# Building permits at 550 S 42nd St, Boulder, CO 12 permits on record here. The newest, Jun 22: Adding 9.3kWDC to existing solar system not making any AC side changes. 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 | |---|---|---|---|---| | Jun 22, 2026 | Electrical | Adding 9.3kWDC to existing solar system not making any AC side changes. | $20,000 | [ELE2026-00506](https://nearbypermits.com/boulder/permit/ELE2026-00506/) | | Oct 14, 2025 | Electrical | Install 4.1kW roof mounted solar PV system with 13.5kWh Tesla Powerwall Energy Storage System and (1) Tesla Wall Connector | $45,389 | [ELE2025-01012](https://nearbypermits.com/boulder/permit/ELE2025-01012/) | | Apr 28, 2025 | Mechanical (HVAC) | Replacement of a mitsubishi mini-split system and Lunos HRV system 8/18/25 Water heater replacement verified in scope (permit includes new water heater). | $30,000 | [MEC2025-00655](https://nearbypermits.com/boulder/permit/MEC2025-00655/) | | Apr 24, 2025 | Electrical | Upgrade electrical service to a 200A and move from current location already approved by Excel to be moved. | $5,180 | [ELE2025-00310](https://nearbypermits.com/boulder/permit/ELE2025-00310/) | | Jun 27, 2024 | Alteration or repair | Remove steel siding apply Fire-Resistant Stucco. | $18,000 | [SDG2024-00003](https://nearbypermits.com/boulder/permit/SDG2024-00003/) | | Jun 27, 2024 | Alteration or repair | Remodel of existing kitchen, bathroom, living/dining area. Remodel main level recreation room to a master suite; Bedroom, closet and bath Adding to existing deck in back | $115,000 | [BLD-SFD2024-00059](https://nearbypermits.com/boulder/permit/BLD-SFD2024-00059/) | | Feb 2, 2024 | Mechanical (HVAC) | replace old ac unit with new 3Ton 16 SEER ac | $2,742 | [MEC2024-00170](https://nearbypermits.com/boulder/permit/MEC2024-00170/) | | Dec 29, 2023 | Mechanical (HVAC) | VOID-180 Days no activity replace old ac with new 16 SEER 3 ton ac | $2,742 | [MEC2023-01950](https://nearbypermits.com/boulder/permit/MEC2023-01950/) | | Jul 10, 2019 | Mechanical (HVAC) | *Replace water heater with 40 gallon 40k btu unit | $2,535 | [MEC2019-01039](https://nearbypermits.com/boulder/permit/MEC2019-01039/) | | Jul 13, 2012 | Roofing | Total tear off and reroof of existing single family dwelling. OC Duration Storm shingles, 23 squares, 4/12 pitch as indicated on permit application. | $8,680 | [PMT2012-03391-RFG](https://nearbypermits.com/boulder/permit/PMT2012-03391-RFG/) | | Nov 15, 2010 | Mechanical (HVAC) | Replacement Forced Air Furnace | $3,490 | [PMT2010-20413-MEC](https://nearbypermits.com/boulder/permit/PMT2010-20413-MEC/) | | May 11, 2001 | Mechanical (HVAC) | New water heater. | $300 | [PMT2001-01875-MEC](https://nearbypermits.com/boulder/permit/PMT2001-01875-MEC/) | ## 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 - [540 S 42nd St](https://nearbypermits.com/boulder/address/540-s-42nd-st/): newest permit Sep 4, 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 - [655 S 42nd St](https://nearbypermits.com/boulder/address/655-s-42nd-st/): newest permit Mar 20, 2025 - [660 S 42nd St](https://nearbypermits.com/boulder/address/660-s-42nd-st/): newest permit Apr 24, 2026 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-11 19:03 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 12 permits at this address: https://nearbypermits.com/boulder/address/550-s-42nd-st/