3 files changed, 22 insertions, 14 deletions
diff --git a/src/newgrf_commons.cpp b/src/newgrf_commons.cpp
index 5291bbac9..9e796aa60 100644
--- a/src/newgrf_commons.cpp
+++ b/src/newgrf_commons.cpp
@@ -165,3 +165,13 @@ uint32 GetTerrainType(TileIndex tile)
 	}
 }
 
+TileIndex GetNearbyTile(byte parameter, TileIndex tile)
+{
+	int8 x = GB(parameter, 0, 4);
+	int8 y = GB(parameter, 4, 4);
+
+	if (x >= 8) x -= 16;
+	if (y >= 8) y -= 16;
+
+	return tile + TileDiffXY(x, y);
+}
diff --git a/src/newgrf_commons.h b/src/newgrf_commons.h
index 070fb1feb..a7c00e65c 100644
--- a/src/newgrf_commons.h
+++ b/src/newgrf_commons.h
@@ -67,5 +67,6 @@ public:
 extern HouseOverrideManager _house_mngr;
 
 uint32 GetTerrainType(TileIndex tile);
+TileIndex GetNearbyTile(byte parameter, TileIndex tile);
 
 #endif /* NEWGRF_COMMONS_H */
diff --git a/src/newgrf_house.cpp b/src/newgrf_house.cpp
index b36628c2a..d5d68e844 100644
--- a/src/newgrf_house.cpp
+++ b/src/newgrf_house.cpp
@@ -178,6 +178,16 @@ static uint32 GetGRFParameter(HouseID house_id, byte parameter)
 	return file->param[parameter];
 }
 
+uint32 GetNearbyTileInformation(byte parameter, TileIndex tile)
+{
+	uint32 tile_type;
+
+	tile = GetNearbyTile(parameter, tile);
+	tile_type = GetTerrainType(tile) << 2 | (IsTileType(tile, MP_WATER) ? 1 : 0) << 1;
+
+	return GetTileType(tile) << 24 | (TileHeight(tile) * 8) << 16 | tile_type << 8 | GetTileSlope(tile, NULL);
+}
+
 /**
  * HouseGetVariable():
  *
@@ -229,20 +239,7 @@ static uint32 HouseGetVariable(const ResolverObject *object, byte variable, byte
 		}
 
 		/* Land info for nearby tiles. */
-		case 0x62: {
-			int8 x = GB(parameter, 0, 4);
-			int8 y = GB(parameter, 4, 4);
-			byte tile_type;
-
-			if (x >= 8) x -= 16;
-			if (y >= 8) y -= 16;
-
-			tile += TileDiffXY(x, y);
-
-			tile_type = GetTerrainType(tile) << 2 | (IsTileType(tile, MP_WATER) ? 1 : 0) << 1;
-
-			return GetTileType(tile) << 24 | (TileHeight(tile) * 8) << 16 | tile_type << 8 | GetTileSlope(tile, NULL);
-		}
+		case 0x62: return GetNearbyTileInformation(parameter, tile);
 
 		/* Read GRF parameter */
 		case 0x7F: return GetGRFParameter(object->u.house.house_id, parameter);