# Building permits at 3875 15th St, Boulder, CO

Two permits on record here. The newest, Jan 29, 2025: New 3-1 Mitsubishi. 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 |
|---|---|---|---|---|
| Jan 29, 2025 | Mechanical (HVAC) | New 3-1 Mitsubishi. 30,000 BTU, 28,400 cooling capacity, 18 SEER, 28,600 high heat, 10 HSPF. New electrical circuit for condenser. | $12,197 | [MEC2025-00160](https://nearbypermits.com/boulder/permit/MEC2025-00160/) |
| Mar 27, 2024 | Plumbing | *Voided for inactivity - no inspections for 180 days.* replace the failed WH with like, 40 gallon gas | $3,430 | [MEC2024-00409](https://nearbypermits.com/boulder/permit/MEC2024-00409/) |

## More on this street

Other addresses on 15th St with permits, nearest house number first:

- [3879 15th St](https://nearbypermits.com/boulder/address/3879-15th-st/): newest permit May 7, 2026
- [3889 15th St](https://nearbypermits.com/boulder/address/3889-15th-st/): newest permit Jun 10, 2026
- [3919 15th St](https://nearbypermits.com/boulder/address/3919-15th-st/): newest permit Aug 22, 2025
- [3924 15th St](https://nearbypermits.com/boulder/address/3924-15th-st/): newest permit Sep 18, 2026
- [3966 15th St](https://nearbypermits.com/boulder/address/3966-15th-st/): newest permit Mar 26, 2026
- [4135 15th St](https://nearbypermits.com/boulder/address/4135-15th-st/): newest permit Mar 6, 2026
- [4144 15th St](https://nearbypermits.com/boulder/address/4144-15th-st/): newest permit Sep 5, 2025
- [4176 15th St](https://nearbypermits.com/boulder/address/4176-15th-st/): newest permit Jan 14, 2026
- [3390 15th St](https://nearbypermits.com/boulder/address/3390-15th-st/): newest permit Jun 24, 2026
- [3370 15th St](https://nearbypermits.com/boulder/address/3370-15th-st/): newest permit Jul 23, 2025

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-08 09:59 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/3875-15th-st/