# Building permits at 640 S 42nd St, Boulder, CO

Five permits on record here. The newest, Aug 5: Replacing our outdated 100 amp Stab-loc electrical panel with a 200 amp modern panel. 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| Aug 5, 2026 | Electrical | Replacing our outdated 100 amp Stab-loc electrical panel with a 200 amp modern panel. | Not listed | [ELE2026-00842](https://nearbypermits.com/boulder/permit/ELE2026-00842/) |
| Jan 27, 2026 | Mechanical (HVAC) | swapping like for like 50 gallon/40k btu natural gas 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 | $5,993 | [MEC2026-00102](https://nearbypermits.com/boulder/permit/MEC2026-00102/) |
| Jan 27, 2026 | Mechanical (HVAC) | replace furnace only: located in basement 2 stage VS 80% eff/70k btu 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 | $13,699 | [MEC2026-00087](https://nearbypermits.com/boulder/permit/MEC2026-00087/) |
| Oct 17, 2025 | Roofing | Mid-roof inspection is required if 1) pitch is less than 4/12 or 2) for any roof type other than asphalt shingles (regardless of pitch). For roof/attic assemblies requiring 1/150 ventilation, include a calculation detailing the quantity of intake and exhaust vents demonstrating 1/150 venting ratio c | $15,225 | [RFG2025-00830](https://nearbypermits.com/boulder/permit/RFG2025-00830/) |
| Aug 14, 2013 | Alteration or repair | Installation of two new egress windows to replace existing basement windows. 30"x48" casement; 4'x3'x5' well with ladder and grate. | $5,400 | [PMT2013-03986](https://nearbypermits.com/boulder/permit/PMT2013-03986/) |

## 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:

- [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
- [620 S 42nd St](https://nearbypermits.com/boulder/address/620-s-42nd-st/): newest permit Aug 6, 2026
- [660 S 42nd St](https://nearbypermits.com/boulder/address/660-s-42nd-st/): newest permit Apr 24, 2026
- [615 S 42nd St](https://nearbypermits.com/boulder/address/615-s-42nd-st/): newest permit Jan 22, 2026
- [720 S 42nd St](https://nearbypermits.com/boulder/address/720-s-42nd-st/): newest permit Jun 18, 2025
- [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
- [540 S 42nd St](https://nearbypermits.com/boulder/address/540-s-42nd-st/): newest permit Sep 4, 2026
- [740 S 42nd St](https://nearbypermits.com/boulder/address/740-s-42nd-st/): newest permit Jul 18, 2025

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-08 22:25 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 5 permits at this address: https://nearbypermits.com/boulder/address/640-s-42nd-st/