# Building permits at 740 S 42nd St, Boulder, CO 11 permits on record here. The newest, Jul 18, 2025: Replace water heater - new 40 gal gas water heater (40MBH/0.62UEF). 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 | |---|---|---|---|---| | Jul 18, 2025 | Mechanical (HVAC) | Replace water heater - new 40 gal gas water heater (40MBH/0.62UEF) | $3,400 | [MEC2025-01125](https://nearbypermits.com/boulder/permit/MEC2025-01125/) | | Mar 10, 2023 | Alteration or repair | Basement remodel of ~ 986 S.F. with the addition of one new bedroom and egress window well. There is no scope of work on 1st floor except for the installation of spray foam on exterior walls to achieve more efficient thermal envelope. The existing above-grade exterior walls do not currently have ins | $150,000 | [BLD-SFD2022-00434](https://nearbypermits.com/boulder/permit/BLD-SFD2022-00434/) | | Nov 2, 2018 | Mechanical (HVAC) | *Voided for inactivity due to no inspections performed within 180 days of issuance.*Installation of a replacement central a/c and furnace. A/C is 24,000 Btu/h and 13 SEER, furnace is 90,000 Btu/h AFUE 80%. | $4,600 | [MEC2018-01310](https://nearbypermits.com/boulder/permit/MEC2018-01310/) | | Jul 26, 2010 | Plumbing | Basement finish of approximately 1100 square feet. To include two bedrooms and one bathroom. Egress windows installed through PMT2010-00925. | $2,000 | [PMT2010-03066-PLB](https://nearbypermits.com/boulder/permit/PMT2010-03066-PLB/) | | Jul 26, 2010 | Mechanical (HVAC) | Basement finish of approximately 1100 square feet. To include two bedrooms and one bathroom. Egress windows installed through PMT2010-00925. | $500 | [PMT2010-03066-MEC](https://nearbypermits.com/boulder/permit/PMT2010-03066-MEC/) | | Jul 26, 2010 | Electrical | Basement finish of approximately 1100 square feet. To include two bedrooms and one bathroom. Egress windows installed through PMT2010-00925. | $500 | [PMT2010-03066-ELE](https://nearbypermits.com/boulder/permit/PMT2010-03066-ELE/) | | Jul 26, 2010 | Alteration or repair | Basement finish of approximately 1100 square feet. To include two bedrooms and one bathroom. Egress windows installed through PMT2010-00925. | $66,407 | [PMT2010-03066](https://nearbypermits.com/boulder/permit/PMT2010-03066/) | | Mar 12, 2010 | Alteration or repair | Installation of two egress windows in the basement by saw-cutting concrete 20" down form existing openings 29.5" wide. No increase in width allowed without re-application and supplemental stamped engineering documents.. | $2,900 | [PMT2010-00925](https://nearbypermits.com/boulder/permit/PMT2010-00925/) | | Sep 14, 2001 | Electrical | Service change to 150 amps. | $1,200 | [PMT2001-04049-ELE](https://nearbypermits.com/boulder/permit/PMT2001-04049-ELE/) | | Jul 31, 2001 | Mechanical (HVAC) | Installing a new comfort cooling system and replacing a forced air furnace. | $2,243 | [PMT2001-03317-MEC](https://nearbypermits.com/boulder/permit/PMT2001-03317-MEC/) | | Jul 31, 2001 | Electrical | Installing a new comfort cooling system and replacing a forced air furnace. | $203 | [PMT2001-03317-ELE](https://nearbypermits.com/boulder/permit/PMT2001-03317-ELE/) | ## 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: - [760 S 42nd St](https://nearbypermits.com/boulder/address/760-s-42nd-st/): newest permit Jan 16, 2026 - [720 S 42nd St](https://nearbypermits.com/boulder/address/720-s-42nd-st/): newest permit Jun 18, 2025 - [660 S 42nd St](https://nearbypermits.com/boulder/address/660-s-42nd-st/): newest permit Apr 24, 2026 - [655 S 42nd St](https://nearbypermits.com/boulder/address/655-s-42nd-st/): newest permit Mar 20, 2025 - [645 S 42nd St](https://nearbypermits.com/boulder/address/645-s-42nd-st/): newest permit Jun 12, 2025 - [640 S 42nd St](https://nearbypermits.com/boulder/address/640-s-42nd-st/): newest permit Aug 5, 2026 - [620 S 42nd St](https://nearbypermits.com/boulder/address/620-s-42nd-st/): newest permit Aug 6, 2026 - [615 S 42nd St](https://nearbypermits.com/boulder/address/615-s-42nd-st/): newest permit Jan 22, 2026 - [550 S 42nd St](https://nearbypermits.com/boulder/address/550-s-42nd-st/): newest permit Jun 22, 2026 - [545 S 42nd St](https://nearbypermits.com/boulder/address/545-s-42nd-st/): newest permit Sep 1, 2026 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-14 11:49 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 11 permits at this address: https://nearbypermits.com/boulder/address/740-s-42nd-st/