---
title: "Display buildings in 3D | JavaScript maps SDK"
description: "Use extrusions to display height of buildings in 3D."
---
> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.
# Display buildings in 3D
Display the height of buildings in 3D using [extrusions](https://docs.maptiler.com/gl-style-specification/layers/#fill-extrusion).
### NPM module setup
```bash
npm install --save @maptiler/sdk
```
#### main.js
```js
import { Map, MapStyle, config } from '@maptiler/sdk';
import '@maptiler/sdk/dist/maptiler-sdk.css';
config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
const map = new Map({
container: 'map',
style: MapStyle.BASE,
center: [-74.0066, 40.7135],
zoom: 15.5,
pitch: 45,
bearing: -17.6
});
// The 'building' layer in the streets vector source contains building-height
// data from MapTiler Planet: https://www.maptiler.com/planet/.
map.on('load', function () {
// Insert the layer beneath any symbol layer.
// Learn how to find specific layer id https://docs.maptiler.com/sdk-js/examples/geojson-layer-in-stack/#learn-more
const layers = map.getStyle().layers;
let labelLayerId;
for (let i = 0; i < layers.length; i++) {
if (layers[i].type === 'symbol' && layers[i].layout['text-field']) {
labelLayerId = layers[i].id;
break;
}
}
map.addLayer(
{
"id": "Building 3D",
"source": "maptiler_planet", // read more about MapTiler Planet: https://docs.maptiler.com/schema/planet/
"type": "fill-extrusion",
"source-layer": "building",
"filter": [
"!has",
"hide_3d"
], // filter out buildings that should not be displayed in 3D
"minzoom": 15,
"paint": {
"fill-extrusion-color": "hsl(44,14%,79%)",
"fill-extrusion-height": {
"property": "height",
"type": "identity"
},
"fill-extrusion-opacity": 0.6
},
}, labelLayerId
);
});
```
#### index.html
```html
Display buildings in 3D | NPM example
```
#### style.css
```css
body {margin: 0; padding: 0;}
#map {position: absolute; top: 0; bottom: 0; width: 100%;}
```
### Basic JavaScript setup
```html
Display buildings in 3D
```