# Building permits at 840 12th St, Boulder, CO

Eight permits on record here. The newest, Sep 29, 2025: Install Mitsubishi heat pump. 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 |
|---|---|---|---|---|
| Sep 29, 2025 | Mechanical (HVAC) | Install Mitsubishi heat pump. The condenser will be replacing an existing unit. Installing one new indoor head and reusing one indoor head. Electrical service upgrade and wiring for the condenser. 200 amp meter housing with by pass lever. | $13,351 | [MEC2025-01592](https://nearbypermits.com/boulder/permit/MEC2025-01592/) |
| Aug 20, 2020 | Mechanical (HVAC) | *Installing mini split system. | $4,375 | [MEC2020-01328](https://nearbypermits.com/boulder/permit/MEC2020-01328/) |
| Aug 20, 2020 | Electrical | *Electrical for install of min split on permit MEC2020-01328 | $600 | [ELE2020-01156](https://nearbypermits.com/boulder/permit/ELE2020-01156/) |
| May 9, 2013 | Fence, wall or deck | Removal of an existing chain-link fence along the south property line and the chain-link return to the house at the front yard. Install approximately 115 lineal feet of 4' high decorative/ornamental iron replacement fence in substantially the same location. | $7,728 | [PMT2013-02030-FEN](https://nearbypermits.com/boulder/permit/PMT2013-02030-FEN/) |
| Sep 9, 2009 | Electrical | PV installation on SFD. Flush-mounted, grid-tied, 5.16 kW. | $35,394 | [PMT2009-03566-ELE](https://nearbypermits.com/boulder/permit/PMT2009-03566-ELE/) |
| Dec 10, 2007 | Mechanical (HVAC) | Replacement Forced Air Furnace | $5,546 | [PMT2007-20364-MEC](https://nearbypermits.com/boulder/permit/PMT2007-20364-MEC/) |
| May 1, 2002 | Roofing | Total tear off and overlay of the upper 18 squares only. 12/12/ and 4/12 pitch over 30 lb felt. | $4,796 | [PMT2002-01689-RFG](https://nearbypermits.com/boulder/permit/PMT2002-01689-RFG/) |
| Sep 21, 2000 | Mechanical (HVAC) | Install a gas insert. | $449 | [PMT2000-02170-MEC](https://nearbypermits.com/boulder/permit/PMT2000-02170-MEC/) |

## More on this street

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

- [845 12th St](https://nearbypermits.com/boulder/address/845-12th-st/): newest permit Oct 13, 2025
- [830 12th St](https://nearbypermits.com/boulder/address/830-12th-st/): newest permit Jan 20, 2026
- [820 12th St](https://nearbypermits.com/boulder/address/820-12th-st/): newest permit May 29, 2025
- [891 12th St](https://nearbypermits.com/boulder/address/891-12th-st/): newest permit Oct 8, 2025
- [907 12th St](https://nearbypermits.com/boulder/address/907-12th-st/): newest permit Dec 4, 2025
- [916 12th St](https://nearbypermits.com/boulder/address/916-12th-st/): newest permit May 16, 2025
- [735 12th St](https://nearbypermits.com/boulder/address/735-12th-st/): newest permit Oct 18, 2024
- [728 12th St](https://nearbypermits.com/boulder/address/728-12th-st/): newest permit Aug 8, 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 15:09 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/840-12th-st/