# Building permits at 520 Mapleton Ave, Boulder, CO

Three permits on record here. The newest, Jan 14, 2025: Replace water heater - new tankless gas water heater (199MBH/0.98UEF) [IN CRAWLSPACE]. 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 |
|---|---|---|---|---|
| Jan 14, 2025 | Mechanical (HVAC) | Replace water heater - new tankless gas water heater (199MBH/0.98UEF) [IN CRAWLSPACE] | $9,152 | [MEC2025-00061](https://nearbypermits.com/boulder/permit/MEC2025-00061/) |
| Apr 27, 2023 | Mechanical (HVAC) | Installation of Furnace 96% 80K BTU and Heat pump 3 ton 20 Seer with Subcontractor for electrical | $19,828 | [MEC2023-00584](https://nearbypermits.com/boulder/permit/MEC2023-00584/) |
| Apr 19, 2019 | Roofing | *Reroof with owens corning duration | $9,332 | [RFG2019-00260](https://nearbypermits.com/boulder/permit/RFG2019-00260/) |

## More on this street

Other addresses on Mapleton Ave with permits, nearest house number first:

- [501 Mapleton Ave](https://nearbypermits.com/boulder/address/501-mapleton-ave/): newest permit Nov 18, 2024
- [553 Mapleton Ave](https://nearbypermits.com/boulder/address/553-mapleton-ave/): newest permit Jan 29, 2025
- [433 Mapleton Ave](https://nearbypermits.com/boulder/address/433-mapleton-ave/): newest permit Jan 26, 2026
- [417 Mapleton Ave B](https://nearbypermits.com/boulder/address/417-mapleton-ave-b/): newest permit Oct 15, 2024
- [625 Mapleton Ave](https://nearbypermits.com/boulder/address/625-mapleton-ave/): newest permit Feb 18, 2026
- [403 Mapleton Ave](https://nearbypermits.com/boulder/address/403-mapleton-ave/): newest permit Feb 4, 2026
- [642 Mapleton Ave](https://nearbypermits.com/boulder/address/642-mapleton-ave/): newest permit May 19, 2026
- [704 Mapleton Ave](https://nearbypermits.com/boulder/address/704-mapleton-ave/): newest permit Jan 7, 2026
- [707 Mapleton Ave](https://nearbypermits.com/boulder/address/707-mapleton-ave/): newest permit Mar 12, 2025
- [712 Mapleton Ave](https://nearbypermits.com/boulder/address/712-mapleton-ave/): newest permit Mar 9, 2026

---
Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 05:02 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/520-mapleton-ave/