# Building permits at 2431 4th St, Boulder, CO

Three permits on record here. The newest, Dec 16, 2024: Per owners request install a voluntary addressable fire alarm system with full occupant notification. 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 |
|---|---|---|---|---|
| Dec 16, 2024 | Fire systems | Per owners request install a voluntary addressable fire alarm system with full occupant notification throughout. (FAN) | $8,769 | [FIR2024-00487](https://nearbypermits.com/boulder/permit/FIR2024-00487/) |
| Dec 16, 2024 | Fire systems | Installation of new NFPA 13D sprinkler system. 2 Story residence with full basement and attached 1 car garage. (Fsn13d) | $15,637 | [FIR2024-00484](https://nearbypermits.com/boulder/permit/FIR2024-00484/) |
| Aug 20, 2024 | New building | New construction of a two-bedroom two-story single family home with an attached single-car garage and finished basement. Unit Area: Basement 1395 SF, First Floor, 1310 SF excluding garage, Second Floor 1227 SF, Garage 254 SF totaling 4,186 SF (inclusive of garage). Additionally there are two patios  | $695,408 | [BLD-SFD2023-00408](https://nearbypermits.com/boulder/permit/BLD-SFD2023-00408/) |

## More on this street

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

- [2429 4th St](https://nearbypermits.com/boulder/address/2429-4th-st/): newest permit Dec 27, 2024
- [2435 4th St](https://nearbypermits.com/boulder/address/2435-4th-st/): newest permit Aug 21, 2026
- [2427 4th St](https://nearbypermits.com/boulder/address/2427-4th-st/): newest permit Mar 7, 2025
- [2436 4th St](https://nearbypermits.com/boulder/address/2436-4th-st/): newest permit Nov 3, 2025
- [2425 4th St](https://nearbypermits.com/boulder/address/2425-4th-st/): newest permit Mar 28, 2025
- [2385 4th St](https://nearbypermits.com/boulder/address/2385-4th-st/): newest permit Aug 25, 2025
- [2521 4th St](https://nearbypermits.com/boulder/address/2521-4th-st/): newest permit Jun 23, 2025
- [2525 4th St](https://nearbypermits.com/boulder/address/2525-4th-st/): newest permit Aug 28, 2026
- [2529 4th St](https://nearbypermits.com/boulder/address/2529-4th-st/): newest permit Jul 16, 2026
- [2323 4th St](https://nearbypermits.com/boulder/address/2323-4th-st/): newest permit Jan 21, 2026

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 07:42 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 3 permits at this address: https://nearbypermits.com/boulder/address/2431-4th-st/