Adams County building & ADU permits
Recent permit activity, updated continuously.
Adams County covers the north Denver metro, including Thornton, Brighton, Commerce City and Federal Heights. Its permit records carry a dedicated accessory-dwelling work type, so ADU projects are separated from ordinary accessory structures at the source.
Igni is tracking 592 residential and building permits in Adams County, CO — including 6 classified accessory-dwelling-unit (ADU) filings. The most active ZIP is 80221. The most recent filing Igni tracked was Oct 31, 2026. All records come from Adams County (ArcGIS), an official government open-data feed, and are refreshed continuously.
592
Permits tracked
6
ADU permits
16
Distinct ZIP codes
Oct 31, 2026
Newest permit
Recent permits
A sample of the freshest permits in this jurisdiction — ZIP and city only (no street addresses).
| ZIP | Permit type | ADU type | Valuation | Applied |
|---|---|---|---|---|
| 80102 | Residential | Unknown | — | Oct 30, 2026 |
| 80229 | Commercial | — | — | Oct 30, 2026 |
| 80229 | Residential | — | — | Oct 30, 2026 |
| 80136 | Residential | — | — | Oct 30, 2026 |
| 80229 | Residential | — | — | Oct 30, 2026 |
| 80602 | Residential | — | — | Oct 30, 2026 |
| 80102 | Residential | — | — | Oct 30, 2026 |
| 80602 | Residential | — | — | Oct 30, 2026 |
| 80229 | Commercial | — | — | Oct 30, 2026 |
| 80229 | Residential | — | — | Oct 29, 2026 |
| 80221 | Residential | — | — | Oct 29, 2026 |
| 80602 | Residential | — | — | Oct 29, 2026 |
| 80003 | Residential | — | — | Oct 29, 2026 |
| 80602 | Residential | — | — | Oct 29, 2026 |
| 80601 | Residential | — | — | Oct 29, 2026 |
| 80602 | Residential | — | — | Oct 29, 2026 |
| 80137 | Commercial | — | — | Oct 29, 2026 |
| 80221 | Residential | — | — | Oct 29, 2026 |
| 80603 | Residential | — | — | Oct 29, 2026 |
| 80221 | Residential | — | — | Oct 29, 2026 |
Top ZIP codes by recent activity
ADU types in the recent set
Housing law — Colorado
Colorado's HB24-1152 (2024) requires larger Front Range municipalities to allow at least one accessory dwelling unit, by administrative approval, wherever single-family homes are permitted — generally from June 30, 2025.
HB24-1313 (2024) requires qualifying transit-oriented communities to plan for greater housing density near rail and frequent-bus corridors, rather than imposing a statewide duplex mandate.
Data source
Sourced from Adams County (ArcGIS). Public records (CO CORA).
Nearby cities — Colorado
Learn more about ADUs & building permits
Background reading on accessory dwelling units, building permits, and how Igni turns Adams County permit records into leads.
Adams County permit data — FAQ
Where does Igni get Adams County permit data?
How fresh is Adams County permit data?
Does Adams County allow accessory dwelling units (ADUs)?
Get permit leads — Adams County
Fresh, filterable residential and ADU permit leads from Adams County — delivered before your competitors even know.
Informational only, not legal advice. Headline counts reflect all permits Igni has tracked for this jurisdiction; the table shows recent activity. Housing law changes — verify current statutes before relying on this.