Adopted edition
IRC 2021
Effective
State · CO
Colorado building codes at a glance.
County adoption. Most Front Range and resort counties on IRC 2021. WUI overlays widespread in foothill/mountain terrain.
CO Colorado
IECC zones 4B, 5B, 6B, 7 · ASCE 7 design wind 85–105 mph
Adoption model
County adoption
Permits issued: Local
Coverage status
Indexed
Parcel layer + adopted-edition library + amendment overlay all live.
Climate zones (IECC)
4B · 5B · 6B · 7
Drives R-value, fenestration U-factor, and air-leakage envelope rules.
Design wind speed
85–105 mph
ASCE 7 Risk Category II, 3-second gust at 33 ft. Fastener spec follows.
Special zones
- HVHZ (not applicable)
- WUI (applicable)
- FEMA SFHA overlays (present)
Compliance track
What's required to build here.
County-by-county; Front Range counties on IRC 2021. WUI overlays in Boulder, Larimer, Jefferson.
County directory
All 64 counties in Colorado.
Each county page shows the adopted edition, county-level amendments, and permit-office contact.
- Adams County
- Alamosa County
- Arapahoe County
- Archuleta County
- Baca County
- Bent County
- Boulder County
- Broomfield County
- Chaffee County
- Cheyenne County
- Clear Creek County
- Conejos County
- Costilla County
- Crowley County
- Custer County
- Delta County
- Denver County
- Dolores County
- Douglas County
- Eagle County
- El Paso County
- Elbert County
- Fremont County
- Garfield County
- Gilpin County
- Grand County
- Gunnison County
- Hinsdale County
- Huerfano County
- Jackson County
- Jefferson County
- Kiowa County
- Kit Carson County
- La Plata County
- Lake County
- Larimer County
- Las Animas County
- Lincoln County
- Logan County
- Mesa County
- Mineral County
- Moffat County
- Montezuma County
- Montrose County
- Morgan County
- Otero County
- Ouray County
- Park County
- Phillips County
- Pitkin County
- Prowers County
- Pueblo County
- Rio Blanco County
- Rio Grande County
- Routt County
- Saguache County
- San Juan County
- San Miguel County
- Sedgwick County
- Summit County
- Teller County
- Washington County
- Weld County
- Yuma County
Working in Colorado?
Pull an address-level code packet for any property. SkyCanvass resolves the parcel, looks up the jurisdiction's adopted edition + amendments, and emits a cited packet ready for permit submittal.
For state-vs-state comparisons see the state comparison view, or browse the state directory.
Pull a CO code packet.
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