# Building permits at 900 Maxwell Ave, Boulder, CO

Two permits here in the last two years. The newest, Jul 16: Upgrade service from 150 amps to 320 amps on exterior of south side of house. 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 |
|---|---|---|---|---|
| Jul 16, 2026 | Electrical | Upgrade service from 150 amps to 320 amps on exterior of south side of house | $5,000 | [ELE2026-00754](https://nearbypermits.com/boulder/permit/ELE2026-00754/) |
| Oct 17, 2025 | Addition | REVISION 9/11/26- Revisions to the layout of the rooms and the foundation conditions under the exterior stairwell. A 605 SF addition through a basement conversion from an existing uninhabitable space below the existing first floor. Some interior and exterior renovations are part of the scope of work | $521,256 | [BLD-SFD2025-00023](https://nearbypermits.com/boulder/permit/BLD-SFD2025-00023/) |

## More on this street

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

- [937 Maxwell Ave](https://nearbypermits.com/boulder/address/937-maxwell-ave/): newest permit Nov 24, 2025
- [834 Maxwell Ave](https://nearbypermits.com/boulder/address/834-maxwell-ave/): newest permit Apr 27, 2026
- [826 Maxwell Ave](https://nearbypermits.com/boulder/address/826-maxwell-ave/): newest permit Jun 15, 2026
- [818 Maxwell Ave](https://nearbypermits.com/boulder/address/818-maxwell-ave/): newest permit Oct 24, 2024
- [815 Maxwell Ave 3](https://nearbypermits.com/boulder/address/815-maxwell-ave-3/): newest permit Aug 11, 2026
- [806 Maxwell Ave](https://nearbypermits.com/boulder/address/806-maxwell-ave/): newest permit Dec 11, 2025
- [1000 Maxwell Ave](https://nearbypermits.com/boulder/address/1000-maxwell-ave/): newest permit Jul 20, 2026
- [1020 Maxwell Ave](https://nearbypermits.com/boulder/address/1020-maxwell-ave/): newest permit Oct 29, 2024
- [716 Maxwell Ave](https://nearbypermits.com/boulder/address/716-maxwell-ave/): newest permit Oct 14, 2025
- [707 Maxwell Ave](https://nearbypermits.com/boulder/address/707-maxwell-ave/): newest permit Nov 19, 2025

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-06 17:22 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/900-maxwell-ave/