# Building permits at 520 S 42nd St, Boulder, CO

Nine permits on record here. The newest, May 14: All Structures must be permitted separately Total tear-off & reroof of SFD. 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 |
|---|---|---|---|---|
| May 14, 2026 | Roofing | All Structures must be permitted separately Total tear-off & reroof of SFD, 22 squares of dimensional shingles on a pitch represented as 4/12. All roof materials shall be installed per manufacturer?s specs. Mid-roof inspection is required if 1) pitch is less than 4/12 or 2) for any roof type other t | $15,465 | [RFG2026-00444](https://nearbypermits.com/boulder/permit/RFG2026-00444/) |
| Feb 7, 2022 | Plumbing | Kitchen remodel of 240 sf. Full bathroom remodel to 3/4 bathroom of 34 sf. Half bathroom remodel to 3/4 bathroom of 48 sf. Existing Basement Laundry/bathroom (of 150sf) remodeled to, 3/4 bathroom of 35 sf, a laundry room of 70sf, and 2 storage rooms of 20 & 6 sf. Basement storage area enclosure of 3 | $8,500 | [PLB2021-00131](https://nearbypermits.com/boulder/permit/PLB2021-00131/) |
| Feb 7, 2022 | Electrical | Kitchen remodel of 240 sf. Full bathroom remodel to 3/4 bathroom of 34 sf. Half bathroom remodel to 3/4 bathroom of 48 sf. Existing Basement Laundry/bathroom (of 150sf) remodeled to, 3/4 bathroom of 35 sf, a laundry room of 70sf, and 2 storage rooms of 20 & 6 sf. Basement storage area enclosure of 3 | $3,500 | [ELE2021-00348](https://nearbypermits.com/boulder/permit/ELE2021-00348/) |
| Feb 7, 2022 | Alteration or repair | Kitchen remodel of 240 sf. Full bathroom remodel to 3/4 bathroom of 34 sf. Half bathroom remodel to 3/4 bathroom of 48 sf. Existing Basement Laundry/bathroom (of 150sf) remodeled to, 3/4 bathroom of 35 sf, a laundry room of 70sf, and 2 storage rooms of 20 & 6 sf. Basement storage area enclosure of 3 | $70,000 | [BLD-SFD2021-00099](https://nearbypermits.com/boulder/permit/BLD-SFD2021-00099/) |
| Nov 4, 2010 | Roofing | Total tear off and reroof of existing single family dwelling. Lamintated 30-yr composite shingles, 21.67 squares, 5/12 pitch as indicated on permit application. | $7,157 | [PMT2010-04865-RFG](https://nearbypermits.com/boulder/permit/PMT2010-04865-RFG/) |
| Jul 31, 2009 | Mechanical (HVAC) | Basement Finish - To include: office, rec room, and work area. Also, new egreess window, new furnace, new water heater, and upgrade to service panel. | $4,900 | [PMT2009-02980-MEC](https://nearbypermits.com/boulder/permit/PMT2009-02980-MEC/) |
| Jul 31, 2009 | Electrical | Basement Finish - To include: office, rec room, and work area. Also, new egreess window, new furnace, new water heater, and upgrade to service panel. | $4,300 | [PMT2009-02980-ELE](https://nearbypermits.com/boulder/permit/PMT2009-02980-ELE/) |
| Jul 31, 2009 | Alteration or repair | Basement Finish - To include: office, rec room, and work area. Also, new egreess window, new furnace, new water heater, and upgrade to service panel. | $61,382 | [PMT2009-02980](https://nearbypermits.com/boulder/permit/PMT2009-02980/) |
| Jun 2, 2004 | New building | 120 square foot front porch cover in front yard setback. Must meet BRC 9-3.2-15. Shingles to match existing house. | $2,291 | [PMT2004-02104](https://nearbypermits.com/boulder/permit/PMT2004-02104/) |

## 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:

- [530 S 42nd St](https://nearbypermits.com/boulder/address/530-s-42nd-st/): newest permit Mar 17, 2026
- [540 S 42nd St](https://nearbypermits.com/boulder/address/540-s-42nd-st/): newest permit Sep 4, 2026
- [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
- [430 S 42nd St](https://nearbypermits.com/boulder/address/430-s-42nd-st/): newest permit May 22, 2026
- [615 S 42nd St](https://nearbypermits.com/boulder/address/615-s-42nd-st/): newest permit Jan 22, 2026
- [425 S 42nd St](https://nearbypermits.com/boulder/address/425-s-42nd-st/): newest permit Oct 24, 2025
- [620 S 42nd St](https://nearbypermits.com/boulder/address/620-s-42nd-st/): newest permit Aug 6, 2026
- [420 S 42nd St](https://nearbypermits.com/boulder/address/420-s-42nd-st/): newest permit Mar 4, 2025
- [640 S 42nd St](https://nearbypermits.com/boulder/address/640-s-42nd-st/): newest permit Aug 5, 2026

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-10 00:10 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 9 permits at this address: https://nearbypermits.com/boulder/address/520-s-42nd-st/