Ventilation upgrade affecting the first floor machine shop
Mechanical (HVAC) 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
- Type of work
- Mechanical (HVAC)
- Status
- Issued
- Reported cost
- $320,000
- ZIP code
- 80301
- City's category
- Mechanical Permit, Mechanical with Electrical
- City's status
- Issued
- Source
- Boulder Planning and Development Services permit data (this record)
Type of work and status are our own standard labels, so permits compare across cities. The city's wording is in the "City's category" and "City's status" rows. We show costs under $100 as not listed, because filers often enter $0 or $1 when the city doesn't require a cost.
All permits at 3450 Mitchell Ln, and what's permitted nearby
Boulder Planning and Development Services updated its data Oct 6, 2026. We checked it Oct 6, 16:42 UTC. See the city's official records.
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