# Building permits at 1641 4th St 1, Boulder, CO

One permit here in the last two years. The newest, Sep 11, 2025: Installation of a 2 Ton Mitsubishi Cold Climate Heat Pump 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 |
|---|---|---|---|---|
| Sep 11, 2025 | Mechanical (HVAC) | Installation of a 2 Ton Mitsubishi Cold Climate Heat Pump System. Condenser Model# PUZ-AK24NLHZ, AHU Model# PVA-AA24NL. Electrical to be done by Northern Lights Electric and Scope of Work as follows: GFCI Service Outlet, 25A Circuit Breaker with circuit | $20,140 | [MEC2025-01506](https://nearbypermits.com/boulder/permit/MEC2025-01506/) |

## More on this street

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

- [1632 4th St](https://nearbypermits.com/boulder/address/1632-4th-st/): newest permit Dec 5, 2025
- [1625 4th St](https://nearbypermits.com/boulder/address/1625-4th-st/): newest permit Feb 11, 2026
- [1615 4th St](https://nearbypermits.com/boulder/address/1615-4th-st/): newest permit Aug 17, 2026
- [2035 4th St](https://nearbypermits.com/boulder/address/2035-4th-st/): newest permit May 14, 2025
- [2110 4th St](https://nearbypermits.com/boulder/address/2110-4th-st/): newest permit Sep 8, 2025
- [2121 4th St](https://nearbypermits.com/boulder/address/2121-4th-st/): newest permit Dec 20, 2024
- [2137 4th St](https://nearbypermits.com/boulder/address/2137-4th-st/): newest permit Dec 5, 2024
- [2233 4th St](https://nearbypermits.com/boulder/address/2233-4th-st/): newest permit Jul 8, 2026
- [2237 4th St](https://nearbypermits.com/boulder/address/2237-4th-st/): newest permit Mar 5, 2026
- [2241 4th St](https://nearbypermits.com/boulder/address/2241-4th-st/): newest permit Jun 11, 2026

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 23:47 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/1641-4th-st-1/