnly,
     planStartTimeMs,
     planTags,
     resetPlanStores,
@@ -128,10 +130,10 @@
   $: hasCreateViewPermission = featurePermissions.view.canCreate(data.user);
   $: hasUpdateViewPermission = $view !== null ? featurePermissions.view.canUpdate(data.user, $view) : false;
   $: if ($plan) {
-    hasCheckConstraintsPermission = featurePermissions.constraints.canCheck(data.user, $plan);
-    hasExpandPermission = featurePermissions.expansionSequences.canExpand(data.user, $plan);
-    hasScheduleAnalysisPermission = featurePermissions.schedulingGoals.canAnalyze(data.user);
-    hasSimulatePermission = featurePermissions.simulation.canRun(data.user, $plan);
+    hasCheckConstraintsPermission = featurePermissions.constraints.canCheck(data.user, $plan) && !$planReadOnly;
+    hasExpandPermission = featurePermissions.expansionSequences.canExpand(data.user, $plan) && !$planReadOnly;
+    hasScheduleAnalysisPermission = featurePermissions.schedulingGoals.canAnalyze(data.user) && !$planReadOnly;
+    hasSimulatePermission = featurePermissions.simulation.canRun(data.user, $plan) && !$planReadOnly;
   }
   $: if (data.initialPlan) {
     $plan = data.initialPlan;
@@ -377,7 +379,9 @@
         title={!compactNavMode ? 'Expansion' : ''}
         buttonText="Expand Activities"
         hasPermission={hasExpandPermission}
-        permissionError="You do not have permission to expand activities"
+        permissionError={$planReadOnly
+          ? PlanStatusMessages.READ_ONLY
+          : 'You do not have permission to expand activities'}
         menuTitle="Expansion Status"
         disabled={$selectedExpansionSetId === null}
         status={$planExpansionStatus}
@@ -400,7 +404,9 @@
           ? 'Simulation up-to-date'
           : ''}
         hasPermission={hasSimulatePermission}
-        permissionError="You do not have permission to run a simulation"
+        permissionError={$planReadOnly
+          ? PlanStatusMessages.READ_ONLY
+          : 'You do not have permission to run a simulation'}
         status={$simulationStatus}
         progress={$simulationProgress}
         disabled={!$enableSimulation}
@@ -453,7 +459,9 @@
         menuTitle="Constraint Status"
         buttonText="Check Constraints"
         hasPermission={hasCheckConstraintsPermission}
-        permissionError="You do not have permission to run a constraint check"
+        permissionError={$planReadOnly
+          ? PlanStatusMessages.READ_ONLY
+          : 'You do not have permission to run a constraint check'}
         status={$checkConstraintsStatus}
         on:click={() => effects.checkConstraints(data.user)}
       >
@@ -468,7 +476,9 @@
         buttonText="Analyze Goal Satisfaction"
         disabled={!$enableScheduling}
         hasPermission={hasScheduleAnalysisPermission}
-        permissionError="You do not have permission to run a scheduling analysis"
+        permissionError={$planReadOnly
+          ? PlanStatusMessages.READ_ONLY
+          : 'You do not have permission to run a scheduling analysis'}
         status={schedulingAnalysisStatus}
         statusText={schedulingAnalysisStatus === Status.PartialSuccess || schedulingAnalysisStatus === Status.Complete
           ? `${$satisfiedSchedulingGoalCount} satisfied, ${
diff --git a/src/stores/plan.ts b/src/stores/plan.ts
index 049ab5150d..b7e78bdd55 100644
--- a/src/stores/plan.ts
+++ b/src/stores/plan.ts
@@ -11,6 +11,8 @@ import { gqlSubscribable } from './subscribable';
 
 export const activityEditingLocked: Writable<boolean> = writable(false);
 
+export const planReadOnly: Writable<boolean> = writable(true);
+
 export const creatingModel: Writable<boolean> = writable(false);
 
 export const createModelError: Writable<string | null> = writable(null);