# Mechanical (HVAC) permit MEC2025-01374 at 3450 Mitchell Ln, Boulder

Boulder Planning and Development Services permit MEC2025-01374: issued Feb 17, 2026 for mechanical (hvac) work at 3450 Mitchell Ln. Ventilation upgrade affecting the first floor machine shop, offices, and adjacent support spaces. In response to a preliminary industrial hygiene study that indicated the need for better exhaust methods and additional ventilation in the shop. 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 inspector on the day the rough mechanical inspection is scheduled. Approved tests: 10 ft water test, 5 PSI positive pressure, or Negative 5 psi air pressure test for 15 Minutes.

- Permit number: MEC2025-01374
- Issued: Feb 17, 2026
- Type of work: Mechanical (HVAC) (city: Mechanical Permit, Mechanical with Electrical)
- Status: Issued (city: Issued)
- Reported cost: $320,000
- ZIP code: 80301
- All permits at this address: https://nearbypermits.com/boulder/address/3450-mitchell-ln/

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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 23:27 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 3450 Mitchell Ln: https://nearbypermits.com/boulder/address/3450-mitchell-ln/