# Building permits at 721 9th St, Boulder, CO

Two permits here in the last two years. The newest, Mar 30: Replacement furnace and heat pump replacing air conditioner. 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 |
|---|---|---|---|---|
| Mar 30, 2026 | Mechanical (HVAC) | Replacement furnace and heat pump replacing air conditioner. PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plastic glued vents for fuel burning appliances must undergo pressure testing. To facilitate the inspection process, please provide photographic evidence of the  | $17,786 | [MEC2026-00469](https://nearbypermits.com/boulder/permit/MEC2026-00469/) |
| Feb 11, 2025 | Mechanical (HVAC) | VOID - 180 Days no activity Replacing 80% 70MBTUH gas furnace | $5,184 | [MEC2025-00232](https://nearbypermits.com/boulder/permit/MEC2025-00232/) |

## More on this street

Other addresses on 9th St with permits, nearest house number first:

- [740 9th St](https://nearbypermits.com/boulder/address/740-9th-st/): newest permit Apr 25, 2025
- [748 9th St](https://nearbypermits.com/boulder/address/748-9th-st/): newest permit Aug 20, 2026
- [780 9th St](https://nearbypermits.com/boulder/address/780-9th-st/): newest permit Mar 30, 2026
- [787 9th St](https://nearbypermits.com/boulder/address/787-9th-st/): newest permit Apr 3, 2026
- [828 9th St](https://nearbypermits.com/boulder/address/828-9th-st/): newest permit Mar 19, 2025
- [835 9th St](https://nearbypermits.com/boulder/address/835-9th-st/): newest permit May 21, 2026
- [836 9th St](https://nearbypermits.com/boulder/address/836-9th-st/): newest permit Apr 20, 2026
- [875 9th St](https://nearbypermits.com/boulder/address/875-9th-st/): newest permit Jul 20, 2026
- [938 9th St](https://nearbypermits.com/boulder/address/938-9th-st/): newest permit Nov 25, 2024
- [1010 9th St](https://nearbypermits.com/boulder/address/1010-9th-st/): newest permit Sep 18, 2026

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-06 15:04 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Both permits at this address: https://nearbypermits.com/boulder/address/721-9th-st/