# Building permits at 303 21st St, Boulder, CO

One permit here in the last two years. The newest, Nov 6, 2024: Boiler Install 199K BTU, 95%. Boulder publishes permits without map coordinates, so this address has no map and no quarter-mile list.

## At this address

| Date | Type | Work | Cost | Permit |
|---|---|---|---|---|
| Nov 6, 2024 | Mechanical (HVAC) | Boiler Install 199K BTU, 95% | $13,463 | [MEC2024-01564](https://nearbypermits.com/boulder/permit/MEC2024-01564/) |

## More on this street

Other addresses on 21st St with permits, nearest house number first:

- [365 21st St](https://nearbypermits.com/boulder/address/365-21st-st/): newest permit Jun 9, 2025
- [2225 21st St](https://nearbypermits.com/boulder/address/2225-21st-st/): newest permit Apr 9, 2026
- [2327 21st St](https://nearbypermits.com/boulder/address/2327-21st-st/): newest permit Aug 25, 2026
- [2820 21st St](https://nearbypermits.com/boulder/address/2820-21st-st/): newest permit Jul 28, 2026
- [2860 21st St](https://nearbypermits.com/boulder/address/2860-21st-st/): newest permit Aug 18, 2026
- [2881 21st St](https://nearbypermits.com/boulder/address/2881-21st-st/): newest permit Sep 23, 2026
- [2921 21st St](https://nearbypermits.com/boulder/address/2921-21st-st/): newest permit Oct 7, 2025
- [2941 21st St](https://nearbypermits.com/boulder/address/2941-21st-st/): newest permit Nov 18, 2025
- [2980 21st St](https://nearbypermits.com/boulder/address/2980-21st-st/): newest permit Jul 20, 2026
- [3621 21st St](https://nearbypermits.com/boulder/address/3621-21st-st/): newest permit Jun 24, 2026

---
Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-08 03:10 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

The one permit at this address: https://nearbypermits.com/boulder/address/303-21st-st/