# Building permits at 3115 20th St, Boulder, CO

One permit here in the last two years. The newest, Dec 16, 2025: Replace heater and a/c. 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 |
|---|---|---|---|---|
| Dec 16, 2025 | Mechanical (HVAC) | replace heater and a/c | $13,000 | [MEC2025-02244](https://nearbypermits.com/boulder/permit/MEC2025-02244/) |

## More on this street

Other addresses on 20th St with permits, nearest house number first:

- [3110 20th St](https://nearbypermits.com/boulder/address/3110-20th-st/): newest permit Jul 28, 2025
- [3125 20th St](https://nearbypermits.com/boulder/address/3125-20th-st/): newest permit Jun 13, 2025
- [3145 20th St](https://nearbypermits.com/boulder/address/3145-20th-st/): newest permit Sep 18, 2026
- [3210 20th St](https://nearbypermits.com/boulder/address/3210-20th-st/): newest permit Jun 15, 2026
- [2980 20th St](https://nearbypermits.com/boulder/address/2980-20th-st/): newest permit Jan 6, 2025
- [3260 20th St](https://nearbypermits.com/boulder/address/3260-20th-st/): newest permit Mar 14, 2025
- [2940 20th St](https://nearbypermits.com/boulder/address/2940-20th-st/): newest permit Jan 7, 2026
- [2840 20th St](https://nearbypermits.com/boulder/address/2840-20th-st/): newest permit Jun 24, 2026
- [2831 20th St](https://nearbypermits.com/boulder/address/2831-20th-st/): newest permit Dec 18, 2024
- [2810 20th St](https://nearbypermits.com/boulder/address/2810-20th-st/): newest permit Jan 13, 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 14:21 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/3115-20th-st/