# Building permits at 420 Iris Ave, Boulder, CO

One permit here in the last two years. The newest, Jun 23: Replacement of tankless water heater with tankless water heater. 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 |
|---|---|---|---|---|
| Jun 23, 2026 | Mechanical (HVAC) | Replacement of tankless water heater with tankless water heater. PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plastic glued vents for fuel burning appliances must undergo pressure testing. To facilitate the inspection process, please provide photographic evidence of  | $4,705 | [MEC2026-01014](https://nearbypermits.com/boulder/permit/MEC2026-01014/) |

## More on this street

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

- [425 Iris Ave](https://nearbypermits.com/boulder/address/425-iris-ave/): newest permit May 27, 2025
- [410 Iris Ave](https://nearbypermits.com/boulder/address/410-iris-ave/): newest permit Mar 18, 2026
- [405 Iris Ave](https://nearbypermits.com/boulder/address/405-iris-ave/): newest permit Jan 30, 2026
- [521 Iris Ave](https://nearbypermits.com/boulder/address/521-iris-ave/): newest permit Sep 2, 2026
- [541 Iris Ave](https://nearbypermits.com/boulder/address/541-iris-ave/): newest permit Oct 21, 2025
- [620 Iris Ave](https://nearbypermits.com/boulder/address/620-iris-ave/): newest permit May 15, 2026
- [625 Iris Ave](https://nearbypermits.com/boulder/address/625-iris-ave/): newest permit Sep 4, 2025
- [630 Iris Ave](https://nearbypermits.com/boulder/address/630-iris-ave/): newest permit Jan 2, 2026
- [655 Iris Ave](https://nearbypermits.com/boulder/address/655-iris-ave/): newest permit Oct 24, 2025
- [675 Iris Ave](https://nearbypermits.com/boulder/address/675-iris-ave/): newest permit Dec 15, 2025

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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 17:41 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

The one permit at this address: https://nearbypermits.com/boulder/address/420-iris-ave/