# Building permits at 645 S 42nd St, Boulder, CO

Eight permits on record here. The newest, Jun 12, 2025: Replace original casement window on the southeast side of the basement with a new egress window of 32 inches. 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 12, 2025 | Alteration or repair | Replace original casement window on the southeast side of the basement with a new egress window of 32 inches in width. No new header is needed for the new egress window because it's width does not exceed the existing window opening in the basement wall. The concrete wall will be cut to the new egres | $9,000 | [BLD-SFD2025-00221](https://nearbypermits.com/boulder/permit/BLD-SFD2025-00221/) |
| Aug 14, 2023 | Alteration or repair | Kitchen Renovation with improvements to lighting and electrical. Repair and refinish wood floors and repaint. | $25,500 | [BLD-SFD2023-00157](https://nearbypermits.com/boulder/permit/BLD-SFD2023-00157/) |
| Jan 24, 2002 | Electrical | Add a bedroom and egress window (with well) within existing finished basement.U-factor on window shall not exceed.5. | $400 | [PMT2002-00300-ELE](https://nearbypermits.com/boulder/permit/PMT2002-00300-ELE/) |
| Jan 24, 2002 | Alteration or repair | Add a bedroom and egress window (with well) within existing finished basement.U-factor on window shall not exceed.5. | $3,000 | [PMT2002-00300](https://nearbypermits.com/boulder/permit/PMT2002-00300/) |
| Nov 9, 2000 | Electrical | Add covered front porch | Not listed | [PMT2000-04201-ELE](https://nearbypermits.com/boulder/permit/PMT2000-04201-ELE/) |
| Nov 9, 2000 | Addition | Add covered front porch | $4,800 | [PMT2000-04201](https://nearbypermits.com/boulder/permit/PMT2000-04201/) |
| Feb 7, 1989 | Addition | Addition. The original general permit number is p0537. | $10,500 | [PMT1989-P0537](https://nearbypermits.com/boulder/permit/PMT1989-P0537/) |
| Feb 7, 1989 | Fence, wall or deck | Fence 6 foot or less wood fence | $500 | [PMT1989-P0536-FEN](https://nearbypermits.com/boulder/permit/PMT1989-P0536-FEN/) |

## 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 S 42nd St with permits, nearest house number first:

- [640 S 42nd St](https://nearbypermits.com/boulder/address/640-s-42nd-st/): newest permit Aug 5, 2026
- [655 S 42nd St](https://nearbypermits.com/boulder/address/655-s-42nd-st/): newest permit Mar 20, 2025
- [660 S 42nd St](https://nearbypermits.com/boulder/address/660-s-42nd-st/): newest permit Apr 24, 2026
- [620 S 42nd St](https://nearbypermits.com/boulder/address/620-s-42nd-st/): newest permit Aug 6, 2026
- [615 S 42nd St](https://nearbypermits.com/boulder/address/615-s-42nd-st/): newest permit Jan 22, 2026
- [720 S 42nd St](https://nearbypermits.com/boulder/address/720-s-42nd-st/): newest permit Jun 18, 2025
- [550 S 42nd St](https://nearbypermits.com/boulder/address/550-s-42nd-st/): newest permit Jun 22, 2026
- [740 S 42nd St](https://nearbypermits.com/boulder/address/740-s-42nd-st/): newest permit Jul 18, 2025
- [545 S 42nd St](https://nearbypermits.com/boulder/address/545-s-42nd-st/): newest permit Sep 1, 2026
- [540 S 42nd St](https://nearbypermits.com/boulder/address/540-s-42nd-st/): newest permit Sep 4, 2026

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-10 21:33 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 8 permits at this address: https://nearbypermits.com/boulder/address/645-s-42nd-st/