# Building permits at 2921 21st St, Boulder, CO

Three permits on record here. The newest, Oct 7, 2025: Replace failed 50 gallon gas water heater with similar unit All new plastic glued vents for fuel burning. 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 |
|---|---|---|---|---|
| Oct 7, 2025 | Mechanical (HVAC) | replace failed 50 gallon gas water heater with similar unit All new plastic glued vents for fuel burning appliances must undergo pressure testing. To facilitate the inspection process, please provide photographic evidence of the pressure test directly to the assigned inspector on the day the rough m | $3,800 | [MEC2025-01601](https://nearbypermits.com/boulder/permit/MEC2025-01601/) |
| May 16, 2009 | Mechanical (HVAC) | Replacement Water Heater | $1,800 | [PMT2009-20078-MEC](https://nearbypermits.com/boulder/permit/PMT2009-20078-MEC/) |
| May 15, 2009 | Mechanical (HVAC) | Replacement Forced Air Furnace | $2,084 | [PMT2009-20077-MEC](https://nearbypermits.com/boulder/permit/PMT2009-20077-MEC/) |

## Zoning requests nearby

We don't list zoning cases for Boulder yet. Look them up on the city's Board of Zoning Adjustment page: https://bouldercolorado.gov/government/board-commission/board-zoning-adjustment

## More on this street

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

- [2941 21st St](https://nearbypermits.com/boulder/address/2941-21st-st/): newest permit Nov 18, 2025
- [2881 21st St](https://nearbypermits.com/boulder/address/2881-21st-st/): newest permit Sep 23, 2026
- [2980 21st St](https://nearbypermits.com/boulder/address/2980-21st-st/): newest permit Jul 20, 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
- [2225 21st St](https://nearbypermits.com/boulder/address/2225-21st-st/): newest permit Apr 9, 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

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-10 11:33 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 3 permits at this address: https://nearbypermits.com/boulder/address/2921-21st-st/