# Building permits at 812 Walnut St D, Boulder, CO

One permit here in the last two years. The newest, Aug 14, 2025: *Voided for inactivity - no inspections for 180 days* Direct change out of water sourced air handler and roof. 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 |
|---|---|---|---|---|
| Aug 14, 2025 | Mechanical (HVAC) | *Voided for inactivity - no inspections for 180 days* Direct change out of water sourced air handler and roof top condenser making connections to the existing ductwork, water piping and thermostat. All new plastic glued vents for fuel burning appliances must undergo pressure testing. To facilitate t | $12,500 | [MEC2025-01314](https://nearbypermits.com/boulder/permit/MEC2025-01314/) |

## More on this street

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

- [824 Walnut St 46](https://nearbypermits.com/boulder/address/824-walnut-st-46/): newest permit Sep 9, 2026
- [790 Walnut St B](https://nearbypermits.com/boulder/address/790-walnut-st-b/): newest permit Oct 27, 2025
- [848 Walnut St](https://nearbypermits.com/boulder/address/848-walnut-st/): newest permit Jun 22, 2026
- [770 Walnut St B](https://nearbypermits.com/boulder/address/770-walnut-st-b/): newest permit Aug 12, 2026
- [854 Walnut St](https://nearbypermits.com/boulder/address/854-walnut-st/): newest permit May 27, 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
- [921 Walnut St](https://nearbypermits.com/boulder/address/921-walnut-st/): newest permit Aug 5, 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 2026-10-07 10:19 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/812-walnut-st-d/