# Building permits at 4450 Grinnell Ave, Boulder, CO

Five permits on record here. The newest, Jun 16, 2025: VOID- 180+ days without inspection Wall bracing and spall repair for a basement foundation wall of a single. 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 |
|---|---|---|---|---|
| Jun 16, 2025 | Alteration or repair | VOID- 180+ days without inspection Wall bracing and spall repair for a basement foundation wall of a single family dwelling. | $10,500 | [BLD-SFD2025-00219](https://nearbypermits.com/boulder/permit/BLD-SFD2025-00219/) |
| Oct 16, 2024 | Alteration or repair | 360 Sq Ft. gabled roof patio cover. This patio cover will tie into the existing roof structure and will have lights and electrical outlets. | $45,000 | [BLD-SFD2024-00385](https://nearbypermits.com/boulder/permit/BLD-SFD2024-00385/) |
| Jul 29, 2024 | Electrical | 200 amp overhead service change. New meter, service cable, and grounding | $4,400 | [ELE2024-00619](https://nearbypermits.com/boulder/permit/ELE2024-00619/) |
| Nov 15, 2022 | Mechanical (HVAC) | VOID-180 days no activity Replacement of a 50 gallon water heater | $2,500 | [MEC2022-01973](https://nearbypermits.com/boulder/permit/MEC2022-01973/) |
| Aug 10, 2009 | Electrical | Electrical Permit - For service change only to 200 amps. | $800 | [PMT2009-03115-ELE](https://nearbypermits.com/boulder/permit/PMT2009-03115-ELE/) |

## 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 Grinnell Ave with permits, nearest house number first:

- [4430 Grinnell Ave](https://nearbypermits.com/boulder/address/4430-grinnell-ave/): newest permit Sep 3, 2026
- [4497 Grinnell Ave](https://nearbypermits.com/boulder/address/4497-grinnell-ave/): newest permit Oct 27, 2025
- [4395 Grinnell Ave](https://nearbypermits.com/boulder/address/4395-grinnell-ave/): newest permit Jun 25, 2026

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-09 04:16 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 5 permits at this address: https://nearbypermits.com/boulder/address/4450-grinnell-ave/