# Building permits at 3890 Darley Ave, Boulder, CO

Nine permits on record here. The newest, Aug 3: Replace existing 3-ton straight-cool condenser and matching air handler with a new 3-ton Lennox EL22KCV. 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 |
|---|---|---|---|---|
| Aug 3, 2026 | Mechanical (HVAC) | Replace existing 3-ton straight-cool condenser and matching air handler with a new 3-ton Lennox EL22KCV variable-speed air conditioner and CBK47E single-speed air handler. No structural changes. PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plastic glued vents for fue | $24,998 | [MEC2026-01333](https://nearbypermits.com/boulder/permit/MEC2026-01333/) |
| Dec 11, 2019 | Mechanical (HVAC) | *Replace Hot Water Heater with 50 Gallon Bradford White | $979 | [MEC2019-02049](https://nearbypermits.com/boulder/permit/MEC2019-02049/) |
| Jun 14, 2019 | Electrical | Service change for a single family dwelling, 200 amps. | $3,200 | [ELE2019-00784](https://nearbypermits.com/boulder/permit/ELE2019-00784/) |
| Mar 7, 2013 | Mechanical (HVAC) | Replacement forced-air furnace and A/C unit | $12,890 | [PMT2013-00863-MEC](https://nearbypermits.com/boulder/permit/PMT2013-00863-MEC/) |
| Nov 16, 2009 | Mechanical (HVAC) | Installation of a replacement gas-fired boiler -- unknown btu demand. | $4,668 | [PMT2009-04671-MEC](https://nearbypermits.com/boulder/permit/PMT2009-04671-MEC/) |
| Aug 25, 2005 | Roofing | Roofing permit: total tear-off and overlay of a single-family detached dwelling, dimensional shingles, 24 squares, 4/12 pitch | $4,720 | [PMT2005-03310-RFG](https://nearbypermits.com/boulder/permit/PMT2005-03310-RFG/) |
| Dec 20, 1990 | Fence, wall or deck | Fence six FT cedar fence | $750 | [PMT1990-R5516-FEN](https://nearbypermits.com/boulder/permit/PMT1990-R5516-FEN/) |
| Aug 2, 1988 | Electrical | Electrical wire for a/c unit | $200 | [PMT1988-N0068-ELE](https://nearbypermits.com/boulder/permit/PMT1988-N0068-ELE/) |
| Jul 18, 1988 | Mechanical (HVAC) | Mechanical add comfort cooling | $2,316 | [PMT1988-M9705-MEC](https://nearbypermits.com/boulder/permit/PMT1988-M9705-MEC/) |

## More on this street

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

- [3865 Darley Ave](https://nearbypermits.com/boulder/address/3865-darley-ave/): newest permit Nov 13, 2025
- [3930 Darley Ave](https://nearbypermits.com/boulder/address/3930-darley-ave/): newest permit Jul 21, 2026
- [3935 Darley Ave](https://nearbypermits.com/boulder/address/3935-darley-ave/): newest permit Nov 26, 2025
- [3990 Darley Ave](https://nearbypermits.com/boulder/address/3990-darley-ave/): newest permit Sep 18, 2026
- [4060 Darley Ave](https://nearbypermits.com/boulder/address/4060-darley-ave/): newest permit May 22, 2025
- [4065 Darley Ave](https://nearbypermits.com/boulder/address/4065-darley-ave/): newest permit Feb 18, 2025
- [3710 Darley Ave](https://nearbypermits.com/boulder/address/3710-darley-ave/): newest permit Jun 15, 2026
- [3705 Darley Ave](https://nearbypermits.com/boulder/address/3705-darley-ave/): newest permit Aug 25, 2026
- [4095 Darley Ave](https://nearbypermits.com/boulder/address/4095-darley-ave/): newest permit May 20, 2026
- [3555 Darley Ave](https://nearbypermits.com/boulder/address/3555-darley-ave/): newest permit May 5, 2025

---
Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-08 07:33 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 9 permits at this address: https://nearbypermits.com/boulder/address/3890-darley-ave/