# Building permits at 3307 4th St, Boulder, CO

One permit here in the last two years. The newest, Apr 13: Install 2 Mini Split heat pumps on roof Any electrical work required beyond a like-for-like replacement of. 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 |
|---|---|---|---|---|
| Apr 13, 2026 | Mechanical (HVAC) | Install 2 Mini Split heat pumps on roof Any electrical work required beyond a like-for-like replacement of equipment will require an electrical permit for inspection of the electrical scope. PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plastic glued vents for fuel bu | $23,264 | [MEC2026-00561](https://nearbypermits.com/boulder/permit/MEC2026-00561/) |

## More on this street

Other addresses on 4th St with permits, nearest house number first:

- [3309 4th St](https://nearbypermits.com/boulder/address/3309-4th-st/): newest permit May 22, 2025
- [3311 4th St](https://nearbypermits.com/boulder/address/3311-4th-st/): newest permit Nov 17, 2025
- [3302 4th St](https://nearbypermits.com/boulder/address/3302-4th-st/): newest permit Jul 3, 2025
- [3355 4th St](https://nearbypermits.com/boulder/address/3355-4th-st/): newest permit Jul 9, 2026
- [3369 4th St](https://nearbypermits.com/boulder/address/3369-4th-st/): newest permit Dec 11, 2025
- [3239 4th St](https://nearbypermits.com/boulder/address/3239-4th-st/): newest permit Oct 21, 2024
- [3380 4th St](https://nearbypermits.com/boulder/address/3380-4th-st/): newest permit Apr 3, 2026
- [3232 4th St](https://nearbypermits.com/boulder/address/3232-4th-st/): newest permit Dec 12, 2024
- [3231 4th St](https://nearbypermits.com/boulder/address/3231-4th-st/): newest permit Aug 21, 2025
- [3229 4th St](https://nearbypermits.com/boulder/address/3229-4th-st/): newest permit Sep 16, 2025

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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 12:06 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/3307-4th-st/