# Building permits at 1635 6th St, Boulder, CO

One permit here in the last two years. The newest, Jan 21: Installation of a Burnham atmospheric cast iron boiler (standard efficiency) as part of a complete mechanical. 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 |
|---|---|---|---|---|
| Jan 21, 2026 | Mechanical (HVAC) | Installation of a Burnham atmospheric cast iron boiler (standard efficiency) as part of a complete mechanical room system replacement. Includes removal of the existing boiler system (if applicable) and full installation of the following: -Burnham cast iron boiler (model sized to home?s heat load) -S | $27,312 | [MEC2026-00063](https://nearbypermits.com/boulder/permit/MEC2026-00063/) |

## More on this street

Other addresses on 6th St with permits, nearest house number first:

- [1607 6th St](https://nearbypermits.com/boulder/address/1607-6th-st/): newest permit Mar 7, 2025
- [1680 6th St](https://nearbypermits.com/boulder/address/1680-6th-st/): newest permit Oct 17, 2025
- [1521 6th St](https://nearbypermits.com/boulder/address/1521-6th-st/): newest permit Aug 11, 2026
- [1777 6th St](https://nearbypermits.com/boulder/address/1777-6th-st/): newest permit Mar 19, 2026
- [1332 6th St](https://nearbypermits.com/boulder/address/1332-6th-st/): newest permit Jun 2, 2026
- [1327 6th St](https://nearbypermits.com/boulder/address/1327-6th-st/): newest permit Jun 25, 2026
- [1201 6th St](https://nearbypermits.com/boulder/address/1201-6th-st/): newest permit Dec 20, 2024
- [2136 6th St](https://nearbypermits.com/boulder/address/2136-6th-st/): newest permit Jun 26, 2026
- [1116 6th St](https://nearbypermits.com/boulder/address/1116-6th-st/): newest permit Jun 12, 2026
- [1115 6th St](https://nearbypermits.com/boulder/address/1115-6th-st/): newest permit Oct 14, 2024

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 11:29 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/1635-6th-st/