# Building permits at 4660 Sioux Dr, Boulder, CO

Two permits on record here. The newest, Aug 19: Like for like AC replacement 14.3 Seer 2.5 ton PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING. 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 19, 2026 | Mechanical (HVAC) | like for like AC replacement 14.3 Seer 2.5 ton 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  | $6,321 | [MEC2026-01492](https://nearbypermits.com/boulder/permit/MEC2026-01492/) |
| May 27, 2004 | New building | Construction of a new uncovered exterior rear deck (>30" a.f.g.) and a spiral stair. A french door will be installed under an existing window header. | $1,737 | [PMT2004-02033](https://nearbypermits.com/boulder/permit/PMT2004-02033/) |

## More on this street

Other addresses on Sioux Dr with permits, nearest house number first:

- [4545 Sioux Dr](https://nearbypermits.com/boulder/address/4545-sioux-dr/): newest permit May 14, 2025
- [4520 Sioux Dr](https://nearbypermits.com/boulder/address/4520-sioux-dr/): newest permit Jun 25, 2026
- [4830 Sioux Dr](https://nearbypermits.com/boulder/address/4830-sioux-dr/): newest permit Sep 24, 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 21:22 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/4660-sioux-dr/