# Building permits at 2144 S Walnut St, Boulder, CO

One permit on record here. The newest, Apr 29, 2025: Removing existing water heater and installing a 50 gallon electric heat pump water heater. 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, 2025 | Mechanical (HVAC) | removing existing water heater and installing a 50 gallon electric heat pump water heater. | $4,410 | [MEC2025-00647](https://nearbypermits.com/boulder/permit/MEC2025-00647/) |

## More on this street

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

- [2130 S Walnut St 26](https://nearbypermits.com/boulder/address/2130-s-walnut-st-26/): newest permit Apr 16, 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 15:48 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/2144-s-walnut-st/