# Building permits at 820 12th St, Boulder, CO

Five permits on record here. The newest, May 29, 2025: VOID- 180 Days no activity Install two egress windows in lower level of single family detached dwelling. 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 |
|---|---|---|---|---|
| May 29, 2025 | Alteration or repair | VOID- 180 Days no activity Install two egress windows in lower level of single family detached dwelling. | $4,500 | [BLD-SFD2025-00174](https://nearbypermits.com/boulder/permit/BLD-SFD2025-00174/) |
| Mar 3, 2025 | Roofing | Total tear-off & reroof of SFD, 21 squares of dimensional shingles on a pitch represented as 4/12. All roof materials shall be installed per manufacturer?s specs. Mid-roof inspection required if pitch is less than 4/12. All roof covering materials shall be listed as Class A as tested in accordance w | $7,078 | [RFG2025-00068](https://nearbypermits.com/boulder/permit/RFG2025-00068/) |
| May 8, 2013 | Mechanical (HVAC) | Replacement Water Heater | $1,081 | [PMT2013-20151-MEC](https://nearbypermits.com/boulder/permit/PMT2013-20151-MEC/) |
| Sep 28, 1992 | Addition | Dining room addition to south side of house the original general permit number | $7,500 | [PMT1992-03945](https://nearbypermits.com/boulder/permit/PMT1992-03945/) |
| Jun 15, 1990 | Mechanical (HVAC) | Mechanical WTR HTR | $400 | [PMT1990-R0946-MEC](https://nearbypermits.com/boulder/permit/PMT1990-R0946-MEC/) |

## More on this street

Other addresses on 12th St with permits, nearest house number first:

- [830 12th St](https://nearbypermits.com/boulder/address/830-12th-st/): newest permit Jan 20, 2026
- [840 12th St](https://nearbypermits.com/boulder/address/840-12th-st/): newest permit Sep 29, 2025
- [845 12th St](https://nearbypermits.com/boulder/address/845-12th-st/): newest permit Oct 13, 2025
- [891 12th St](https://nearbypermits.com/boulder/address/891-12th-st/): newest permit Oct 8, 2025
- [735 12th St](https://nearbypermits.com/boulder/address/735-12th-st/): newest permit Oct 18, 2024
- [907 12th St](https://nearbypermits.com/boulder/address/907-12th-st/): newest permit Dec 4, 2025
- [728 12th St](https://nearbypermits.com/boulder/address/728-12th-st/): newest permit Aug 8, 2025
- [916 12th St](https://nearbypermits.com/boulder/address/916-12th-st/): newest permit May 16, 2025
- [955 12th St](https://nearbypermits.com/boulder/address/955-12th-st/): newest permit Sep 28, 2026
- [655 12th St](https://nearbypermits.com/boulder/address/655-12th-st/): newest permit Feb 27, 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 21:26 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/820-12th-st/