FLAGSTAFF, Ariz. — The Flagstaff City Council has officially adopted the 2024 Building and Fire Codes, introducing new construction requirements aimed at improving public health, reducing wildfire risks, increasing energy efficiency, and making buildings safer throughout the community.
The new regulations were approved during the City Council meeting on Tuesday, October 6, and will take effect on January 1, 2027. The updated codes primarily apply to new construction, with building permit applications submitted on or after that date required to comply with the new standards.
Radon Protection Required in New Buildings
One of the most significant changes involves mandatory radon protection measures in all new buildings constructed within Flagstaff.
Radon is a naturally occurring radioactive gas that can accumulate indoors and is the leading cause of lung cancer among nonsmokers. Under the updated building codes, all new buildings will be required to incorporate passive radon mitigation systems designed to reduce potential exposure.
For residents living in existing homes, the City encourages radon testing and mitigation when necessary. Free radon testing kits and additional information are available through the Arizona Department of Health Services.
Increased Wildfire Protection
With Flagstaff’s location surrounded by the Coconino National Forest and its ongoing exposure to wildfire threats, the updated codes also place greater emphasis on wildfire-resistant construction.
The new standards encourage the use of noncombustible building materials and construction methods intended to reduce the likelihood of structures igniting during wildfires.
City officials say these improvements could help protect homes, businesses, residents, and first responders while potentially improving homeowners’ ability to obtain insurance or qualify for lower premiums.
However, any potential insurance savings would depend on individual insurance providers and policies.
Energy Efficiency and Lower Utility Costs
The updated codes also expand energy and water efficiency standards for new buildings, with the goal of reducing long-term operating expenses for property owners.
The changes are designed to make buildings better equipped for solar panel installations, electric appliances, and electric vehicle charging infrastructure.
By incorporating these features during initial construction, property owners may avoid more expensive retrofits in the future.
According to the City, the new regulations also provide builders with several compliance options, allowing them to select different combinations of materials, equipment, and efficiency measures rather than requiring every project to follow the same construction approach.
What Does This Mean for Existing Homeowners?
The new building and fire codes primarily target new construction and do not automatically require owners of existing homes to retrofit their properties to meet every updated standard.
However, homeowners planning additions, major renovations, or other projects requiring building permits should consult the City’s building department to determine which requirements may apply.
New Requirements Begin January 1, 2027
The City of Flagstaff developed the updated codes through collaboration with local stakeholders, construction industry professionals, neighboring jurisdictions, and various City boards and commissions.
Flagstaff joins more than a dozen Arizona municipalities that have adopted the 2024 building codes.
To help builders and contractors prepare, the City plans to offer educational materials and training opportunities ahead of the January 1 implementation date.
Building permit applications submitted before January 1, 2027, are not subject to the new codes solely because of this adoption. Applications submitted on or after that date must comply with the updated requirements.
Residents, contractors, and property owners interested in reviewing the changes can find additional information in the October 6 Flagstaff City Council agenda.
The City also presented comprehensive summaries of the changes during its September 8 and September 16 Council meetings.
