# Building permits at 310 28th St, Boulder, CO 13 permits on record here. The newest, Apr 20: Installing a 2.5 ton ducted Mitsubishi heat pump PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING. 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 | |---|---|---|---|---| | Apr 20, 2026 | Mechanical (HVAC) | Installing a 2.5 ton ducted Mitsubishi heat pump PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plastic glued vents for fuel burning appliances must undergo pressure testing. To facilitate the inspection process, please provide photographic evidence of the pressure tes | $10,125 | [MEC2026-00614](https://nearbypermits.com/boulder/permit/MEC2026-00614/) | | Mar 1, 2021 | Plumbing | *New construction of a 354 sqft detached ADU. Approved per AUR2020-00043. | $5,000 | [PLB2020-00709](https://nearbypermits.com/boulder/permit/PLB2020-00709/) | | Mar 1, 2021 | Mechanical (HVAC) | *New construction of a 354 sqft detached ADU. Approved per AUR2020-00043. | $3,000 | [MEC2020-01736](https://nearbypermits.com/boulder/permit/MEC2020-01736/) | | Mar 1, 2021 | Electrical | *New construction of a 354 sqft detached ADU. Approved per AUR2020-00043. | $5,000 | [ELE2020-01532](https://nearbypermits.com/boulder/permit/ELE2020-01532/) | | Mar 1, 2021 | New building | *New construction of a 354 sqft detached ADU. Approved per AUR2020-00043. | $50,000 | [BLD-ACC2020-00168](https://nearbypermits.com/boulder/permit/BLD-ACC2020-00168/) | | Feb 22, 2021 | Fire systems | New Plumis Mist System installation for an ADU. See BLD-ACC2020-00168 for general building permit. Ottersberg | $3,500 | [FIR2021-00064](https://nearbypermits.com/boulder/permit/FIR2021-00064/) | | Feb 17, 2016 | Fence, wall or deck | Replacement of some existing fence and addition of new fencing enclosing rear yard of single family dwelling. | $2,618 | [PMT2016-00652-FEN](https://nearbypermits.com/boulder/permit/PMT2016-00652-FEN/) | | Nov 15, 2012 | Plumbing | Addition and remodel of existing single family residence to add 150 square feet and remodel 1,023 square feet on first floor. Addition of 647 square feet on second floor for 2 new bedrooms and new bath. Includes associated electrical, mechanical, and plumbing. | $10,800 | [PMT2012-04885-PLB](https://nearbypermits.com/boulder/permit/PMT2012-04885-PLB/) | | Nov 15, 2012 | Mechanical (HVAC) | Addition and remodel of existing single family residence to add 150 square feet and remodel 1,023 square feet on first floor. Addition of 647 square feet on second floor for 2 new bedrooms and new bath. Includes associated electrical, mechanical, and plumbing. | $8,000 | [PMT2012-04885-MEC](https://nearbypermits.com/boulder/permit/PMT2012-04885-MEC/) | | Nov 15, 2012 | Electrical | Addition and remodel of existing single family residence to add 150 square feet and remodel 1,023 square feet on first floor. Addition of 647 square feet on second floor for 2 new bedrooms and new bath. Includes associated electrical, mechanical, and plumbing. | $11,000 | [PMT2012-04885-ELE](https://nearbypermits.com/boulder/permit/PMT2012-04885-ELE/) | | Nov 15, 2012 | Addition | Addition and remodel of existing single family residence to add 150 square feet and remodel 1,023 square feet on first floor. Addition of 647 square feet on second floor for 2 new bedrooms and new bath. Includes associated electrical, mechanical, and plumbing. | $249,787 | [PMT2012-04885](https://nearbypermits.com/boulder/permit/PMT2012-04885/) | | May 28, 2004 | Electrical | Upgrade electrical service for single-family residence to 200 amp service. | $1,200 | [PMT2004-02057-ELE](https://nearbypermits.com/boulder/permit/PMT2004-02057-ELE/) | | Apr 6, 1988 | Roofing | Roofing REROOF | $643 | [PMT1988-N7404-RFG](https://nearbypermits.com/boulder/permit/PMT1988-N7404-RFG/) | ## More on this street Other addresses on 28th St with permits, nearest house number first: - [325 28th St](https://nearbypermits.com/boulder/address/325-28th-st/): newest permit Jan 3, 2025 - [350 28th St](https://nearbypermits.com/boulder/address/350-28th-st/): newest permit Nov 25, 2024 - [250 28th St](https://nearbypermits.com/boulder/address/250-28th-st/): newest permit Sep 22, 2025 - [395 28th St](https://nearbypermits.com/boulder/address/395-28th-st/): newest permit Apr 4, 2025 - [220 28th St](https://nearbypermits.com/boulder/address/220-28th-st/): newest permit Aug 5, 2025 - [215 28th St](https://nearbypermits.com/boulder/address/215-28th-st/): newest permit Oct 16, 2024 - [214 28th St](https://nearbypermits.com/boulder/address/214-28th-st/): newest permit Nov 13, 2025 - [770 28th St](https://nearbypermits.com/boulder/address/770-28th-st/): newest permit May 29, 2026 - [820 28th St 213](https://nearbypermits.com/boulder/address/820-28th-st-213/): newest permit Jul 10, 2026 - [910 28th St 213](https://nearbypermits.com/boulder/address/910-28th-st-213/): newest permit Apr 21, 2026 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 03:10 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 13 permits at this address: https://nearbypermits.com/boulder/address/310-28th-st/