diff --git a/Assets/Scripts/BuildingPlacement.cs b/Assets/Scripts/BuildingPlacement.cs
index f2643c4..07dc5cd 100644
--- a/Assets/Scripts/BuildingPlacement.cs
+++ b/Assets/Scripts/BuildingPlacement.cs
@@ -45,9 +45,35 @@ namespace Northbound
         // UI 체크 캐싱 (Input System 콜백 내에서 IsPointerOverGameObject() 사용 불가)
         private bool _isPointerOverUI = false;
 
+        // 플레이어 컨트롤러 참조 (로컬 플레이어 체크용)
+        private NetworkPlayerController _playerController;
+        private bool _isInitialized = false;
+
         public override void OnNetworkSpawn()
         {
-            if (!IsOwner) return;
+            _playerController = GetComponent<NetworkPlayerController>();
+
+            // 지연 초기화 - 다음 프레임에 체크
+            StartCoroutine(InitializeAfterOwnerSet());
+        }
+
+        private System.Collections.IEnumerator InitializeAfterOwnerSet()
+        {
+            // _ownerPlayerId가 설정될 때까지 대기 (최대 1초)
+            float timeout = 1f;
+            while (_playerController != null && _playerController.OwnerPlayerId == ulong.MaxValue && timeout > 0)
+            {
+                yield return null;
+                timeout -= Time.deltaTime;
+            }
+
+            // 로컬 플레이어인지 확인
+            if (_playerController == null || !_playerController.IsLocalPlayer)
+            {
+                yield break;
+            }
+
+            _isInitialized = true;
 
             _inputActions = new PlayerInputActions();
             _inputActions.Player.ToggleBuildMode.performed += OnToggleBuildMode;
@@ -118,7 +144,7 @@ namespace Northbound
 
         public override void OnNetworkDespawn()
         {
-            if (IsOwner && _inputActions != null)
+            if (_isInitialized && _inputActions != null)
             {
                 _inputActions.Player.ToggleBuildMode.performed -= OnToggleBuildMode;
                 _inputActions.Player.Rotate.performed -= OnRotate;
@@ -134,7 +160,7 @@ namespace Northbound
 
         private void Update()
         {
-            if (!IsOwner) return;
+            if (!_isInitialized) return;
 
             // UI 체크 캐싱 (Input System 콜백 내에서 사용하기 위해)
             _isPointerOverUI = CheckPointerOverUI();