Overview of Arizona Fire Code
Arizona's fire code is administered by the State Fire Marshal's Office, which operates within the Arizona Department of Forestry and Fire Management (DFFM). The state has adopted the International Fire Code (IFC) as the basis for its statewide fire prevention regulations.
Arizona's fire code framework is established under Arizona Revised Statutes Title 37, Chapter 9 (State Fire Code). The State Fire Marshal is empowered to adopt fire codes, conduct inspections, investigate fires, and enforce compliance across the state.
Arizona operates with a combination of state and local enforcement. Larger cities and fire districts — including Phoenix, Tucson, Mesa, Scottsdale, and Tempe — maintain their own fire prevention bureaus and may adopt additional local amendments. In areas without local fire prevention capability, the State Fire Marshal serves as the enforcement authority.
Arizona's desert climate and wildland-urban interface create fire safety challenges that are distinct from most other states. Extreme heat, low humidity, and proximity to wildfire-prone areas all influence fire code requirements, particularly for construction materials, defensible space, and outdoor fire hazards.
Adopted Codes and Standards
Arizona has adopted the following codes under the Arizona Administrative Code (A.A.C.) Title 4, Chapter 36:
International Fire Code (IFC) — 2018 Edition — The primary fire code governing fire prevention, fire protection system maintenance, hazardous materials, and operational fire safety in existing buildings.
International Building Code (IBC) — 2018 Edition — Referenced for new construction fire safety requirements including fire-resistance ratings, sprinkler system triggers, and egress design.
International Wildland-Urban Interface Code (IWUIC) — Adopted by many Arizona jurisdictions for properties in wildland-urban interface areas. Addresses construction materials, defensible space, and fire-resistant landscaping.
NFPA 13: Sprinkler Systems — Incorporated by reference through the IFC for automatic sprinkler system design and installation.
NFPA 72: Fire Alarm Code — Fire alarm system requirements referenced through the IFC.
NFPA 96: Commercial Cooking Operations — Commercial kitchen fire safety requirements.
NFPA 25: Inspection and Maintenance of Water-Based Fire Protection — Maintenance schedules for sprinkler systems and related equipment.
Note: Arizona jurisdictions vary in which IFC edition they have adopted. Some cities, particularly Phoenix and Tucson, may have adopted more recent editions than the state minimum. Businesses should verify the locally adopted edition with their fire authority.
State Fire Marshal and Enforcement
The Arizona State Fire Marshal operates under the Department of Forestry and Fire Management (DFFM), established under ARS § 37-1301 through 37-1307.
State Fire Marshal Responsibilities:
- Adoption and maintenance of the state fire code
- Fire code inspections in state buildings and jurisdictions without local fire prevention
- Fire investigation and arson enforcement statewide
- Certification of fire inspectors and fire investigators
- Data collection on fire incidents through the National Fire Incident Reporting System (NFIRS)
- Public fire safety education and prevention programs
Local Enforcement: Arizona's major municipalities maintain robust fire prevention programs:
- Phoenix Fire Department — Fire Prevention Bureau handles plan review, inspections, and code enforcement for the largest city in Arizona
- Tucson Fire Department — Fire Prevention division enforces fire codes in the Tucson metro area
- Mesa Fire and Medical Department — Fire Prevention and Plans Review
- Scottsdale Fire Department — Prevention and Plans Review Bureau
- Tempe Fire Medical Rescue — Fire Prevention division
Violations and Penalties: Fire code violations in Arizona can result in written notices, orders to correct, administrative fines, and closure orders for imminent hazards. Under ARS § 37-1307, willful violations of the state fire code can be charged as a Class 2 misdemeanor. Repeat violations or failure to comply with correction orders may result in higher penalties.
Occupancy Requirements
Arizona follows the IBC occupancy load calculation methodology.
Occupancy Load Factors:
- Assembly with tables (restaurants): 15 net sq ft per occupant
- Assembly standing (bars, lounges): 7 net sq ft per occupant
- Business: 100 gross sq ft per occupant
- Mercantile ground floor: 30 gross sq ft per occupant
- Commercial kitchen: 200 gross sq ft per occupant
Posting Requirements: Maximum occupancy must be posted conspicuously in all assembly occupancies. The posted limit must be determined by the fire code official or building official.
Arizona-Specific Considerations:
- Many Arizona restaurants and bars operate with significant outdoor patio seating. Outdoor dining and entertainment areas are subject to occupancy calculations and fire code requirements including egress, lighting, and — in some jurisdictions — proximity to fire department access.
- Large outdoor events and festivals are common in Arizona's climate and require special event permits with specific occupancy, egress, and fire protection provisions.
- During major events (Super Bowl, spring training, conventions), enforcement of occupancy limits increases at hospitality venues.
Enforcement: Fire inspectors in Arizona's major cities regularly check occupancy compliance during routine inspections and in response to complaints. Exceeding posted occupancy is a fire code violation and can result in immediate action.
NOWAITN's Queue app helps Arizona businesses track both indoor and outdoor occupancy in real time, providing documentation that supports compliance during inspections and special events.
Fire Suppression Requirements
Arizona follows the IFC and IBC sprinkler and suppression requirements with limited state amendments.
Automatic Sprinkler Systems:
- Required in Group A-2 (restaurants/bars) with occupant loads of 100+ or fire areas exceeding 5,000 sq ft
- Required in Group A-1 (assembly with fixed seating) with occupant loads per IBC 903.2.1
- Required in Group R-1 (hotels/motels)
- Required in stories exceeding 12,000 sq ft per IBC
Heat and Climate Considerations:
- Arizona's extreme summer heat (regularly exceeding 110°F in Phoenix metro) can affect sprinkler system pressure and water supply reliability
- Attic sprinkler systems may require higher temperature-rated sprinkler heads in buildings with poorly insulated attic spaces
- Water supply for fire suppression may be limited in rural and exurban areas, potentially requiring on-site water storage tanks
Commercial Kitchen Suppression:
- UL 300 wet chemical systems required over commercial cooking equipment producing grease-laden vapors
- Semiannual inspection required
- Hood and duct cleaning per NFPA 96 schedule
Portable Fire Extinguishers:
- Required in all commercial occupancies per IFC Section 906
- Monthly visual inspection, annual maintenance
- Proper rating for hazard type
Wildland-Urban Interface: Properties in designated WUI zones may have additional exterior fire protection requirements including fire-resistant construction materials, defensible space landscaping, and ember-resistant vents.
Wildland-Urban Interface (WUI) Requirements
Arizona's unique geography means that many commercial properties operate near wildfire-prone wildland areas. The wildland-urban interface (WUI) is where developed areas meet or intermix with undeveloped wildland.
WUI Code Adoption: Many Arizona jurisdictions have adopted the International Wildland-Urban Interface Code (IWUIC) or equivalent local standards. Key requirements for commercial properties in WUI zones include:
Defensible Space: Property owners must maintain defensible space around structures, typically divided into zones:
- Zone 1 (0-10 feet from structure): Non-combustible landscaping, no vegetation touching the structure
- Zone 2 (10-30 feet): Reduced vegetation density, fire-resistant plants, cleared of dead vegetation
- Zone 3 (30-100 feet): Thinned trees and brush, removal of ladder fuels
Construction Materials: Buildings in WUI zones must use fire-resistant roofing (Class A rated), ignition-resistant exterior walls, and tempered or multi-pane windows. Attic and foundation vents must be screened to prevent ember intrusion.
Access: Fire apparatus access roads must be maintained year-round with minimum width and clearance requirements.
For businesses in Prescott, Flagstaff, Payson, Sedona, and other Arizona communities in or near wildland areas, WUI compliance is in addition to standard fire code requirements.
Emergency Egress Requirements
Arizona follows IBC egress requirements.
Number of Exits:
- 1-49 occupants: minimum one exit
- 50-499 occupants: minimum two exits
- 500-999 occupants: minimum three exits
- 1,000+ occupants: minimum four exits
Exit Width and Travel Distance:
- Minimum door clear width: 32 inches
- Maximum travel distance: 200 feet (unsprinklered), 250 feet (sprinklered)
Outdoor Dining and Patios: Arizona's extensive use of outdoor dining creates unique egress considerations:
- Outdoor seating areas must have their own means of egress that do not require passing through the interior of the building
- Patio enclosures (shade structures, misters, roll-down walls) cannot block egress paths
- Furniture arrangement in outdoor areas must maintain required aisle widths
Exit Signs and Emergency Lighting:
- Illuminated exit signs at all exits and along the exit path
- Emergency lighting for minimum 90 minutes
- In outdoor areas, emergency lighting may be required depending on ambient light conditions and operating hours
Panic Hardware: Required on exit doors serving assembly occupancies with 50+ occupants.
Arizona-Specific Resources
Arizona State Fire Marshal Department of Forestry and Fire Management 1110 West Washington Street, Suite 500 Phoenix, AZ 85007 Phone: (602) 364-1150
Arizona Revised Statutes — State Fire Code: ARS Title 37, Chapter 9 (§§ 37-1301 through 37-1307)
Key Local Fire Prevention Authorities:
- Phoenix Fire Department — Fire Prevention Bureau: (602) 262-6011
- Tucson Fire Department — Fire Prevention: (520) 791-4873
- Mesa Fire and Medical — Fire Prevention: (480) 644-2101
- Scottsdale Fire Department — Prevention Bureau: (480) 312-1855
- Tempe Fire Medical — Prevention: (480) 350-8961
Arizona Administrative Code — Fire Prevention: A.A.C. Title 4, Chapter 36: State fire code adoption and amendments.
Businesses should contact their local fire prevention bureau to determine locally adopted code editions and any amendments that exceed the state minimum requirements.