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Building permits in 80233, the City of Thornton

Data through September 2026 · updated 20 Oct 2026

1,237 building permits were issued in ZIP code 80233 by the City of Thornton Development Department, October 2024 through September 2026: 16% of the 7,766 in the City of Thornton, the 4th busiest ZIP code. HVAC permits lead with 323. 610 permits in the last 12 months (Oct 2025–Sep 2026), 3% fewer than the 627 in the 12 months before. Permits from a city that runs its own permit office are not counted.

1,237permits in 80233
610last 12 months
83%for homes
Sep 2026records through

Permits in 80233 by kind of work

Share here is the part of the 1,237 permits in 80233; citywide is the same for all of the City of Thornton.

Kind of workPermitsShare hereCitywide
HVAC32326%22%
Plumbing31425%24%
Remodels & repairs24920%16%
Electrical12810%11%
Garages, sheds & shade structures474%4%
Solar131%under 1%
Additions8under 1%under 1%
Pools & spas2under 1%under 1%
Other15312%12%

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Permits in 80233 by year

Permits issued in each calendar year of the window.

YearMonthsPermitsPer year
2024 (from October)3145580
202512619619
2026 (through September)9473631

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How permits in 80233 finish

Permits issued Oct 2024–Sep 2025, at least 12 months before the file ends.

Measure80233Citywide
Permits issued Oct 2024–Sep 20256273,669
Finished83.4%84.5%
Expired13.7%12.6%

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How these numbers are made

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 We count permits issued October 2024 through September 2026; denied and withdrawn permits are left out.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.

  • The city's file names no contractor, so there are no contractor lists, rankings or firm pages for Thornton.
  • Re-roof, fence and backflow permits are not counted: the city's published file drops them after July 2025 (re-roofs went from hundreds a month to almost none), so counting the earlier ones would show a collapse that did not happen. Roofing is not covered on these pages for that reason.
  • The file has a status but no final date, so we can say how many permits finished but not how long they took.
  • Value is the valuation declared on the permit application, not the final cost of the job.
  • Status Closed counts as finished; Expired and Expired Closed count as expired.

Counts are permits, not jobs: one job can need several permits. Nobody paid to be on this page and nobody can. Sources and definitions →

Cite this page

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 80233, the City of Thornton", https://contractorrecords.com/thornton/zip/80233, 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 80233 by kind of work · Permits in 80233 by year · Permits in 80233: finished and days to final.

Common questions

  • How many building permits were issued in 80233?1,237 permits issued by the city in ZIP code 80233, October 2024 through September 2026: 323 HVAC, 314 plumbing, 249 remodels & repairs. 610 were in the last 12 months.
  • What is built most in 80233?HVAC: 323 of the 1,237 permits (26%), against 22% citywide.
  • Who did the work in 80233?The city's file doesn't name contractors, so we can't say. Ask a contractor for the permit numbers of past jobs and check them with the city.

Other ZIP codes

80602802418022980260

All ZIP codes →

Thornton permits by ZIP code →Thornton permit statistics →Browse permits in 80233 →