diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c2b616..921b610 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ### Change Log for Node-RED Worldmap
 
+ - v1.1.13 - Add ability to set a building using a GeoJSON Feature set. {name:"MyTower":building:{...feature sets...}}
  - v1.1.12 - README changes, split out CHANGELOG.md
  - v1.1.11 - fix websocket multiple connections
  - v1.1.9 - add ability to add geoJSON layers
diff --git a/README.md b/README.md
index 070b956..4f23f18 100644
--- a/README.md
+++ b/README.md
@@ -65,6 +65,43 @@ There are also several special icons...
  - **unknown** : pseudo NATO style yellow square.
  - **earthquake** : black circle - diameter proportional to `msg.mag`.
 
+### Buildings
+
+The OSM Buildings layer is available in the layers menu. You can replace this with a building of your own by
+sending a msg.payload containing a name and a building property. The building property should be
+a GeoJSON Feature Collection as per the OSMBuildings spec.
+
+    { name:"My Block", building: {
+        "type": "FeatureCollection",
+        "features": [
+          {
+            "type": "Feature",
+            "properties": {
+              "wallColor": "rgb(0,0,255)",
+              "roofColor": "rgb(128,128,255)",
+              "height": 50,
+              "minHeight": 0,
+              "piso": 0
+            },
+            "geometry": {
+              "type": "Polygon",
+              "coordinates": [
+                [
+                  [-1.398163, 51.026591],
+                  [-1.397781, 51.026597],
+                  [-1.397751, 51.025430],
+                  [-1.398148, 51.025427],
+                  [-1.398163, 51.026591]
+                ]
+              ]
+            }
+          }
+        ] }
+    }
+
+**Note**: the object you supply will replace the whole buildings layer. To delete the building send a msg with a name and the building property set to ""  (blank string).
+
+
 ### Areas and Lines
 
 If the payload contains an **area** property - that is an array of co-ordinates, e.g.
diff --git a/package.json b/package.json
index 6cf3236..aa0b8a7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "node-red-contrib-web-worldmap",
-    "version": "1.1.12",
+    "version": "1.1.13",
     "description": "A Node-RED node to provide a web page of a world map for plotting things on.",
     "dependencies": {
         "express": "^4.16.3",
diff --git a/worldmap/index.html b/worldmap/index.html
index 2a21a0b..2e31458 100644
--- a/worldmap/index.html
+++ b/worldmap/index.html
@@ -743,6 +743,19 @@ function setMarker(data) {
     opt.clickable = (data.hasOwnProperty("clickable")) ? data.clickable : false;
     opt.fill = (data.hasOwnProperty("fill")) ? data.fill : true;
 
+    // Replace building
+    if (data.hasOwnProperty("building")) {
+        if ((data.building === "") && layers.hasOwnProperty("buildings")) {
+            map.removeLayer(layers["buildings"]);
+            layercontrol._update();
+            layers["buildings"] = overlays["buildings"].set("");
+            return;
+        }
+        //layers["buildings"] = new OSMBuildings(map).set(data.building);
+        layers["buildings"] = overlays["buildings"].set(data.building);
+        map.addLayer(layers["buildings"]);
+        return;
+    }
     var lay = data.layer || "unknown";
     if (typeof layers[lay] == "undefined") {  // add layer if if doesn't exist
         //layers[lay] = new L.LayerGroup().addTo(map);
diff --git a/worldmap/worldmap.appcache b/worldmap/worldmap.appcache
index 6659bdd..7201252 100644
--- a/worldmap/worldmap.appcache
+++ b/worldmap/worldmap.appcache
@@ -1,5 +1,5 @@
 CACHE MANIFEST
-# date: Jan 31st 2018 - v1.1.10
+# date: May 28th 2018 - v1.1.13
 
 CACHE:
 index.html