# Building permits at 665 Maxwell Ave, Boulder, CO 16 permits on record here. The newest, Oct 27, 2025: The project involves renovating the existing basement and adding an 80-square-foot rear entry. 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 | |---|---|---|---|---| | Oct 27, 2025 | Addition | The project involves renovating the existing basement and adding an 80-square-foot rear entry. The basement floor will be excavated approximately three feet to achieve a 10-foot ceiling height, requiring foundation reinforcement. The electrical panel will be relocated, and the existing HVAC system w | $225,500 | [BLD-SFD2025-00089](https://nearbypermits.com/boulder/permit/BLD-SFD2025-00089/) | | Jan 28, 2019 | Roofing | *Total tear off and re-roof of 26 squares with Owens Corning Storm on 10:12. LAC issued for re-roof house with OC Strom "driftwood" asphalt shingles as detailed on landmark alteration certificate application dated 11.07.2018. | $11,462 | [RFG2018-00841](https://nearbypermits.com/boulder/permit/RFG2018-00841/) | | Oct 24, 2013 | Mechanical (HVAC) | Interior remodel including removal of wall separating living and dining rooms and installation of an EPA phase II certified wood burning fireplace and associated flue. | Not listed | [PMT2013-04914-MEC](https://nearbypermits.com/boulder/permit/PMT2013-04914-MEC/) | | Oct 24, 2013 | Electrical | Interior remodel including removal of wall separating living and dining rooms and installation of an EPA phase II certified wood burning fireplace and associated flue. | $100 | [PMT2013-04914-ELE](https://nearbypermits.com/boulder/permit/PMT2013-04914-ELE/) | | Oct 24, 2013 | Alteration or repair | Interior remodel including removal of wall separating living and dining rooms and installation of an EPA phase II certified wood burning fireplace and associated flue. | $7,800 | [PMT2013-04914](https://nearbypermits.com/boulder/permit/PMT2013-04914/) | | Oct 4, 2012 | Mechanical (HVAC) | Installation of a whole house fan in a SFD -- includes associated electrical. Fan terminates in the attic area and there will not be any changes to exterior (historic district). | $1,460 | [PMT2012-04844-MEC](https://nearbypermits.com/boulder/permit/PMT2012-04844-MEC/) | | Oct 4, 2012 | Electrical | Installation of a whole house fan in a SFD -- includes associated electrical. Fan terminates in the attic area and there will not be any changes to exterior (historic district). | $300 | [PMT2012-04844-ELE](https://nearbypermits.com/boulder/permit/PMT2012-04844-ELE/) | | Jan 23, 2004 | Fence, wall or deck | Repairs to existing fence near driveway and in back yard which isa apprx 6' high, new white picket fence 3' maximum around street sides of property. All work per HIS 2004-00007. | $600 | [PMT2004-00275-FEN](https://nearbypermits.com/boulder/permit/PMT2004-00275-FEN/) | | Jun 2, 2003 | Addition | Repair porch on east side of house, new dormer on west facade.See HIS2003-00109 for Landmarks approval. | $5,800 | [PMT2003-01918](https://nearbypermits.com/boulder/permit/PMT2003-01918/) | | Mar 25, 2003 | Plumbing | Interior remodel and exterior alterations. Restore/repair front/south facade including removal of walkout deck and door to it, additon of new windows. Interior remodel is a conversion from duplex to single family detached dwelling. See HIS2003-00059 for Landmarks approval. | $5,500 | [PMT2003-00916-PLB](https://nearbypermits.com/boulder/permit/PMT2003-00916-PLB/) | | Mar 25, 2003 | Mechanical (HVAC) | Interior remodel and exterior alterations. Restore/repair front/south facade including removal of walkout deck and door to it, additon of new windows. Interior remodel is a conversion from duplex to single family detached dwelling. See HIS2003-00059 for Landmarks approval. | $5,000 | [PMT2003-00916-MEC](https://nearbypermits.com/boulder/permit/PMT2003-00916-MEC/) | | Mar 25, 2003 | Electrical | Interior remodel and exterior alterations. Restore/repair front/south facade including removal of walkout deck and door to it, additon of new windows. Interior remodel is a conversion from duplex to single family detached dwelling. See HIS2003-00059 for Landmarks approval. | $3,500 | [PMT2003-00916-ELE](https://nearbypermits.com/boulder/permit/PMT2003-00916-ELE/) | | Mar 25, 2003 | Alteration or repair | Interior remodel and exterior alterations. Restore/repair front/south facade including removal of walkout deck and door to it, additon of new windows. Interior remodel is a conversion from duplex to single family detached dwelling. See HIS2003-00059 for Landmarks approval. | $82,000 | [PMT2003-00916](https://nearbypermits.com/boulder/permit/PMT2003-00916/) | | May 15, 1989 | Electrical | Electrical rewire basement | $500 | [PMT1989-P2548-ELE](https://nearbypermits.com/boulder/permit/PMT1989-P2548-ELE/) | | Jan 17, 1989 | Mechanical (HVAC) | Mechanical gas line repair | $394 | [PMT1989-P0177-MEC](https://nearbypermits.com/boulder/permit/PMT1989-P0177-MEC/) | | Jan 6, 1989 | Mechanical (HVAC) | Mechanical replace f a furnace | $2,395 | [PMT1989-N8171-MEC](https://nearbypermits.com/boulder/permit/PMT1989-N8171-MEC/) | ## More on this street Other addresses on Maxwell Ave with permits, nearest house number first: - [661 Maxwell Ave](https://nearbypermits.com/boulder/address/661-maxwell-ave/): newest permit Jun 26, 2026 - [628 Maxwell Ave](https://nearbypermits.com/boulder/address/628-maxwell-ave/): newest permit Dec 5, 2025 - [624 Maxwell Ave](https://nearbypermits.com/boulder/address/624-maxwell-ave/): newest permit May 23, 2025 - [707 Maxwell Ave](https://nearbypermits.com/boulder/address/707-maxwell-ave/): newest permit Nov 19, 2025 - [621 Maxwell Ave](https://nearbypermits.com/boulder/address/621-maxwell-ave/): newest permit May 12, 2025 - [716 Maxwell Ave](https://nearbypermits.com/boulder/address/716-maxwell-ave/): newest permit Oct 14, 2025 - [611 Maxwell Ave](https://nearbypermits.com/boulder/address/611-maxwell-ave/): newest permit Feb 18, 2026 - [541 Maxwell Ave](https://nearbypermits.com/boulder/address/541-maxwell-ave/): newest permit Apr 11, 2025 - [536 Maxwell Ave](https://nearbypermits.com/boulder/address/536-maxwell-ave/): newest permit Apr 17, 2025 - [527 Maxwell Ave](https://nearbypermits.com/boulder/address/527-maxwell-ave/): newest permit Apr 11, 2025 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-06 15:22 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 16 permits at this address: https://nearbypermits.com/boulder/address/665-maxwell-ave/