# Building permits at 865 Union Ave, Boulder, CO

Three permits on record here. The newest, Aug 14: Installation of new NFPA 13D fire sprinkler system with a dedicated fire main with backflow. 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 |
|---|---|---|---|---|
| Aug 14, 2026 | Fire systems | Installation of new NFPA 13D fire sprinkler system with a dedicated fire main with backflow | $19,247 | [FIR2026-00270](https://nearbypermits.com/boulder/permit/FIR2026-00270/) |
| Apr 17, 2026 | Electrical | REVISION 9/10/26-Updated Conductor to SCR Al XHHW-2 cable and removed the conduit callouts. Roof mounted PV solar | $38,247 | [ELE2026-00301](https://nearbypermits.com/boulder/permit/ELE2026-00301/) |
| Dec 24, 2025 | New building | Revision 9/30/2026 to include 34 sf concrete porch at rear of house and 169 sf covered porch. Includes can lighting and ceiling fan. 2961 sqft single family home, 5 bedroom, 5 bathroom. Additional 1071 finished basement sqft. | $1,141,000 | [BLD-SFD2025-00220](https://nearbypermits.com/boulder/permit/BLD-SFD2025-00220/) |

## More on this street

Other addresses on Union Ave with permits, nearest house number first:

- [862 Union Ave](https://nearbypermits.com/boulder/address/862-union-ave/): newest permit Jul 9, 2026
- [860 Union Ave](https://nearbypermits.com/boulder/address/860-union-ave/): newest permit Sep 21, 2026
- [855 Union Ave](https://nearbypermits.com/boulder/address/855-union-ave/): newest permit May 7, 2026
- [840 Union Ave](https://nearbypermits.com/boulder/address/840-union-ave/): newest permit Mar 3, 2026
- [890 Union Ave](https://nearbypermits.com/boulder/address/890-union-ave/): newest permit Mar 18, 2026
- [830 Union Ave](https://nearbypermits.com/boulder/address/830-union-ave/): newest permit Oct 2, 2026
- [906 Union Ave](https://nearbypermits.com/boulder/address/906-union-ave/): newest permit Jul 22, 2025
- [800 Union Ave](https://nearbypermits.com/boulder/address/800-union-ave/): newest permit Feb 3, 2025
- [933 Union Ave](https://nearbypermits.com/boulder/address/933-union-ave/): newest permit Sep 16, 2026
- [792 Union Ave](https://nearbypermits.com/boulder/address/792-union-ave/): newest permit Nov 19, 2024

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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 14:19 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/865-union-ave/