# Building permits at 1820 18th St, Boulder, CO

One permit here in the last two years. The newest, Apr 29: York 2stage furnace. 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 29, 2026 | Mechanical (HVAC) | York 2stage furnace. 80% Efficiency. 80K BTU NO EXTERIOR WORK TO BE DONE 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 evid | $2,606 | [MEC2026-00636](https://nearbypermits.com/boulder/permit/MEC2026-00636/) |

## More on this street

Other addresses on 18th St with permits, nearest house number first:

- [1934 18th St](https://nearbypermits.com/boulder/address/1934-18th-st/): newest permit Jan 24, 2025
- [2002 18th St](https://nearbypermits.com/boulder/address/2002-18th-st/): newest permit Jul 16, 2025
- [1633 18th St 6](https://nearbypermits.com/boulder/address/1633-18th-st-6/): newest permit Jun 29, 2026
- [2008 18th St](https://nearbypermits.com/boulder/address/2008-18th-st/): newest permit Dec 16, 2025
- [2014 18th St](https://nearbypermits.com/boulder/address/2014-18th-st/): newest permit Mar 21, 2025
- [2016 18th St](https://nearbypermits.com/boulder/address/2016-18th-st/): newest permit Sep 12, 2025
- [1623 18th St](https://nearbypermits.com/boulder/address/1623-18th-st/): newest permit Jul 17, 2026
- [2119 18th St](https://nearbypermits.com/boulder/address/2119-18th-st/): newest permit Sep 10, 2026
- [2121 18th St](https://nearbypermits.com/boulder/address/2121-18th-st/): newest permit Sep 10, 2026
- [1430 18th St 16](https://nearbypermits.com/boulder/address/1430-18th-st-16/): newest permit Feb 27, 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 19:47 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/1820-18th-st/