# Building permits at 854 Walnut St, Boulder, CO

Two permits on record here. The newest, May 27: Replacement Boiler PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plastic. 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 |
|---|---|---|---|---|
| May 27, 2026 | Mechanical (HVAC) | Replacement Boiler 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 evidence of the pressure test directly to the assigned ins | $9,577 | [MEC2026-00843](https://nearbypermits.com/boulder/permit/MEC2026-00843/) |
| Aug 12, 1988 | Electrical | Electrical COOLER ELEC | $150 | [PMT1988-N0345-ELE](https://nearbypermits.com/boulder/permit/PMT1988-N0345-ELE/) |

## More on this street

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

- [848 Walnut St](https://nearbypermits.com/boulder/address/848-walnut-st/): newest permit Jun 22, 2026
- [824 Walnut St 46](https://nearbypermits.com/boulder/address/824-walnut-st-46/): newest permit Sep 9, 2026
- [812 Walnut St](https://nearbypermits.com/boulder/address/812-walnut-st/): newest permit Sep 28, 2026
- [790 Walnut St B](https://nearbypermits.com/boulder/address/790-walnut-st-b/): newest permit Oct 27, 2025
- [921 Walnut St](https://nearbypermits.com/boulder/address/921-walnut-st/): newest permit Aug 5, 2026
- [770 Walnut St B](https://nearbypermits.com/boulder/address/770-walnut-st-b/): newest permit Aug 12, 2026
- [760 Walnut St](https://nearbypermits.com/boulder/address/760-walnut-st/): newest permit Mar 27, 2026
- [750 Walnut St](https://nearbypermits.com/boulder/address/750-walnut-st/): newest permit Sep 28, 2026
- [711 Walnut St](https://nearbypermits.com/boulder/address/711-walnut-st/): newest permit Jun 3, 2026
- [1002 Walnut St](https://nearbypermits.com/boulder/address/1002-walnut-st/): newest permit Dec 10, 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 15:21 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Both permits at this address: https://nearbypermits.com/boulder/address/854-walnut-st/