# Building permits at 540 S 42nd St, Boulder, CO 10 permits on record here. The newest, Sep 4: 50-Gal. Tall 12-Year 40000-BTU Nat. 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 4, 2026 | Plumbing | 50-Gal. Tall 12-Year 40000-BTU Nat. Gas UNL Water Heater 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 pres | $3,631 | [MEC2026-01660](https://nearbypermits.com/boulder/permit/MEC2026-01660/) | | Mar 19, 2024 | Mechanical (HVAC) | install replacement 96% 70k btu furnace | $8,560 | [MEC2024-00370](https://nearbypermits.com/boulder/permit/MEC2024-00370/) | | Jul 10, 2012 | Plumbing | Basement finish of approximately 850 square feet. Two include two bedrooms, bathroom, living room and finished storage area. | Not listed | [PMT2012-03320-PLB](https://nearbypermits.com/boulder/permit/PMT2012-03320-PLB/) | | Jul 10, 2012 | Mechanical (HVAC) | Basement finish of approximately 850 square feet. Two include two bedrooms, bathroom, living room and finished storage area. | Not listed | [PMT2012-03320-MEC](https://nearbypermits.com/boulder/permit/PMT2012-03320-MEC/) | | Jul 10, 2012 | Electrical | Basement finish of approximately 850 square feet. Two include two bedrooms, bathroom, living room and finished storage area. | Not listed | [PMT2012-03320-ELE](https://nearbypermits.com/boulder/permit/PMT2012-03320-ELE/) | | Jul 10, 2012 | Alteration or repair | Basement finish of approximately 850 square feet. Two include two bedrooms, bathroom, living room and finished storage area. | $69,981 | [PMT2012-03320](https://nearbypermits.com/boulder/permit/PMT2012-03320/) | | Nov 17, 2011 | Alteration or repair | Installation of two egress windows & egress window wells on the west elevation of the structure -- see ewnclosed engineer's letter & drawing for specific details. | $4,500 | [PMT2011-05053](https://nearbypermits.com/boulder/permit/PMT2011-05053/) | | Jan 18, 2011 | Fence, wall or deck | Replacement 6 foot high cedar privacy fence in rear yard. | $4,300 | [PMT2011-00239-FEN](https://nearbypermits.com/boulder/permit/PMT2011-00239-FEN/) | | Sep 11, 2009 | Electrical | Residential service change, 200 amps. | $1,200 | [PMT2009-03641-ELE](https://nearbypermits.com/boulder/permit/PMT2009-03641-ELE/) | | Feb 25, 2008 | Roofing | Roofing permit for total tear off and overlay of 20 squares at 5:12 pitch. | $3,810 | [PMT2008-00664-RFG](https://nearbypermits.com/boulder/permit/PMT2008-00664-RFG/) | ## Zoning requests nearby We don't list zoning cases for Boulder yet. Look them up on the city's Board of Zoning Adjustment page: https://bouldercolorado.gov/government/board-commission/board-zoning-adjustment ## More on this street Other addresses on S 42nd St with permits, nearest house number first: - [545 S 42nd St](https://nearbypermits.com/boulder/address/545-s-42nd-st/): newest permit Sep 1, 2026 - [550 S 42nd St](https://nearbypermits.com/boulder/address/550-s-42nd-st/): newest permit Jun 22, 2026 - [530 S 42nd St](https://nearbypermits.com/boulder/address/530-s-42nd-st/): newest permit Mar 17, 2026 - [520 S 42nd St](https://nearbypermits.com/boulder/address/520-s-42nd-st/): newest permit May 14, 2026 - [615 S 42nd St](https://nearbypermits.com/boulder/address/615-s-42nd-st/): newest permit Jan 22, 2026 - [620 S 42nd St](https://nearbypermits.com/boulder/address/620-s-42nd-st/): newest permit Aug 6, 2026 - [640 S 42nd St](https://nearbypermits.com/boulder/address/640-s-42nd-st/): newest permit Aug 5, 2026 - [645 S 42nd St](https://nearbypermits.com/boulder/address/645-s-42nd-st/): newest permit Jun 12, 2025 - [430 S 42nd St](https://nearbypermits.com/boulder/address/430-s-42nd-st/): newest permit May 22, 2026 - [655 S 42nd St](https://nearbypermits.com/boulder/address/655-s-42nd-st/): newest permit Mar 20, 2025 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-09 18:47 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 10 permits at this address: https://nearbypermits.com/boulder/address/540-s-42nd-st/