# Building permits at 3171 4th St, Boulder, CO

Two permits here in the last two years. The newest, Sep 8: NKB110 Lochinvar Noble Wall Mount High Efficiency Boiler. 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 |
|---|---|---|---|---|
| Sep 8, 2026 | Mechanical (HVAC) | NKB110 Lochinvar Noble Wall Mount High Efficiency Boiler. 95% AFUE 110,000 BTU 10:1 Turndown Ratio 2" Venting up to 100' Universal Vent Connector Features SMART CONTROL? PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plastic glued vents for fuel burning appliances must | $12,093 | [MEC2026-01647](https://nearbypermits.com/boulder/permit/MEC2026-01647/) |
| May 14, 2025 | Mechanical (HVAC) | New single zone Mitsubishi heat pump - 12,000 BTU/cooling capacity, 26.7 SEER, 13,000 high heat, 10.6 HSPF. Add sub panel and new electrical circuit for condenser. | $7,071 | [MEC2025-00758](https://nearbypermits.com/boulder/permit/MEC2025-00758/) |

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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 11:21 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/3171-4th-st/