OSM Buildings Tutorial
How to Import OSM Buildings into Blender with BlenderGIS (2026)
OpenStreetMap holds building footprints for most of the world’s cities — and BlenderGIS pulls them straight into Blender through the Overpass API, extruded into 3D massing. This guide covers the full process with BlenderGIS v2.2.15: framing your site on a basemap, running the query, extruding with height tags, fixing the common failures, and keeping large areas fast.
What you get: real building footprints from OpenStreetMap at true geographic scale, extruded into 3D blocks — a city massing model built from live map data in minutes. Ideal for site context, urban studies, and early massing renders.
Before You Start
- BlenderGIS installed and current. Use v2.2.15 (December 2025) from our download page — the .zip goes in unzipped via Edit > Preferences > Add-ons > Install. Older versions can send queries that current Overpass servers reject.
- A basemap for framing. You define the import area visually, so load imagery first via GIS menu > Web geodata > Basemap. MapTiler has required a free API key since 2022 — see the MapTiler key guide if tiles stay blank.
- Start small. Overpass is a free, shared service with strict per-query limits. Begin with a few city blocks, not a whole downtown — oversized queries get refused outright (see the 406 error guide).
- Set realistic expectations. OSM data quality varies by city. Well-mapped downtowns import beautifully; suburbs may have footprints with no height data at all. That is normal — this guide shows how to work with it.
Import OSM Buildings, Step by Step
- Load a basemap and frame your site. GIS menu > Web geodata > Basemap, pick an imagery source, and navigate so your area fills the 3D view. What the view covers is what the query will cover.
- Open the OSM import. In the GIS menu go to Import and choose the OpenStreetMap (Overpass API) option. BlenderGIS sends a structured query to the Overpass server for the features inside your view extent.
- Select the buildings filter. Choose the buildings preset so the query requests footprints only — pulling the full OSM dataset would make the query far heavier.
- Enable extrusion. Turn on the extrude option so BlenderGIS reads each building’s height and building:levels tags and raises footprints into 3D blocks. Where tags exist, heights are real data; where they don’t, you get a fallback height (explained below).
- Run the import and inspect. Allow a few seconds to a minute depending on density, then orbit the scene and compare the blocks against the basemap.
- Clean up. Select the imported meshes, run Mesh > Clean Up > Merge by Distance to weld duplicate vertices, and assign a simple flat material for a clean massing look.
Troubleshooting and Performance
Two complaints come up constantly — both have honest explanations — plus the habits that keep big imports fast.
“All my buildings are the same height”
This is the normal case, not a bug. Most OSM buildings carry no height or building:levels tags — mappers traced the footprint but never recorded the height. BlenderGIS cannot invent data that isn’t there, so untagged buildings get a uniform default extrusion. Practical fixes: import a smaller, better-mapped area, check tag coverage for your city on openstreetmap.org first, or manually adjust landmark buildings and leave the rest as context.
“No buildings imported at all”
Check three things: 1) Is the area too large? Overpass refuses oversized queries — retry with a smaller extent (see the 406 error guide). 2) Does OSM actually have buildings mapped there? Some areas genuinely have none. 3) Did you select the buildings filter? The wrong feature type returns an empty result that looks like a failure. A related symptom: buildings floating above or sinking into the terrain means the flat footprints don’t match your undulating DEM — drape them onto the terrain or set a uniform base height for flat urban sites.
- Tile large areas. Import district by district with small bounding boxes, then join — this avoids Overpass refusals and keeps each import fast.
- Check coverage before extruding. Run one import without extrusion to confirm footprints look right, then re-import the final area with extrusion on.
- Keep massing low-poly. Extruded footprints are context, not hero geometry — flat shading, no bevels. Organize tiles into collections so you can hide everything except your work area.
Want richer building detail? BlenderGIS gives you honest massing from raw OSM data for free. For more refined OSM building visualization — better roofs, textures, and facade detail with less manual cleanup — the specialist tool is BlenderOSM Premium ($17.80 one-time). Our BlenderGIS vs BlenderOSM comparison breaks down exactly where each tool wins.
Other errors — refused queries, blank basemaps, missing panels? The troubleshooting hub covers the common failure modes in one place.
Frequently Asked Questions
Why are all my imported buildings the same height?
Most OSM buildings have no height or building:levels tags — mappers traced footprints without recording heights. BlenderGIS extrudes untagged buildings at a uniform default height; it cannot invent data that isn’t in the map.
Why did my import fail with an Overpass 406 error?
Overpass refused your query — almost always an oversized bounding box or rate limiting. Shrink the area, import in tiles, and wait before retrying. Full diagnosis in the 406 error guide.
Do I need an API key to import OSM buildings?
No. Overpass needs no key — it is a free public service. Keys only matter for basemap imagery: MapTiler has required a free key since 2022.
Can I import roads, water, and land use the same way?
Yes. The same Overpass import dialog offers filters for roads, waterways, land use, and more — run one import per feature type to keep queries light and results organized.
Which Blender versions does BlenderGIS support?
Blender 2.83 through 5.0 (minimum 2.83 LTS). The current release is v2.2.15, published December 20, 2025 — get it from our download page.
BlenderGIS or BlenderOSM — which is better for buildings?
BlenderGIS is free and open source (GPL-3.0): solid massing from raw OSM data, plus terrain, DEMs, and full GIS tooling. BlenderOSM Premium ($17.80 one-time) specializes in more detailed building visualization with less setup. See the head-to-head comparison.