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Jefferson County, CO Fire Regulations: Wildfire Zones (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Adopting resolution
CC23-054
Effective date
April 10, 2023
Code adopted
2018 IFC, Appendices E, F, G only
Max fine per violation
$1,000 civil infraction
Enforcing agency
Jeffco Sheriff's Office
Appeal deadline
30 days to Board of Review

Summary

Unincorporated Jefferson County runs on the 2018 International Fire Code as its minimum fire safety standard, adopted by the Board of County Commissioners under Resolution CC23-054. Fire protection districts with their own approved code control inside their boundaries; the Sheriff's Office enforces the code everywhere else, with violations charged as civil infractions.

City-specific rules exist: Arvada has its own wildfire zones rules that differ from Jefferson County's county-level regulations. If you live in Arvada, check the city-specific page instead.

The 2018 edition of the International Fire Code, as promulgated by the International Code Council, with Appendices E, F and G only (the "Fire Code") shall serve as the minimum fire safety standards for unincorporated Jefferson County. The full text of the 2018 edition of the International Fire Code is incorporated into this Ordinance as if fully set forth herein, save and except for Appendices A-D and H-N, which are expressly excluded from the Fire Code. ... Any person who violates any of the provisions of the Fire Code commits a civil infraction and, upon conviction thereof, such person shall be punished by a fine of not more than $1000 for each separate violation, which shall be collected by the Treasurer of Jefferson County and paid into the treasury of Jefferson County.

Full Breakdown

The Board of County Commissioners adopted the 2018 edition of the International Fire Code, published by the International Code Council, as the countywide minimum fire safety standard effective April 10, 2023 (Resolution CC23-054, adopted February 21, 2023). Only Appendices E, F and G are incorporated; Appendices A-D and H-N are expressly excluded from the code. S. Title 32 that has adopted its own fire code approved by the Board of County Commissioners, that district's code controls instead of the county's version, and the district enforces it.

Everywhere else in unincorporated Jefferson County, the Sheriff's Office is the enforcing agency. A property owner or applicant who disagrees with a Sheriff's decision under the Fire Code, including denial of a permit application or a dispute over how a provision was interpreted, can appeal to the Jefferson County Board of Review, sitting as the Board of Appeals, within 30 days of the decision. 5 as the county's statutory authority to adopt a fire code by resolution.

Violations & Fines

Violating any provision of the Fire Code is a civil infraction, punishable by a fine of up to $1,000 for each separate violation, collected by the County Treasurer and deposited into the county treasury. Under C.R.S. § 30-15-402(2), a convicted violator also owes a mandatory $10 surcharge, collected by the clerk of the court and sent to the judicial district's victims and witnesses assistance and law enforcement fund.

Frequently Asked Questions

Which fire code applies in unincorporated Jefferson County?
The 2018 International Fire Code, adopted by Resolution CC23-054 effective April 10, 2023, with only Appendices E, F and G incorporated; Appendices A through D and H through N are excluded from the county's version.
Who enforces the fire code where I live?
If you're inside a fire protection district that has adopted its own approved code, that district enforces its own code. Everywhere else in unincorporated Jefferson County, the Sheriff's Office enforces the county's Fire Code.
What happens if I violate the Fire Code?
It's a civil infraction carrying a fine of up to $1,000 per violation, paid to the County Treasurer, plus a mandatory $10 surcharge under state law that funds victims' assistance and law enforcement.
Can I appeal a Fire Code decision by the Sheriff?
Yes. Any Sheriff decision under the Fire Code, including a denied permit or a disputed interpretation, can be appealed to the Jefferson County Board of Review, acting as the Board of Appeals, within 30 days of the decision.

Sources & Official References

Other rules in Jefferson County

All Jefferson County rules

Compare Jefferson County to another location·View the Colorado fire regulations overview

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