# Building permits at 435 S 43rd St, Boulder, CO

Two permits here in the last two years. The newest, Sep 14: 3 ton electric heat pump installation replacing an existing gas furnace. 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 14, 2026 | Mechanical (HVAC) | 3 ton electric heat pump installation replacing an existing gas furnace. The gas line will be capped at the removed furnace location. Need to disconnect the electrical from the old HVAC and connect it to the new HVAC. PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plas | $18,210 | [MEC2026-01676](https://nearbypermits.com/boulder/permit/MEC2026-01676/) |
| Sep 1, 2026 | Electrical | Upgrade Electrical Panel to 200 amp, over head. | $4,800 | [ELE2026-00929](https://nearbypermits.com/boulder/permit/ELE2026-00929/) |

## More on this street

Other addresses on S 43rd St with permits, nearest house number first:

- [440 S 43rd St](https://nearbypermits.com/boulder/address/440-s-43rd-st/): newest permit Oct 21, 2024
- [420 S 43rd St](https://nearbypermits.com/boulder/address/420-s-43rd-st/): newest permit Jul 23, 2026
- [415 S 43rd St](https://nearbypermits.com/boulder/address/415-s-43rd-st/): newest permit May 2, 2025
- [410 S 43rd St](https://nearbypermits.com/boulder/address/410-s-43rd-st/): newest permit Jun 27, 2025
- [380 S 43rd St](https://nearbypermits.com/boulder/address/380-s-43rd-st/): newest permit Jan 24, 2025
- [370 S 43rd St](https://nearbypermits.com/boulder/address/370-s-43rd-st/): newest permit Mar 25, 2025
- [365 S 43rd St](https://nearbypermits.com/boulder/address/365-s-43rd-st/): newest permit Sep 5, 2025
- [505 S 43rd St](https://nearbypermits.com/boulder/address/505-s-43rd-st/): newest permit May 19, 2025
- [510 S 43rd St](https://nearbypermits.com/boulder/address/510-s-43rd-st/): newest permit Jun 22, 2026
- [355 S 43rd St](https://nearbypermits.com/boulder/address/355-s-43rd-st/): newest permit Aug 11, 2026

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-08 04:41 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Both permits at this address: https://nearbypermits.com/boulder/address/435-s-43rd-st/