# Building permits at 320 S 40th St, Boulder, CO

Five permits on record here. The newest, Aug 28, 2025: Install 1 egress escape window in basement bedroom by means of expanding the existing opening to install a. 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 28, 2025 | Alteration or repair | Install 1 egress escape window in basement bedroom by means of expanding the existing opening to install a larger, 48" x 48" escape window that exceeds egress code requirements. | $5,800 | [BLD-SFD2025-00323](https://nearbypermits.com/boulder/permit/BLD-SFD2025-00323/) |
| Apr 27, 2016 | Mechanical (HVAC) | Replacement Water Heater | $5,476 | [PMT2016-20139-MEC](https://nearbypermits.com/boulder/permit/PMT2016-20139-MEC/) |
| Jan 30, 2012 | Mechanical (HVAC) | Replacement Forced Air Furnace | $4,921 | [PMT2012-20028-MEC](https://nearbypermits.com/boulder/permit/PMT2012-20028-MEC/) |
| Aug 13, 2007 | Electrical | New PV system. | $4,365 | [PMT2007-03477-ELE](https://nearbypermits.com/boulder/permit/PMT2007-03477-ELE/) |
| May 13, 2002 | Mechanical (HVAC) | Replace hot water heater in single-family residence. | $300 | [PMT2002-01889-MEC](https://nearbypermits.com/boulder/permit/PMT2002-01889-MEC/) |

## More on this street

Other addresses on S 40th St with permits, nearest house number first:

- [310 S 40th St](https://nearbypermits.com/boulder/address/310-s-40th-st/): newest permit May 27, 2026
- [335 S 40th St](https://nearbypermits.com/boulder/address/335-s-40th-st/): newest permit Sep 17, 2026
- [285 S 40th St](https://nearbypermits.com/boulder/address/285-s-40th-st/): newest permit Mar 25, 2026
- [365 S 40th St](https://nearbypermits.com/boulder/address/365-s-40th-st/): newest permit Jul 14, 2025
- [375 S 40th St](https://nearbypermits.com/boulder/address/375-s-40th-st/): newest permit Jul 27, 2026
- [265 S 40th St](https://nearbypermits.com/boulder/address/265-s-40th-st/): newest permit Jul 28, 2026
- [255 S 40th St](https://nearbypermits.com/boulder/address/255-s-40th-st/): newest permit Aug 4, 2025
- [240 S 40th St](https://nearbypermits.com/boulder/address/240-s-40th-st/): newest permit May 5, 2025
- [450 S 40th St](https://nearbypermits.com/boulder/address/450-s-40th-st/): newest permit Feb 19, 2026
- [455 S 40th St](https://nearbypermits.com/boulder/address/455-s-40th-st/): newest permit Apr 1, 2025

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 06:58 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/320-s-40th-st/