# Building permits at 4430 Aaron Pl, Boulder, CO

Four permits on record here. The newest, Sep 28: 5 Ton electric heat pump installation replacing an existing gas furnace. 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 |
|---|---|---|---|---|
| Sep 28, 2026 | Mechanical (HVAC) | 5 Ton electric heat pump installation replacing an existing gas furnace. The gas line will be capped at the removed furnace location. Need to disconnect the electrical from the old HVAC and connect it to the new HVAC. PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plas | $18,675 | [MEC2026-01800](https://nearbypermits.com/boulder/permit/MEC2026-01800/) |
| Dec 3, 2024 | Alteration or repair | NEW STAIRWAY/ENTRENCE TO EX.BASEMENT NEW EGRESS WINDOW WELL *5/27/2025 Revision for depth of underpinning along existing foundation and adding 2" of rigid insulation and 10" of crushed stone under lower stair landing* REVISION 11/28/25-New dedicated circuits, pump power, hot tub circuit installation | $20,000 | [BLD-SFD2024-00372](https://nearbypermits.com/boulder/permit/BLD-SFD2024-00372/) |
| Sep 25, 2019 | Mechanical (HVAC) | VOID-180 Days no activity Replace 50 gallon electric water heater. To include 3/4 ball valve, ST5 expansion tank, T&P valve drain to pan and drain pan to floor drain. | $2,500 | [MEC2019-01606](https://nearbypermits.com/boulder/permit/MEC2019-01606/) |
| Dec 3, 2002 | Mechanical (HVAC) | Replace forced air furnace with associated gas piping | $2,200 | [PMT2002-05144-MEC](https://nearbypermits.com/boulder/permit/PMT2002-05144-MEC/) |

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-06 10:23 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 4 permits at this address: https://nearbypermits.com/boulder/address/4430-aaron-pl/