# Building permits at 312 Mapleton Ave, Boulder, CO

Five permits on record here. The newest, Jan 9: Mid-roof inspection is required if 1) pitch is less than 4/12 or 2) for any roof type other than asphalt. 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 9, 2026 | Roofing | Mid-roof inspection is required if 1) pitch is less than 4/12 or 2) for any roof type other than asphalt shingles (regardless of pitch). For roof/attic assemblies requiring 1/150 ventilation, include a calculation detailing the quantity of intake and exhaust vents demonstrating 1/150 venting ratio c | $5,440 | [RFG2026-00017](https://nearbypermits.com/boulder/permit/RFG2026-00017/) |
| Apr 2, 2024 | Alteration or repair | Bathroom remodel of 57 sf on the lower level, and bathroom remodel on main level of 74 sf. Moving washer and dryer from lower level bathroom to main floor bedroom. | $36,840 | [BLD-SFD2024-00085](https://nearbypermits.com/boulder/permit/BLD-SFD2024-00085/) |
| Oct 3, 2016 | Mechanical (HVAC) | Replacement Forced Air Furnace | $3,496 | [PMT2016-20314-MEC](https://nearbypermits.com/boulder/permit/PMT2016-20314-MEC/) |
| Jul 16, 2008 | Demolition | Demo accessory building. See his2008-00171 | Not listed | [PMT2008-03001-DEM](https://nearbypermits.com/boulder/permit/PMT2008-03001-DEM/) |
| Aug 27, 1990 | Alteration or repair | Rmdl. The original general permit number is r1797. | $25,000 | [PMT1990-R1797](https://nearbypermits.com/boulder/permit/PMT1990-R1797/) |

## More on this street

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

- [311 Mapleton Ave](https://nearbypermits.com/boulder/address/311-mapleton-ave/): newest permit Sep 17, 2026
- [403 Mapleton Ave](https://nearbypermits.com/boulder/address/403-mapleton-ave/): newest permit Feb 4, 2026
- [417 Mapleton Ave B](https://nearbypermits.com/boulder/address/417-mapleton-ave-b/): newest permit Oct 15, 2024
- [433 Mapleton Ave](https://nearbypermits.com/boulder/address/433-mapleton-ave/): newest permit Jan 26, 2026
- [501 Mapleton Ave](https://nearbypermits.com/boulder/address/501-mapleton-ave/): newest permit Nov 18, 2024
- [520 Mapleton Ave](https://nearbypermits.com/boulder/address/520-mapleton-ave/): newest permit Jan 14, 2025
- [553 Mapleton Ave](https://nearbypermits.com/boulder/address/553-mapleton-ave/): newest permit Jan 29, 2025
- [625 Mapleton Ave](https://nearbypermits.com/boulder/address/625-mapleton-ave/): newest permit Feb 18, 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

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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 02:11 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 5 permits at this address: https://nearbypermits.com/boulder/address/312-mapleton-ave/