# Building permits at 2941 21st St, Boulder, CO

Four permits here in the last two years. The newest, Nov 18, 2025: Residential solar system addition to existing system. 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 18, 2025 | Electrical | Residential solar system addition to existing system. Addition is 4.4 kW to create a total system size of 10.44 kW. *See ELE2025-00466* REVISION 1/27/26-Due to Xcel requirements for interconnection, added a meter collar adapter to tie into the already existing system on the house. | $12,000 | [ELE2025-01222](https://nearbypermits.com/boulder/permit/ELE2025-01222/) |
| Jul 3, 2025 | Electrical | Residential PV system on a new build residential spec home. | $25,844 | [ELE2025-00466](https://nearbypermits.com/boulder/permit/ELE2025-00466/) |
| Jun 6, 2025 | Fire systems | Installation of new fire sprinkler system (FSN13D) | $36,000 | [FIR2025-00213](https://nearbypermits.com/boulder/permit/FIR2025-00213/) |
| Jan 14, 2025 | New building | New Single Family Home | $1,200,000 | [BLD-SFD2024-00227](https://nearbypermits.com/boulder/permit/BLD-SFD2024-00227/) |

## More on this street

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

- [2921 21st St](https://nearbypermits.com/boulder/address/2921-21st-st/): newest permit Oct 7, 2025
- [2980 21st St](https://nearbypermits.com/boulder/address/2980-21st-st/): newest permit Jul 20, 2026
- [2881 21st St](https://nearbypermits.com/boulder/address/2881-21st-st/): newest permit Sep 23, 2026
- [2860 21st St](https://nearbypermits.com/boulder/address/2860-21st-st/): newest permit Aug 18, 2026
- [2820 21st St](https://nearbypermits.com/boulder/address/2820-21st-st/): newest permit Jul 28, 2026
- [2327 21st St](https://nearbypermits.com/boulder/address/2327-21st-st/): newest permit Aug 25, 2026
- [3621 21st St](https://nearbypermits.com/boulder/address/3621-21st-st/): newest permit Jun 24, 2026
- [3633 21st St](https://nearbypermits.com/boulder/address/3633-21st-st/): newest permit Oct 10, 2024
- [3639 21st St](https://nearbypermits.com/boulder/address/3639-21st-st/): newest permit Dec 6, 2024
- [2225 21st St](https://nearbypermits.com/boulder/address/2225-21st-st/): newest permit Apr 9, 2026

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-08 06:13 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 4 permits at this address: https://nearbypermits.com/boulder/address/2941-21st-st/