# Building permits at 105 S 31st St, Boulder, CO

Four permits on record here. The newest, Apr 9: Install cold-climate, ductless 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 |
|---|---|---|---|---|
| Apr 9, 2026 | Mechanical (HVAC) | Install cold-climate, ductless heat pump system. 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 tes | $13,778 | [MEC2026-00527](https://nearbypermits.com/boulder/permit/MEC2026-00527/) |
| Oct 5, 2021 | Roofing | *Total tear-off & reroof of SFD, 18 squares of dimensional shingles on a pitch represented as 5/12. All roof materials shall be installed per manufacturer?s specs. Mid-roof inspection required if pitch is less than 4/12. All roof covering materials shall be listed as Class A as tested in accordance  | $6,500 | [RFG2021-00672](https://nearbypermits.com/boulder/permit/RFG2021-00672/) |
| Oct 3, 2016 | Mechanical (HVAC) | Installation of replacement 84%, 100k BTU boiler. | $8,764 | [PMT2016-04575-MEC](https://nearbypermits.com/boulder/permit/PMT2016-04575-MEC/) |
| Nov 19, 2009 | Mechanical (HVAC) | Replacement Low Pressure Boiler | $2,865 | [PMT2009-20249-MEC](https://nearbypermits.com/boulder/permit/PMT2009-20249-MEC/) |

## Zoning requests nearby

We don't list zoning cases for Boulder yet. Look them up on the city's Board of Zoning Adjustment page: https://bouldercolorado.gov/government/board-commission/board-zoning-adjustment

## More on this street

Other addresses on S 31st St with permits, nearest house number first:

- [120 S 31st St](https://nearbypermits.com/boulder/address/120-s-31st-st/): newest permit Sep 15, 2026
- [90 S 31st St](https://nearbypermits.com/boulder/address/90-s-31st-st/): newest permit Dec 10, 2025
- [70 S 31st St](https://nearbypermits.com/boulder/address/70-s-31st-st/): newest permit Jul 8, 2025
- [50 S 31st St](https://nearbypermits.com/boulder/address/50-s-31st-st/): newest permit Oct 7, 2025
- [170 S 31st St](https://nearbypermits.com/boulder/address/170-s-31st-st/): newest permit Aug 4, 2026
- [180 S 31st St](https://nearbypermits.com/boulder/address/180-s-31st-st/): newest permit Jun 9, 2026
- [18 S 31st St](https://nearbypermits.com/boulder/address/18-s-31st-st/): newest permit Oct 7, 2025

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-11 17:05 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 4 permits at this address: https://nearbypermits.com/boulder/address/105-s-31st-st/