# Building permits at 3141 9th St, Boulder, CO 17 permits on record here. The newest, Aug 28: Installing 2 new heat pump mini split systems. 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, 2026 | Mechanical (HVAC) | Installing 2 new heat pump mini split systems. One with two heads and the other with one head 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 prov | $29,527 | [MEC2026-01564](https://nearbypermits.com/boulder/permit/MEC2026-01564/) | | Jul 9, 2020 | Roofing | *Total tear-off & reroof of SFD, 17 squares of dimensional shingles on a pitch represented as 3/12. 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 | $5,114 | [RFG2020-00499](https://nearbypermits.com/boulder/permit/RFG2020-00499/) | | Feb 24, 2015 | Plumbing | Additions to replace an existing office footprint to allow for a new crawl space and foundation for a new office and additional mudroom and larger master bedroom (472 sq.ft.). Remodel work of 24 sq.ft. also included. Scope of work includes associated MEPs to include a new utility sink and extension | $2,000 | [PMT2014-05420-PLB](https://nearbypermits.com/boulder/permit/PMT2014-05420-PLB/) | | Feb 24, 2015 | Mechanical (HVAC) | Additions to replace an existing office footprint to allow for a new crawl space and foundation for a new office and additional mudroom and larger master bedroom (472 sq.ft.). Remodel work of 24 sq.ft. also included. Scope of work includes associated MEPs to include a new utility sink and extension | $1,500 | [PMT2014-05420-MEC](https://nearbypermits.com/boulder/permit/PMT2014-05420-MEC/) | | Feb 24, 2015 | Electrical | Additions to replace an existing office footprint to allow for a new crawl space and foundation for a new office and additional mudroom and larger master bedroom (472 sq.ft.). Remodel work of 24 sq.ft. also included. Scope of work includes associated MEPs to include a new utility sink and extension | $5,000 | [PMT2014-05420-ELE](https://nearbypermits.com/boulder/permit/PMT2014-05420-ELE/) | | Feb 24, 2015 | Addition | Additions to replace an existing office footprint to allow for a new crawl space and foundation for a new office and additional mudroom and larger master bedroom (472 sq.ft.). Remodel work of 24 sq.ft. also included. Scope of work includes associated MEPs to include a new utility sink and extension | $150,000 | [PMT2014-05420](https://nearbypermits.com/boulder/permit/PMT2014-05420/) | | Sep 18, 2001 | Plumbing | Construction of new detached 2 car garage w/ studio and half bath above.(Applicant must sign and record Declaration of Use befor issuance of permit) | $2,000 | [PMT2001-01091-PLB](https://nearbypermits.com/boulder/permit/PMT2001-01091-PLB/) | | Sep 18, 2001 | Mechanical (HVAC) | Construction of new detached 2 car garage w/ studio and half bath above.(Applicant must sign and record Declaration of Use befor issuance of permit) | $1,000 | [PMT2001-01091-MEC](https://nearbypermits.com/boulder/permit/PMT2001-01091-MEC/) | | Sep 18, 2001 | Electrical | Construction of new detached 2 car garage w/ studio and half bath above.(Applicant must sign and record Declaration of Use befor issuance of permit) | $500 | [PMT2001-01091-ELE](https://nearbypermits.com/boulder/permit/PMT2001-01091-ELE/) | | Sep 18, 2001 | New building | Construction of new detached 2 car garage w/ studio and half bath above.(Applicant must sign and record Declaration of Use befor issuance of permit) | $19,000 | [PMT2001-01091](https://nearbypermits.com/boulder/permit/PMT2001-01091/) | | Dec 31, 1999 | Mechanical (HVAC) | remodel garage into office | $200 | [PMT2000-00109-MEC](https://nearbypermits.com/boulder/permit/PMT2000-00109-MEC/) | | Dec 31, 1999 | Electrical | remodel garage into office | $100 | [PMT2000-00109-ELE](https://nearbypermits.com/boulder/permit/PMT2000-00109-ELE/) | | Dec 31, 1999 | Alteration or repair | remodel garage into office | $1,500 | [PMT2000-00109](https://nearbypermits.com/boulder/permit/PMT2000-00109/) | | Aug 11, 1999 | Plumbing | Addition and remodel. Combines electrical # 996759, plumbing # 996757, and mechanical # 996761 with general permit. | $6,000 | [PMT1999-06756-PLB](https://nearbypermits.com/boulder/permit/PMT1999-06756-PLB/) | | Aug 11, 1999 | Mechanical (HVAC) | Addition and remodel. Combines electrical # 996759, plumbing # 996757, and mechanical # 996761 with general permit. | $9,000 | [PMT1999-06756-MEC](https://nearbypermits.com/boulder/permit/PMT1999-06756-MEC/) | | Aug 11, 1999 | Electrical | Addition and remodel. Combines electrical # 996759, plumbing # 996757, and mechanical # 996761 with general permit. | $8,000 | [PMT1999-06756-ELE](https://nearbypermits.com/boulder/permit/PMT1999-06756-ELE/) | | Aug 11, 1999 | Addition | Addition and remodel. Combines electrical # 996759, plumbing # 996757, and mechanical # 996761 with general permit. | $140,000 | [PMT1999-06756](https://nearbypermits.com/boulder/permit/PMT1999-06756/) | ## More on this street Other addresses on 9th St with permits, nearest house number first: - [3136 9th St](https://nearbypermits.com/boulder/address/3136-9th-st/): newest permit May 28, 2026 - [3153 9th St](https://nearbypermits.com/boulder/address/3153-9th-st/): newest permit Apr 1, 2025 - [3156 9th St](https://nearbypermits.com/boulder/address/3156-9th-st/): newest permit May 27, 2026 - [3119 9th St](https://nearbypermits.com/boulder/address/3119-9th-st/): newest permit Dec 2, 2025 - [3188 9th St](https://nearbypermits.com/boulder/address/3188-9th-st/): newest permit Nov 27, 2024 - [3055 9th St](https://nearbypermits.com/boulder/address/3055-9th-st/): newest permit Mar 23, 2026 - [3227 9th St](https://nearbypermits.com/boulder/address/3227-9th-st/): newest permit Jan 30, 2026 - [3228 9th St](https://nearbypermits.com/boulder/address/3228-9th-st/): newest permit Sep 26, 2025 - [3048 9th St](https://nearbypermits.com/boulder/address/3048-9th-st/): newest permit Apr 23, 2026 - [3236 9th St](https://nearbypermits.com/boulder/address/3236-9th-st/): newest permit Sep 3, 2025 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-06 19:29 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 17 permits at this address: https://nearbypermits.com/boulder/address/3141-9th-st/