Building Permits in Colorado

We cover 19 cities in Colorado. Select a city below to see local permit requirements.

19 Cities Covered
1,238 Permit Rules
IRC Building Code Base

About Building Permits in Colorado

Building permit requirements in Colorado are enforced at the local level by city and county building departments. Most jurisdictions adopt the International Residential Code (IRC) as their baseline building standard, though many cities add local amendments that can make requirements stricter or more lenient.

We currently cover 19 cities in Colorado with 1,238 specific permit rules. Permit fees, processing times, and exemption thresholds vary by city — select your city below for details.

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Cities in Colorado

Denver
Pop. 734,718
54 rules
Colorado Springs
Pop. 493,540
70 rules
Aurora
Pop. 386,261
54 rules
Fort Collins
Pop. 170,924
70 rules
Lakewood
Pop. 155,984
54 rules
Thornton
Pop. 144,922
59 rules
Arvada
Pop. 121,414
59 rules
Westminster
Pop. 114,875
59 rules
Greeley
Pop. 114,363
70 rules
Pueblo
Pop. 111,000
70 rules
Centennial
Pop. 106,883
59 rules
Boulder
Pop. 106,802
70 rules
Longmont
Pop. 100,764
70 rules
Loveland
Pop. 81,102
70 rules
Windsor
Pop. 41,734
70 rules
Fountain
Pop. 29,800
70 rules
Evans
Pop. 22,394
70 rules
Louisville
Pop. 20,811
70 rules
Johnstown
Pop. 20,639
70 rules

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