Building Permits in Colorado
We cover 35 cities in Colorado. Select a city below to see local permit requirements.
Building Codes in Colorado
Building permit requirements in Colorado are enforced at the local level, each city and county building department sets its own rules, fees, and timelines. Most cities in Colorado follow the 2021 IRC, though 5 cities are still on the 2024 edition.
We cover 35 cities in Colorado with 3,502 specific permit rules. That's real, locally researched data, not generic advice. Each city page shows exactly what triggers a permit, what's exempt, estimated fees, and how to apply.
The bottom line: don't assume your city follows the same rules as the one next door. A fence that's exempt in one town might need a full permit two miles away. Always check your specific city.
Common Permit Exemptions in Colorado
These are the most common projects that don't require a permit across cities in Colorado. Keep in mind, "exempt from a permit" doesn't mean "exempt from code." You still have to build to code even without a permit.
Fence: Exempt in 61 of our 35 covered cities
Windows and Doors: Exempt in 54 of our 35 covered cities
Tree Removal: Exempt in 35 of our 35 covered cities
Siding: Exempt in 35 of our 35 covered cities
Shed: Exempt in 35 of our 35 covered cities
Exemptions vary by city. Always verify with your local building department before starting work.
Contractor Licensing in Colorado
If you're hiring a contractor in Colorado, make sure they're properly licensed. You can verify credentials through the Colorado DORA – Electrical/Plumbing.
Two rules of thumb: never pay a contractor in full upfront, a third down is standard. And if a contractor tells you "we don't need a permit for this," that's a red flag. Use PermitMint to verify before you sign anything.
Popular Project Guides
Common home improvement projects in Colorado:
Cities in Colorado
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