# Building permits at 5023 4th St, Boulder, CO

Two permits here in the last two years. The newest, Apr 2, 2025: VOID- Over 180 Days No Activity Replace Furnace 96% EFF 100K BTU AC 4 Ton 15 Seer. 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 |
|---|---|---|---|---|
| Apr 2, 2025 | Mechanical (HVAC) | VOID- Over 180 Days No Activity Replace Furnace 96% EFF 100K BTU AC 4 Ton 15 Seer | $9,811 | [MEC2025-00511](https://nearbypermits.com/boulder/permit/MEC2025-00511/) |
| Mar 31, 2025 | Mechanical (HVAC) | VOID 180 Days No Activity Replace 50 gallon gas tank water heater with tankless water heater | $3,000 | [MEC2025-00498](https://nearbypermits.com/boulder/permit/MEC2025-00498/) |

## More on this street

Other addresses on 4th St with permits, nearest house number first:

- [5022 4th St](https://nearbypermits.com/boulder/address/5022-4th-st/): newest permit Mar 11, 2025
- [3563 4th St](https://nearbypermits.com/boulder/address/3563-4th-st/): newest permit Sep 5, 2025
- [3561 4th St](https://nearbypermits.com/boulder/address/3561-4th-st/): newest permit Jun 23, 2025
- [3500 4th St](https://nearbypermits.com/boulder/address/3500-4th-st/): newest permit Nov 5, 2025
- [3421 4th St](https://nearbypermits.com/boulder/address/3421-4th-st/): newest permit Jan 23, 2026
- [3390 4th St](https://nearbypermits.com/boulder/address/3390-4th-st/): newest permit Apr 6, 2026
- [3380 4th St](https://nearbypermits.com/boulder/address/3380-4th-st/): newest permit Apr 3, 2026
- [3369 4th St](https://nearbypermits.com/boulder/address/3369-4th-st/): newest permit Dec 11, 2025
- [3355 4th St](https://nearbypermits.com/boulder/address/3355-4th-st/): newest permit Jul 9, 2026
- [3311 4th St](https://nearbypermits.com/boulder/address/3311-4th-st/): newest permit Nov 17, 2025

---
Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 12:50 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/5023-4th-st/