# Building permits at 1803 Mapleton Ave, Boulder, CO

Six permits here in the last two years. The newest, Feb 10: A partial renovation including 183 SF addition to a two story single family residence. 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 |
|---|---|---|---|---|
| Feb 10, 2026 | Addition | A partial renovation including 183 SF addition to a two story single family residence. The renovation includes a kitchen, mudroom and pantry remodel. A 284 s.f. one car detached garage submitted under permit BLD-ACC2025-00077. | $71,297 | [BLD-SFD2025-00320](https://nearbypermits.com/boulder/permit/BLD-SFD2025-00320/) |
| Feb 10, 2026 | Fence, wall or deck | Permit for a new 284 sf detached garage. | $47,050 | [BLD-ACC2025-00077](https://nearbypermits.com/boulder/permit/BLD-ACC2025-00077/) |
| Jan 21, 2026 | Mechanical (HVAC) | System Size: 54K BTUs System Components: (1) Mitsubishi HiWall - MSZ-GX24NL (1) Mitsubishi Ceiling Cassette - MLZKX12NL (1) Mitsubishi Ceiling Cassette - MLZKX18NL (1) Mitsubishi HiWall - MSZ-GX06NL (1) Mitsubishi Outdoor Unit - MXZSM48NLHZ (1) Mitsubishi Branch Box - PACLMA50BC Electrical Upgrades: | $35,596 | [MEC2026-00110](https://nearbypermits.com/boulder/permit/MEC2026-00110/) |
| Oct 28, 2025 | Electrical | Provide temporary electrical power Linked to BLD-SFD2025-00320 | Not listed | [ELE2025-01158](https://nearbypermits.com/boulder/permit/ELE2025-01158/) |
| Oct 6, 2025 | Electrical | Solar and ESS Installation System size: 6.02kw DC and 11.5kw AC BATTERY QUANTITY: (1) Tesla Powerwall 3 w/ backup switch NEW: PV MODULES: (14) Q.TRON BLK M-G2-430 | $31,630 | [ELE2025-00891](https://nearbypermits.com/boulder/permit/ELE2025-00891/) |
| Aug 28, 2025 | Mechanical (HVAC) | Replacing heat pump outdoor unit System Components: (1) Mitsubishi 30K BTU Outdoor Unit - MXZ-3C30NAHZ4-U1 Electrical Upgrades: Branch Circuit Connection All new plastic glued vents for fuel burning appliances must undergo pressure testing. To facilitate the inspection process, please provide photog | $9,483 | [MEC2025-01431](https://nearbypermits.com/boulder/permit/MEC2025-01431/) |

## More on this street

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

- [1804 Mapleton Ave](https://nearbypermits.com/boulder/address/1804-mapleton-ave/): newest permit Mar 26, 2026
- [1829 Mapleton Ave](https://nearbypermits.com/boulder/address/1829-mapleton-ave/): newest permit Mar 6, 2026
- [1836 Mapleton Ave](https://nearbypermits.com/boulder/address/1836-mapleton-ave/): newest permit Apr 7, 2026
- [1730 Mapleton Ave](https://nearbypermits.com/boulder/address/1730-mapleton-ave/): newest permit Sep 8, 2025
- [1719 Mapleton Ave](https://nearbypermits.com/boulder/address/1719-mapleton-ave/): newest permit Sep 25, 2026
- [1713 Mapleton Ave](https://nearbypermits.com/boulder/address/1713-mapleton-ave/): newest permit Jan 8, 2026
- [1920 Mapleton Ave](https://nearbypermits.com/boulder/address/1920-mapleton-ave/): newest permit Sep 3, 2025
- [1928 Mapleton Ave](https://nearbypermits.com/boulder/address/1928-mapleton-ave/): newest permit Jun 18, 2026
- [1612 Mapleton Ave](https://nearbypermits.com/boulder/address/1612-mapleton-ave/): newest permit Jan 29, 2025
- [2004 Mapleton Ave](https://nearbypermits.com/boulder/address/2004-mapleton-ave/): newest permit Sep 2, 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 12:31 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 6 permits at this address: https://nearbypermits.com/boulder/address/1803-mapleton-ave/