diff --git a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/APC.asset b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/APC.asset
index 5476344d44..0d0740c51c 100644
--- a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/APC.asset
+++ b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/APC.asset
@@ -12,7 +12,6 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 4584c35d672b8a74797cc5efa123ce16, type: 3}
   m_Name: APC
   m_EditorClassIdentifier: 
-  nameString: apc
   prefab: {fileID: 5287103069661579500, guid: 4c966398d6624164c910cd29c1faa980, type: 3}
   icon: {fileID: 0}
   layer: 6
@@ -20,3 +19,4 @@ MonoBehaviour:
   specificType: 0
   width: 1
   height: 1
+  isLarge: 1
diff --git a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/AirAlarm.asset b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/AirAlarm.asset
index 1b36d1d026..fe5058a940 100644
--- a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/AirAlarm.asset
+++ b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/AirAlarm.asset
@@ -12,7 +12,6 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 4584c35d672b8a74797cc5efa123ce16, type: 3}
   m_Name: AirAlarm
   m_EditorClassIdentifier: 
-  nameString: airalarm
   prefab: {fileID: 6961426338783081091, guid: 11a2276338ebc64429dfc565b491e437, type: 3}
   icon: {fileID: 0}
   layer: 6
@@ -20,3 +19,4 @@ MonoBehaviour:
   specificType: 0
   width: 1
   height: 1
+  isLarge: 1
diff --git a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/FireAlarm.asset b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/FireAlarm.asset
index 006b03b1b9..9051037301 100644
--- a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/FireAlarm.asset
+++ b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/FireAlarm.asset
@@ -12,7 +12,6 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 4584c35d672b8a74797cc5efa123ce16, type: 3}
   m_Name: FireAlarm
   m_EditorClassIdentifier: 
-  nameString: firealarm
   prefab: {fileID: 4866668043303595546, guid: 50dd6be959d44844ab1abf8a3f2adb01, type: 3}
   icon: {fileID: 0}
   layer: 6
@@ -20,3 +19,4 @@ MonoBehaviour:
   specificType: 0
   width: 1
   height: 1
+  isLarge: 1
diff --git a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Mirror.asset b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Mirror.asset
index 910b90e72b..3e5bef2a7a 100644
--- a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Mirror.asset
+++ b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Mirror.asset
@@ -12,7 +12,6 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 4584c35d672b8a74797cc5efa123ce16, type: 3}
   m_Name: Mirror
   m_EditorClassIdentifier: 
-  nameString: mirror
   prefab: {fileID: 4866668043303595546, guid: a777a6da30f0704478e25312963a8151, type: 3}
   icon: {fileID: 21300000, guid: 9e89894392ee65f45bd559d4619cbade, type: 3}
   layer: 6
@@ -20,3 +19,4 @@ MonoBehaviour:
   specificType: 0
   width: 1
   height: 1
+  isLarge: 1
diff --git a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Posters/PosterHorizontal.asset b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Posters/PosterHorizontal.asset
index c1d69c2fdc..412a2ed4af 100644
--- a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Posters/PosterHorizontal.asset
+++ b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Posters/PosterHorizontal.asset
@@ -12,7 +12,6 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 4584c35d672b8a74797cc5efa123ce16, type: 3}
   m_Name: PosterHorizontal
   m_EditorClassIdentifier: 
-  nameString: poster_horizontal
   prefab: {fileID: 5161561551087789900, guid: fdaaabc96a55d824a86a3636906240c1, type: 3}
   icon: {fileID: 0}
   layer: 6
@@ -20,3 +19,4 @@ MonoBehaviour:
   specificType: 0
   width: 1
   height: 1
+  isLarge: 1
diff --git a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Posters/PosterVertical.asset b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Posters/PosterVertical.asset
index ca6b61f86c..472dda647e 100644
--- a/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Posters/PosterVertical.asset
+++ b/Assets/Content/Data/TileMap/Resources/Structures/WallMounts/Posters/PosterVertical.asset
@@ -12,7 +12,6 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 4584c35d672b8a74797cc5efa123ce16, type: 3}
   m_Name: PosterVertical
   m_EditorClassIdentifier: 
-  nameString: poster_vertical
   prefab: {fileID: 5927714388255546572, guid: 0d6ab6288624c7348bdcbfb81d07088f, type: 3}
   icon: {fileID: 0}
   layer: 6
@@ -20,3 +19,4 @@ MonoBehaviour:
   specificType: 0
   width: 1
   height: 1
+  isLarge: 1
diff --git a/Assets/Scripts/SS3D/Systems/Tile/BuildChecker.cs b/Assets/Scripts/SS3D/Systems/Tile/BuildChecker.cs
index 547b75468c..d2e3f54a96 100644
--- a/Assets/Scripts/SS3D/Systems/Tile/BuildChecker.cs
+++ b/Assets/Scripts/SS3D/Systems/Tile/BuildChecker.cs
@@ -47,6 +47,10 @@ public static bool CanBuild(ITileLocation[] tileLocations, TileObjectSo tileObje
                 case TileLayer.WallMountHigh when canBuild:
                 case TileLayer.WallMountLow when canBuild:
                 {
+                    // If a wall mount is large, check to see if there are other large wall mounts
+                    canBuild &= !(tileObjectSo.isLarge && !tileLocations[(int)placedLayer].IsEmpty(TileHelper.GetNextCardinalDir(dir)));
+                    canBuild &= !(tileObjectSo.isLarge && !tileLocations[(int)placedLayer].IsEmpty(TileHelper.GetPreviousCardinalDir(dir)));
+
                     canBuild &= CanBuildWallAttachment((SingleTileLocation) tileLocations[(int)TileLayer.Turf],
                         tileObjectSo, dir, adjacentObjects);
                     break;
diff --git a/Assets/Scripts/SS3D/Systems/Tile/SO/TileObjectSo.cs b/Assets/Scripts/SS3D/Systems/Tile/SO/TileObjectSo.cs
index a0278916a6..0bf6d57337 100644
--- a/Assets/Scripts/SS3D/Systems/Tile/SO/TileObjectSo.cs
+++ b/Assets/Scripts/SS3D/Systems/Tile/SO/TileObjectSo.cs
@@ -21,6 +21,9 @@ public class TileObjectSo : GenericObjectSo
         public int width = 1;
         public int height = 1;
 
+        // Whether or not a wall mount is large
+        public bool isLarge;
+
         /// <summary>
         /// TODO : document and understand properly this method. Why the diagonal directions are not treated ?
         /// </summary>