Data through September 2026 · updated 20 Oct 2026
1,420 building permits were issued in ZIP code 80229 by the City of Thornton Development Department, October 2024 through September 2026: 18% of the 7,766 in the City of Thornton, the 3rd busiest ZIP code. Plumbing permits lead with 455. 774 permits in the last 12 months (Oct 2025–Sep 2026), 20% more than the 646 in the 12 months before. Permits from a city that runs its own permit office are not counted.
Share here is the part of the 1,420 permits in 80229; citywide is the same for all of the City of Thornton.
| Kind of work | Permits | Share here | Citywide |
|---|---|---|---|
| Plumbing | 455 | 32% | 24% |
| HVAC | 300 | 21% | 22% |
| Remodels & repairs | 204 | 14% | 16% |
| Electrical | 168 | 12% | 11% |
| Garages, sheds & shade structures | 48 | 3% | 4% |
| New homes | 21 | 1% | 10% |
| Additions | 11 | under 1% | under 1% |
| Solar | 10 | under 1% | under 1% |
| Pools & spas | 2 | under 1% | under 1% |
| Fences & walls | 1 | under 1% | under 1% |
| Other | 200 | 14% | 12% |
Permits issued in each calendar year of the window.
| Year | Months | Permits | Per year |
|---|---|---|---|
| 2024 (from October) | 3 | 162 | 648 |
| 2025 | 12 | 653 | 653 |
| 2026 (through September) | 9 | 605 | 807 |
Permits issued Oct 2024–Sep 2025, at least 12 months before the file ends.
| Measure | 80229 | Citywide |
|---|---|---|
| Permits issued Oct 2024–Sep 2025 | 646 | 3,669 |
| Finished | 81.6% | 84.5% |
| Expired | 15.6% | 12.6% |
Source: City of Thornton Permits map service, layer Building Permits (2017-present), read 20 Oct 2026. We count permits issued October 2024 through September 2026; denied and withdrawn permits are left out.
Building and trade permits the City of Thornton issues inside the city limits, including the part of Thornton in Weld County, except re-roof, fence and backflow/irrigation permits, which the city's published file stops carrying after July 2025 and are left out of every month. Unincorporated Adams County, Northglenn, Westminster and Federal Heights issue their own permits and are not in this file. Right-of-way permits are left out.
Counts are permits, not jobs: one job can need several permits. Nobody paid to be on this page and nobody can. Sources and definitions →
Free to reuse with attribution (CC BY 4.0). Please credit Contractor Records and link to this page. Suggested citation:
Contractor Records, "Building permits in 80229, the City of Thornton", https://contractorrecords.com/thornton/zip/80229, data through September 2026, from the City of Thornton Development Department building-permit records.Link to a table: By kind of work · By year · How permits finish.
Download the tables (CSV): Permits in 80229 by kind of work · Permits in 80229 by year · Permits in 80229: finished and days to final.