# Building permits at 309 27th St, Boulder, CO

Three permits on record here. The newest, Jun 23: Installation of 3 Ton Ducted Mitsubishi Heat Pump System. 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 |
|---|---|---|---|---|
| Jun 23, 2026 | Mechanical (HVAC) | Installation of 3 Ton Ducted Mitsubishi Heat Pump System. Condenser Model# SUZ-AK36NLHZ, AHU Model# SVZ-AP36NL. Electrical work to include: add new 30A Breaker with Circuit, 120v GFCI Circuit. PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plastic glued vents for fuel  | $10,750 | [MEC2026-01034](https://nearbypermits.com/boulder/permit/MEC2026-01034/) |
| Oct 15, 2021 | Mechanical (HVAC) | *Voided for inactivity - no inspections within 180 days* Replace water heater with 40 gallon, 40k BTU unit. | $2,989 | [MEC2021-02046](https://nearbypermits.com/boulder/permit/MEC2021-02046/) |
| Jan 6, 2012 | Mechanical (HVAC) | Replace forced air furnace in residence. | $2,013 | [PMT2012-00093-MEC](https://nearbypermits.com/boulder/permit/PMT2012-00093-MEC/) |

## More on this street

Other addresses on 27th St with permits, nearest house number first:

- [308 27th St](https://nearbypermits.com/boulder/address/308-27th-st/): newest permit Dec 16, 2025
- [310 27th St](https://nearbypermits.com/boulder/address/310-27th-st/): newest permit Sep 25, 2026
- [305 27th St](https://nearbypermits.com/boulder/address/305-27th-st/): newest permit Sep 2, 2025
- [302 27th St](https://nearbypermits.com/boulder/address/302-27th-st/): newest permit Oct 31, 2025
- [325 27th St](https://nearbypermits.com/boulder/address/325-27th-st/): newest permit Sep 21, 2026
- [340 27th St](https://nearbypermits.com/boulder/address/340-27th-st/): newest permit Jul 6, 2026
- [375 27th St](https://nearbypermits.com/boulder/address/375-27th-st/): newest permit Apr 27, 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 04:32 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 3 permits at this address: https://nearbypermits.com/boulder/address/309-27th-st/