diff --git a/libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/spaces/SpaceService.kt b/libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/spaces/SpaceService.kt
index 927bec13e1..39ea699ae3 100644
--- a/libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/spaces/SpaceService.kt
+++ b/libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/spaces/SpaceService.kt
@@ -23,6 +23,14 @@ interface SpaceService {
 
     fun getLeaveSpaceHandle(spaceId: RoomId): LeaveSpaceHandle
 
+    /**
+     * Add a child room to a space.
+     * @param spaceId The space ID to which the child will be added.
+     * @param childId The room ID of the child to add.
+     * @return A result indicating success or failure.
+     */
+    suspend fun addChildToSpace(spaceId: RoomId, childId: RoomId): Result<Unit>
+
     /**
      * Remove a child room from a space.
      * @param spaceId The space ID from which to remove the child.
diff --git a/libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/spaces/RustSpaceService.kt b/libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/spaces/RustSpaceService.kt
index 2ce184484c..771da5a3d5 100644
--- a/libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/spaces/RustSpaceService.kt
+++ b/libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/spaces/RustSpaceService.kt
@@ -98,6 +98,12 @@ class RustSpaceService(
         }
     }
 
+    override suspend fun addChildToSpace(spaceId: RoomId, childId: RoomId): Result<Unit> = withContext(sessionDispatcher) {
+        runCatchingExceptions {
+            innerSpaceService.addChildToSpace(childId = childId.value, spaceId = spaceId.value)
+        }
+    }
+
     override suspend fun removeChildFromSpace(spaceId: RoomId, childId: RoomId): Result<Unit> = withContext(sessionDispatcher) {
         runCatchingExceptions {
             innerSpaceService.removeChildFromSpace(childId = childId.value, spaceId = spaceId.value)
diff --git a/libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/spaces/FakeSpaceService.kt b/libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/spaces/FakeSpaceService.kt
index 0cd9907db3..2db83b601a 100644
--- a/libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/spaces/FakeSpaceService.kt
+++ b/libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/spaces/FakeSpaceService.kt
@@ -23,6 +23,7 @@ class FakeSpaceService(
     private val joinedSpacesResult: () -> Result<List<SpaceRoom>> = { lambdaError() },
     private val spaceRoomListResult: (RoomId) -> SpaceRoomList = { lambdaError() },
     private val leaveSpaceHandleResult: (RoomId) -> LeaveSpaceHandle = { lambdaError() },
+    private val addChildToSpaceResult: (RoomId, RoomId) -> Result<Unit> = { _, _ -> lambdaError() },
     private val removeChildFromSpaceResult: (RoomId, RoomId) -> Result<Unit> = { _, _ -> lambdaError() },
     private val joinedParentsResult: (RoomId) -> Result<List<SpaceRoom>> = { lambdaError() },
     private val getSpaceRoomResult: (RoomId) -> SpaceRoom? = { lambdaError() },
@@ -55,6 +56,10 @@ class FakeSpaceService(
         return leaveSpaceHandleResult(spaceId)
     }
 
+    override suspend fun addChildToSpace(spaceId: RoomId, childId: RoomId): Result<Unit> = simulateLongTask {
+        addChildToSpaceResult(spaceId, childId)
+    }
+
     override suspend fun removeChildFromSpace(spaceId: RoomId, childId: RoomId): Result<Unit> = simulateLongTask {
         removeChildFromSpaceResult(spaceId, childId)
     }