diff --git a/app/Http/Controllers/API/GroupController.php b/app/Http/Controllers/API/GroupController.php
index d2e6941bf..41a3f23ec 100644
--- a/app/Http/Controllers/API/GroupController.php
+++ b/app/Http/Controllers/API/GroupController.php
@@ -1074,10 +1074,15 @@ public function updateGroupv2(Request $request, $idGroup): JsonResponse {
             'email' => $email,
         ];
 
+        // Hosts can edit the postcode (area stays admin/coordinator only, below).  Only touch it when sent, so a
+        // partial update doesn't blank it.
+        if ($request->has('postcode')) {
+            $data['postcode'] = $postcode;
+        }
+
         if ($user->hasRole('Administrator') || ($user->hasRole('NetworkCoordinator') && $isCoordinatorForGroup)) {
             // Got permission to update these.
             $data['area'] = $area;
-            $data['postcode'] = $postcode;
             $data['archived_at'] = $archived_at;
         }
 
@@ -1212,6 +1217,7 @@ private function validateGroupParams(Request $request, $create, ?Group $existing
                                    'location' => ['required', 'max:255'],
                                    'description' => ['required'],
                                    'website' => ['nullable', 'url', 'max:255'],
+                                   'postcode' => ['nullable', 'max:32'],
                                ]);
         } else {
             $request->validate([
@@ -1219,6 +1225,7 @@ private function validateGroupParams(Request $request, $create, ?Group $existing
                                    'location' => ['max:255'],
                                    'website' => ['nullable', 'url', 'max:255'],
                                    'archived_at' => ['nullable', 'date'],
+                                   'postcode' => ['nullable', 'max:32'],
                                ]);
         }
 
diff --git a/resources/js/components/GroupAddEdit.vue b/resources/js/components/GroupAddEdit.vue
index 686b33de5..fa87ffbda 100644
--- a/resources/js/components/GroupAddEdit.vue
+++ b/resources/js/components/GroupAddEdit.vue
@@ -53,7 +53,6 @@
           :lat.sync="lat"
           :lng.sync="lng"
           :postcode.sync="postcode"
-          :can-edit-postcode="canApprove"
           class="group-location"
           :has-error="$v.location.$error"
           ref="location"
diff --git a/resources/js/components/GroupLocation.vue b/resources/js/components/GroupLocation.vue
index 5d94e467b..9ddaa199e 100644
--- a/resources/js/components/GroupLocation.vue
+++ b/resources/js/components/GroupLocation.vue
@@ -24,7 +24,7 @@
     </b-form-group>
     <b-form-group>
       <label for="group_postcode">{{ __('groups.postcode') }}:</label>
-      <b-input id="group_postcode" name="postcode" v-model="currentPostcode" :class="{ hasError: hasError }" :readonly="!canEditPostcode" />
+      <b-input id="group_postcode" name="postcode" v-model="currentPostcode" maxlength="32" :class="{ hasError: hasError }" />
       <small>{{ __('groups.groups_postcode_small') }}</small>
     </b-form-group>
   </div>
@@ -77,11 +77,6 @@ export default {
       type: Boolean,
       required: false,
       default: false
-    },
-    canEditPostcode: {
-      type: Boolean,
-      required: false,
-      default: false
     }
   },
   components: {
diff --git a/tests/Feature/Groups/GroupEditTest.php b/tests/Feature/Groups/GroupEditTest.php
index 7534a6d6f..f02bc3d60 100644
--- a/tests/Feature/Groups/GroupEditTest.php
+++ b/tests/Feature/Groups/GroupEditTest.php
@@ -92,6 +92,39 @@ public function invalid_location(): void
         ]);
     }
 
+    /** @test */
+    public function host_can_edit_postcode_but_not_area(): void {
+        $group = Group::factory()->create(['postcode' => 'SW9 7QD', 'area' => 'London']);
+
+        $host = User::factory()->host()->create();
+        $group->addVolunteer($host);
+        $group->makeMemberAHost($host);
+        $this->actingAs($host);
+
+        $response = $this->patch('/api/v2/groups/' . $group->idgroups, [
+            'postcode' => 'E8 1AA',
+            'area' => 'Elsewhere',
+        ]);
+        $response->assertSuccessful();
+
+        $group->refresh();
+        $this->assertEquals('E8 1AA', $group->postcode);
+        $this->assertEquals('London', $group->area);
+
+        // A partial update that doesn't send the postcode leaves it alone.
+        $response = $this->patch('/api/v2/groups/' . $group->idgroups, [
+            'network_data' => ['foo' => 'bar'],
+        ]);
+        $response->assertSuccessful();
+        $this->assertEquals('E8 1AA', $group->refresh()->postcode);
+
+        // Longer than the column.
+        $this->expectException(\Illuminate\Validation\ValidationException::class);
+        $this->patch('/api/v2/groups/' . $group->idgroups, [
+            'postcode' => str_repeat('X', 33),
+        ]);
+    }
+
     /** @test */
     public function image_upload(): void {
         Storage::fake('avatars');