Battery energy storage in Arizona
A utility-scale outdoor system in Arizona follows the State Fire Code, the 2024 International Fire Code (IFC). The State Fire Marshal enforces it outside cities of 100,000 people or more with their own fire code. Counties and cities set siting rules through zoning, and Mesa allows facilities of 5 megawatts (MW) or more only in industrial districts.A commercial storage system in Arizona follows the State Fire Code, the 2024 International Fire Code (IFC), or a local fire code. Phoenix requires plans, a permit, and an inspection for every commercial stationary storage battery system. Cities and counties adopt the National Electrical Code (NEC).A home storage system in Arizona follows the residential and electrical codes of its city or county. The State Fire Code’s fire protection and exit standards exclude dwellings of fewer than five units. The Phoenix Fire Department issues an over-the-counter permit for home batteries above 3 kWh and up to 27 kWh.
Rules as of Oct 18, 20260 verified0 partial0 lead onlyEach status opens its source
What the seals mean
- Verified
- Two separate readings of the source agree, and the passage is on file word for word.
- Partial
- Read in a primary source. It stays partial until the passage is on file word for word.
- Lead only
- Only a secondary source, such as a law firm summary or a code tracker, says this so far.
How the rules stack
Five layers set what a storage system must meet in Arizona, from the product listing to state law. Arizona sets one state fire code, and cities and counties adopt the rest.
- Listing
We found no Arizona statute or amendment that names UL 9540, so the State Fire Code relies on the 2024 IFC listing rule. In Phoenix, a unit’s UL 9540 listing can allow closer spacing to doors and windows.
Listing
Status: Partial.Arizona Administrative Code, Title 4, Chapter 36 (Supplement 26-1) (opens in a new tab)
Arizona Secretary of State
apps.azsos.gov, read Oct 18, 2026Also cited: sbcc.wa.gov and phoenix.gov
- Model codes
The 2024 IFC holds the model storage rules in Section 1207. We found no Arizona rule that adopts the National Fire Protection Association (NFPA) 855 installation standard directly.
Model codes
Status: Partial.ICC guide to 2024 IFC changes (table of contents) (opens in a new tab)
International Code Council
shop.iccsafe.org, read Oct 17, 2026Also cited: apps.azsos.gov
- State code
The 2024 IFC is the State Fire Code from Apr 13, 2026, and we found no state change to its storage rules. Cities of 100,000 people or more with their own fire code are exempt, except in state and county buildings.
State codes
Status: Partial.Arizona Administrative Code, Title 4, Chapter 36 (Supplement 26-1) (opens in a new tab)
Arizona Secretary of State
apps.azsos.gov, read Oct 18, 2026Also cited: azleg.gov
- Local
Cities and counties adopt the residential and electrical codes, and fire districts adopt fire codes the State Fire Marshal approves. Phoenix, Tucson, Mesa, and Chandler use 2024 codes, Maricopa County enforces 2018 codes, and Scottsdale’s adoption history lists 2021 codes.
Local
Status: Partial.9-802. Procedure for adoption by reference (opens in a new tab)
Arizona Legislature
azleg.gov, read Oct 17, 2026, and two more pages thereAlso cited: phoenix.gov, tucsonaz.gov, mesaaz.gov, maricopa.gov, hsd.maricopa.gov, fcd.maricopa.gov, chandleraz.gov, and ww2.scottsdaleaz.gov
- State law
State law lets cities, towns, and counties use an online permitting platform for home storage paired with solar. The line siting law defines a plant as a thermal electric, nuclear, or hydroelectric generating unit of 100 MW or more.
State law
Status: Partial.9-468. Solar construction permits; standards; definition (opens in a new tab)
Arizona Legislature
azleg.gov, read Oct 18, 2026, and five more pages there
Codes in force
The State Fire Code is the 2024 IFC. Cities and counties adopt the residential and electrical codes, and cities of 100,000 people or more can run their own fire code.
2024IFC
Arizona State Fire Code, 2024 IFC Section 1207, incorporated in Arizona Administrative Code (A.A.C.) R4-36-201 and applied under Arizona Revised Statutes (A.R.S.) 37-1383, in force from Apr 13, 2026
The State Fire Marshal enforces the State Fire Code statewide, except in cities of 100,000 people or more that adopt their own fire code by ordinance. Those cities still follow the State Fire Code in state and county owned buildings. Its fire protection and exit standards exclude dwellings of fewer than five units.
Fire code in force
Status: Verified.Arizona Administrative Code, Title 4, Chapter 36 (Supplement 26-1) (opens in a new tab)
Arizona Secretary of State
apps.azsos.gov, read Oct 18, 2026, and one more page there
Also cited: azleg.gov
The 2024 IFC took effect as the State Fire Code on Apr 13, 2026. We found no project date in A.A.C. R4-36-201 that decides the edition. Phoenix applies the 2024 Phoenix Building Construction Code to plans first submitted from Aug 1, 2025. Mesa applies its 2024 codes to permit applications submitted from Jan 8, 2026. Tucson’s 2024 building and residential codes took effect Jan 1, 2026.
Dates that decide the edition
Status: Partial.Arizona Administrative Code, Title 4, Chapter 36 (Supplement 26-1) (opens in a new tab)
Arizona Secretary of State
apps.azsos.gov, read Oct 18, 2026
Also cited: web-prod.phoenix.gov, mesaaz.gov, and tucsonaz.gov
- NFPA 855
We found no Arizona statute or rule that adopts the National Fire Protection Association (NFPA) 855 installation standard directly.
NFPA 855
Status: Partial.Arizona Administrative Code, Title 4, Chapter 36 (Supplement 26-1) (opens in a new tab)
Arizona Secretary of State
apps.azsos.gov, read Oct 18, 2026- Electrical code
Local
Electrical code
Status: Verified.9-802. Procedure for adoption by reference (opens in a new tab)
Arizona Legislature
azleg.gov, read Oct 18, 2026, and two more pages thereAlso cited: apps.azsos.gov
Arizona adopts no National Electrical Code (NEC) edition for private construction, so cities and counties adopt one by ordinance. Phoenix, Tucson, Mesa, and Chandler use the 2023 edition, and Maricopa County enforces the 2017 edition. Phoenix’s amendments to NEC (2023) do not address Articles 480, 690, 702, 705, or 706.
Electrical code
Status: Partial.9-802. Procedure for adoption by reference (opens in a new tab)
Arizona Legislature
azleg.gov, read Oct 18, 2026, and one more page thereAlso cited: phoenix.gov, tucsonaz.gov, mesaaz.gov, chandleraz.gov, and hsd.maricopa.gov
- Residential code
Local
Residential code
Status: Verified.9-802. Procedure for adoption by reference (opens in a new tab)
Arizona Legislature
azleg.gov, read Oct 18, 2026, and two more pages thereAlso cited: apps.azsos.gov
Phoenix numbers the storage section R330 in its 2024 IRC amendments and sets spacing and location rules for home units.
Residential code in Phoenix
Status: Partial.2024 International Residential Code amendments (Ordinance G-7397) (opens in a new tab)
City of Phoenix
phoenix.gov, read Oct 18, 2026, and one more page there
State framework
We found no state amendments to IFC Section 1207 or Section 1205. These state laws and rules decide where the State Fire Code applies and how local governments adopt codes and issue permits.
- State changes to the storage sections
We found no state change to IFC Section 1207 or Section 1205, so both apply as the 2024 IFC prints them. Article 3 of the State Fire Code rules modifies only IFC Sections 101.2.1 (appendices), 109.1 (appeals board), and 5601.1.3 (fireworks).
4 A.A.C. 36, Article 3 (R4-36-301 to R4-36-311)4 A.A.C. 36
Status: Partial.Arizona Administrative Code, Title 4, Chapter 36 (Supplement 26-1) (opens in a new tab)
Arizona Secretary of State
apps.azsos.gov, read Oct 18, 2026 - Cities with their own fire code
The State Fire Marshal enforces the State Fire Code throughout Arizona. A city of 100,000 people or more with a nationally recognized fire code and an ordinance assuming jurisdiction enforces its own code. The State Fire Code still governs state and county owned buildings there.
A.R.S. 37-1383(A)(5)A.R.S. 37-1383
Status: Partial.Arizona Legislature
azleg.gov, read Oct 18, 2026 - Homes of fewer than five units
The State Fire Code’s fire protection and exit standards exclude family dwellings with fewer than five residential dwelling units. Home batteries fall under local codes.
A.R.S. 37-1383(A)(2)(e)A.R.S. 37-1383
Status: Partial.Arizona Legislature
azleg.gov, read Oct 18, 2026 - State Fire Marshal plan review
The State Fire Marshal reviews plans for state and county buildings, public schools, and charter and private schools. Where no local fire code exists, it also reviews construction of all occupancy types except dwellings of fewer than five units.
A.R.S. 37-1383(B); State Fire Marshal plan review pageA.R.S. 37-1383
Status: Partial.Arizona Legislature
azleg.gov, read Oct 18, 2026Also cited: dffm.az.gov
- Fire district codes
A fire district adopts a nationally recognized fire code that the State Fire Marshal approves.
A.R.S. 48-805A.R.S. 48-805
Status: Partial.48-805. Fire district; powers and duties; definition (opens in a new tab)
Arizona Legislature
azleg.gov, read Oct 18, 2026 - Local adoption of model codes
A city or town can adopt a model code by reference without setting out its text, and a county can do the same. We found no statewide residential or electrical code for private construction, so cities and counties adopt their own.
A.R.S. 9-802; A.R.S. 11-861A.R.S. 9-802
Status: Partial.9-802. Procedure for adoption by reference (opens in a new tab)
Arizona Legislature
azleg.gov, read Oct 18, 2026, and one more page there - Online permitting for home storage
Cities, towns, and counties can use a qualified online automated permitting platform to issue permits for home storage paired with solar. Use is optional, and the law sets no deadline or size limit. Laws 2023, Chapter 33, added the option and took effect Oct 30, 2023.
A.R.S. 9-468; A.R.S. 11-323A.R.S. 9-468
Status: Partial.9-468. Solar construction permits; standards; definition (opens in a new tab)
Arizona Legislature
azleg.gov, read Oct 18, 2026, and four more pages there - Line siting definitions
The line siting law defines a plant as a thermal electric, nuclear, or hydroelectric generating unit with a nameplate rating of 100 megawatts (MW) or more. Its definitions also cover transmission lines of 115 kilovolts (kV) or more.
A.R.S. 40-360A.R.S. 40-360
Status: Partial.40-360. Line siting definitions (opens in a new tab)
Arizona Legislature
azleg.gov, read Oct 18, 2026
We found no state framework items for this profile.
Requirements by step
State requirements in the order a project meets them. The list shows only the steps for the profile you picked.
We found no state steps for this profile. City and county permits are under Local rules.
Local rules
Cities and counties adopt the residential and electrical codes and write siting rules for storage. Check the city or county before you plan a site.
- Phoenix (fire code and permits)2024 IFC, from Feb 17, 2026
Phoenix enforces the 2024 IFC with Phoenix amendments. The Phoenix Fire Department issues an over-the-counter permit for home batteries above 3 kWh and up to 27 kWh in residential Groups R-3 and R-4, for $390. Home systems above 27 kWh need plans and a construction permit. Every commercial stationary storage battery system needs plans, a $195 permit, and a $390 plan review.
Phoenix (fire code and permits)
Status: Partial.2024 Phoenix Fire Code adopted amendment packet (opens in a new tab)
City of Phoenix Fire Department
phoenix.gov, read Oct 18, 2026, and three more pages thereThe permit forms name no code edition or listing standard.
- Phoenix (residential code)2024 International Residential Code, from Aug 1, 2025
Ordinance G-7397 amends 2024 International Residential Code (IRC) Section R330, the storage section, with Phoenix spacing and location rules. Units keep 3 ft apart unless their listing or the Phoenix Fire Code allows other distances. Outdoor and exterior-wall units sit 3 ft or more from doors and windows, unless the UL 9540 listing or the Phoenix Fire Code allows less. Units can go in garages, accessory structures, utility closets, basements, and storage or utility spaces. Interior spaces need finished or noncombustible surfaces, or 5/8-inch Type X gypsum over unfinished wood framing. No unit goes in a sleeping room or in a closet or space that opens into one.
Phoenix (residential code)
Status: Partial.2024 International Residential Code amendments (Ordinance G-7397) (opens in a new tab)
City of Phoenix
phoenix.gov, read Oct 18, 2026, and one more page there - Mesa (zoning)
Zoning Ordinance Section 11-31-37 limits principal battery energy storage system (BESS) facilities of 5 MW or more to industrial districts with council-approved rezoning. Sites sit at least 1,000 ft from residential districts or uses and 400 ft from a church, park, school, or other sensitive use. Sites also sit at least 150 ft from commercial or industrial buildings. Applicants file preliminary emergency response and decommissioning plans. BESS under 5 MW that serve only the on-site owner or tenant are accessory and fall outside the section.
Mesa (zoning)
Status: Partial.City of Mesa
mesaaz.gov, read Oct 18, 2026Mesa Resolution 12441 declared this text a public record on Dec 1, 2025.
- Mesa (building and fire codes)2024 International Codes and 2023 NEC, from Jan 8, 2026
Mesa adopted the 2024 International Codes and the 2023 NEC. They apply to permit applications submitted from Jan 8, 2026. Projects already submitted, under review, or under construction are not affected.
Mesa (building and fire codes)
Status: Partial.Building code amendment (opens in a new tab)
City of Mesa Development Services
mesaaz.gov, read Oct 18, 2026 - Tucson2024 IRC and 2023 NEC, from Jan 1, 2026
Tucson lists the 2024 IFC with Tucson amendments, in a file dated Sep 1, 2024, and gives no start date for it. The 2024 IRC and the 2023 NEC took effect Jan 1, 2026.
Tucson
Status: Partial.Building Codes (opens in a new tab)
City of Tucson Planning and Development Services
tucsonaz.gov, read Oct 18, 2026 - Maricopa County (unincorporated areas)2018 codes and 2017 NEC
Maricopa County enforces the 2018 International Codes and the 2017 NEC. The Board of Supervisors approved the updated zoning ordinance, text amendment TA25001, by a 5-0 vote on Dec 10, 2025. It took effect Jan 9, 2026.
Maricopa County (unincorporated areas)
Status: Partial.Zoning ordinance update (opens in a new tab)
Maricopa County Planning and Development
maricopa.gov, read Oct 18, 2026Also cited: hsd.maricopa.gov and fcd.maricopa.gov
- Chandler and Scottsdale
Chandler lists the 2024 IFC, the 2024 IRC, and the 2023 NEC, with local amendments in its city code. Scottsdale’s code adoption history shows the 2021 IFC (Ordinance 4562), the 2021 IRC, and the 2020 NEC. We found no storage-specific amendment on either city’s pages.
Chandler and Scottsdale
Status: Partial.Directory of regulatory documents (opens in a new tab)
City of Chandler City Clerk’s Office
chandleraz.gov, read Oct 18, 2026Also cited: ww2.scottsdaleaz.gov
- Goodyear and Buckeye
Goodyear sets storage facilities 330 ft from residential development. A special use permit backed by a plume study can reduce that distance. Buckeye sets them 150 ft from existing or planned residential properties.
Goodyear and Buckeye
Status: Lead only.Arizona Technology Council
aztechcouncil.org, read Oct 18, 2026Only a secondary source says this so far. Nobody has checked it against the original yet.
No local rules recorded yet.
Laws, rules, and bills
State laws, agency rules, and bills that change what storage products must meet, how they connect, or how owners are paid.
Enacted or in force
- Signed into lawJun 19, 2026
Requires residential solar contracts to disclose costs, savings assumptions, and warranties, including inverter and battery warranties. Lease payments cannot start before the utility grants permission to operate. Contractors must evaluate the roof before installation and meet the registrar’s training standards.
SB 1419, 57th Legislature, 2nd Regular Session (2026); Laws 2026, Chapter 175 (amends A.R.S. 44-1761, 44-1762, and 44-1763); Effective Sep 12, 2026SB 1419
Status: Partial.Laws 2026, Chapter 175 (opens in a new tab)
Arizona State Legislature
azleg.gov, read Oct 18, 2026 - In forceApr 13, 2026
Adopts the 2024 International Fire Code, with state amendments, as the State Fire Code. Its energy systems chapter covers battery storage and solar where the State Fire Code applies.
A.A.C. R4-36-201, amended by final rulemaking at 32 A.A.R. 558 (Supp. 26-1)A.A.C. R4-36-201
Status: Partial.Arizona Administrative Code, Title 4, Chapter 36 (Supplement 26-1) (opens in a new tab)
Arizona Secretary of State
apps.azsos.gov, read Oct 18, 2026 - AdoptedSep 23, 2025
Allows rooftop solar on homes and parking structures, and battery storage at homes and businesses only when stored energy is used on site. Uses not listed as permitted in a zoning district are not allowed.
Town of Chino Valley Ordinance No. 2025-956 (amends Town Code Chapter 154, Unified Development Ordinance)Chino Valley Ordinance 2025-956
Status: Partial.Ordinance No. 2025-956 (opens in a new tab)
Town of Chino Valley
chinovalleyaz.gov, read Oct 18, 2026 - AdoptedMar 12, 2025
Approves an Arizona Public Service pilot that pays up to 5,000 home battery owners $110 per kW a year for up to 60 grid events. Events run from 4 to 10 in the evening, May through October.
Arizona Corporation Commission approval of the APS Bring-Your-Own-Device battery pilot (Mar 12, 2025)Arizona Public Service battery pilot
Status: Partial.News release, Mar 13, 2025 (opens in a new tab)
Arizona Corporation Commission
azcc.gov, read Oct 18, 2026 - In forceNov 5, 2017
Defines commercial contractor license classes; electrical work under 600 volts falls under C-11, and no class covers solar electric or battery work specifically. Classes that name solar cover plumbing, water heating, cooling, pool, and boiler work.
A.A.C. R4-9-102 (commercial license classifications; residential in R4-9-103, dual in R4-9-104)A.A.C. R4-9-102
Status: Partial.Arizona Administrative Code, Title 4, Chapter 9 (opens in a new tab)
Arizona Secretary of State
apps.azsos.gov, read Oct 18, 2026 - In force
Requires battery systems in Salt River Project’s residential program to be Listed to UL 9540, with inverters that meet UL 1741 and IEEE 1547. Customers must take a customer generation price plan and sign an interconnection agreement.
Salt River Project, Residential Distributed Energy Resource Program Requirements (form 1589200, rev. 01/24)Salt River Project requirements
Status: Partial.Residential Distributed Energy Resource Program Requirements (opens in a new tab)
Salt River Project
srpnet.com, read Oct 18, 2026 - In force
Requires sale and lease agreements for distributed energy generation systems to disclose major components, such as batteries, and their warranties. They must also disclose total costs, maintenance, and savings assumptions. Buyers may rescind within three business days, and lease payments cannot start before the utility grants permission to operate.
A.R.S. 44-1763 (with definitions in 44-1761 and installation standards in 44-1762)A.R.S. 44-1763
Status: Partial.Arizona Revised Statutes (opens in a new tab)
Arizona State Legislature
azleg.gov, read Oct 18, 2026 - In force
Requires the Department of Revenue to value utility-scale renewable and storage equipment at 20 percent of depreciated cost for property tax through Dec 31, 2040. Stand-alone and colocated storage both qualify.
A.R.S. 42-14155A.R.S. 42-14155
Status: Partial.Arizona Revised Statutes (opens in a new tab)
Arizona State Legislature
azleg.gov, read Oct 18, 2026 - In force
Lets county boards of supervisors create renewable energy incentive districts for utility-scale renewable and storage equipment. District plans may offer faster zoning and permits, and waivers of fees or standards.
A.R.S. 11-254.07A.R.S. 11-254.07
Status: Partial.Arizona Revised Statutes (opens in a new tab)
Arizona State Legislature
azleg.gov, read Oct 18, 2026 - In force
Requires utility approval before construction and permission to operate before a home solar or storage system is energized. Inverters must meet IEEE 1547 and be Listed to UL 1741, and storage follows the utility’s SR-710 requirements. Applications filed before Oct 1 each year lock in the Resource Comparison Proxy export rate then in effect.
Tucson Electric Power, Residential Interconnection Application Process, including Interconnection Requirements for Distributed Energy Storage Systems, Single-Phase (SR-710)Tucson Electric Power interconnection
Status: Partial.Residential interconnection (opens in a new tab)
Tucson Electric Power
tep.com, read Oct 18, 2026
Did not become lawthree bills
- Did not pass
Would have valued utility renewable and storage equipment placed in service after Dec 31, 2026 at full depreciated cost for property tax. Equipment placed in service earlier would have kept the 20 percent valuation.
HB 2918, 57th Legislature, 2nd Regular Session (2026)HB 2918
Status: Partial.Introduced bill text (opens in a new tab)
Arizona State Legislature
azleg.gov, read Oct 18, 2026 - Did not pass
Would have required solar power plant owners to file decommissioning plans and keep financial assurance. Owners would have had to remove equipment, including battery storage, after a year out of operation. Cities and counties could have set zoning and permit rules for these plants.
HB 2781, 57th Legislature, 2nd Regular Session (2026)HB 2781
Status: Partial.Introduced bill text (opens in a new tab)
Arizona State Legislature
azleg.gov, read Oct 18, 2026 - Vetoed
Would have barred utilities and public bodies from connecting certain equipment from Chinese companies to critical infrastructure. The Corporation Commission would have listed the barred equipment, including solar inverters and battery technology.
HB 2134, 57th Legislature, 2nd Regular Session (2026)HB 2134
Status: Partial.Senate fact sheet (opens in a new tab)
Arizona State Senate
azleg.gov, read Oct 18, 2026
We found no state laws or bills for this product profile.
What changes between editions
The State Fire Code is the 2024 IFC from Apr 13, 2026. These rows show what changed for storage from the 2021 to the 2024 edition.
Large-scale fire testing
- IFC2021 to 2024
A test report to UL 9540A would state how long the unit contained a fire, with no tie to a fire-resistance rating. The UL 9540 listing rule stays, with exceptions for telecom, utility direct current, and standby lead-acid or nickel-cadmium systems.
IFC (2021) Sections 1207.1.5 and 1207.3.1, revised by ICC proposals F136-21 and F140-21Large-scale fire testing (IFC)
Status: Partial.Washington State Building Code Council
sbcc.wa.gov, read Oct 17, 2026From ICC proposals F136-21 and F140-21, which revise 2021 IFC Sections 1207.1.5 and 1207.3.1.
Scope and technology tables
- IFC2021 to 2024
ICC lists 2024 changes for storage under utility control, the technology tables, and a new Section 1107 for existing lithium-ion systems. The proposals would bring utility-controlled storage into Chapter 12 and add nickel-zinc, zinc-manganese dioxide, and sodium nickel chloride batteries.
IFC (2024) Sections 1201.1, 1207.1, and 1107 and Tables 1207.1.3, 1207.5, and 1207.6; ICC proposals F122-21, F142-21 to F144-21, and F147-21Scope and technology tables (IFC)
Status: Partial.ICC guide to 2024 IFC changes (table of contents) (opens in a new tab)
International Code Council
shop.iccsafe.org, read Oct 17, 2026Also cited: sbcc.wa.gov
From ICC’s list of changed sections and proposals F122-21, F142-21 to F144-21, and F147-21.
Spacing and siting
- IFC2021 to 2024
The proposals keep groups of electrochemical units at 50 kWh, with 3 ft to other groups and walls. Large-scale test data can justify larger groups or closer spacing. They would bar these systems more than 75 ft above fire department vehicle access or below the lowest exit discharge.
IFC (2024) Section 1207.5; ICC proposals F142-21 to F144-21 and F147-21; NFPA 855 (2020) Sections 4.6.6 and 4.6.7 and Table 4.8Spacing and siting (IFC)
Status: Partial.Washington State Building Code Council
sbcc.wa.gov, read Oct 17, 2026From ICC proposals F142-21 to F144-21 and F147-21. NFPA 855 (2020) sets the same group limit and spacing. Check the 50 kWh, 3 ft, and 75 ft limits against Section 1207.5 of the published 2024 IFC.
Explosion control
- IFC2021 to 2024
The 2021 IFC applies explosion control to storage rooms, areas, and walk-in units, through NFPA 69 prevention or NFPA 68 venting. A proposal would extend it to all electrochemical systems, cabinets included. Waivers would apply where large-scale tests show no flammable gas or no ejected debris. A third waiver covers documentation that gas stays under 25 percent of the lower flammable limit during faults.
IFC (2021) Section 1207.6.3 and Section 911, revised by ICC proposal F151-21Explosion control (IFC)
Status: Partial.Fire Code Recommendations report, v1 (Jul 2024) (opens in a new tab)
New York State Inter-Agency Fire Safety Working Group
nyserda.ny.gov, read Oct 17, 2026Also cited: sbcc.wa.gov
From New York’s working group report and ICC proposal F151-21, which revises 2021 IFC Section 1207.6.3. Check the three waivers in Section 1207.6.3 of the published 2024 IFC.
Hazard mitigation analysis
- IFC2021 to 2024
A proposal would rework the hazard mitigation analysis and let the fire code official require one. The analysis would study single failures, such as thermal runaway in one unit. It would pass if fire stays contained in unoccupied rooms for the rated separation time and occupants can evacuate. It would drop the criteria for toxic gas levels and for flammable gas without a fault.
IFC (2021) Sections 1207.1.4 and 1201.3, revised by ICC proposals F135-21 and F126-21Hazard mitigation analysis (IFC)
Status: Partial.Washington State Building Code Council
sbcc.wa.gov, read Oct 17, 2026, and one more page thereFrom ICC proposals F135-21 and F126-21, which revise 2021 IFC Sections 1207.1.4 and 1201.3. Washington’s code council lists Section 1207 as changed in 2024. Compare Section 1207.1.4 of the published 2024 IFC with F135-21 as written.
Fire detection and suppression
- IFC2021 to 2024
ICC lists a 2024 change to storage sprinklers in Section 1207.5.5. A proposal would set a sprinkler density of 0.3 gallons per minute per square foot for groups up to 50 kWh. It covers the smaller of the fire area or 2,500 square feet, and larger groups would follow test data. Another proposal would require smoke or radiant-energy detection with monitored alarms, and radiant-energy detection in open parking garages and on rooftops.
IFC (2024) Sections 1207.5.5 and 1207.5.4; ICC proposals F145-21 and F146-21Fire detection and suppression (IFC)
Status: Partial.ICC guide to 2024 IFC changes (table of contents) (opens in a new tab)
International Code Council
shop.iccsafe.org, read Oct 17, 2026Also cited: sbcc.wa.gov and nyserda.ny.gov
From ICC’s list of changed sections and proposals F145-21 and F146-21. Look up the sprinkler density in Section 1207.5.5 of the published 2024 IFC.
Emergency planning
- IFC2021 to 2024
Proposals would put a fire safety and evacuation plan in the permit documents and protect utility-owned plans as critical infrastructure records. Another would require fire mitigation personnel to be dispatched within 15 minutes.
IFC (2021) Section 404 and Chapter 12, revised by ICC proposals F133-21, F134-21, and F137-21Emergency planning (IFC)
Status: Partial.Washington State Building Code Council
sbcc.wa.gov, read Oct 17, 2026From ICC proposals F133-21, F134-21, and F137-21. Check the 15-minute dispatch wording in the published 2024 IFC.
Commissioning and decommissioning
- IFC2021 to 2024
ICC lists a changed commissioning plan in Section 1207.2.1. A proposal would require the plan to be approved before commissioning and to hold 12 elements, including integrated fire safety testing and staff training. Its decommissioning plan would cover shutdown, notice to officials, and intact and fire-damaged systems.
IFC (2024) Section 1207.2.1; ICC proposal F138-21; NFPA 855 (2020) Sections 6.1.1.2, 8.1.1, and 8.1.2Commissioning and decommissioning (IFC)
Status: Partial.ICC guide to 2024 IFC changes (table of contents) (opens in a new tab)
International Code Council
shop.iccsafe.org, read Oct 17, 2026Also cited: sbcc.wa.gov
From ICC proposal F138-21. NFPA 855 already has commissioning and decommissioning rules.
Residential limits
- IFC2021 to 2024
ICC lists Section 1207.11, for Groups R-3 and R-4, as changed. A proposal would cap each unit at 20 kWh. Totals would be 40 kWh in utility or storage spaces and 80 kWh in garages or accessory structures. Units would sit 3 ft apart unless large-scale tests allow less, and none would go in sleeping rooms or closets that open off them. Unfinished wood-frame walls would need 5/8 in. Type X gypsum board.
IFC (2024) Section 1207.11; ICC proposal F153-21Residential limits (IFC)
Status: Partial.ICC guide to 2024 IFC changes (table of contents) (opens in a new tab)
International Code Council
shop.iccsafe.org, read Oct 17, 2026Also cited: sbcc.wa.gov
From ICC proposal F153-21, whose reason says it matches the 2021 IRC. Confirm the 20, 40, and 80 kWh limits in Section 1207.11 of the published 2024 IFC.
Residential alarms and impact protection
- IFC2021 to 2024
One proposal would add smoke alarms, or an interconnected listed heat alarm where smoke alarms cannot go. Another would protect garage units in the vehicle path with bollards, wheel barriers, or a method that resists 2,000 pound-force at 24 in. Units mounted 36 in. or more above the floor are exempt where the garage opening is 7 ft 6 in. or lower.
IFC (2024) Section 1207.11; ICC proposals F154-21 and F155-21Residential alarms and impact protection (IFC)
Status: Partial.Washington State Building Code Council
sbcc.wa.gov, read Oct 17, 2026From ICC proposals F154-21 and F155-21.
We found no edition changes for this profile.
Coming next
Dates ahead for this state’s codes, its storage laws, and the standards they cite, earliest first.
- Dec 5, 2026
AdoptedThe Office of Manufactured Housing adopted the 2024 International Codes for factory-built buildings and manufactured homes, in force from Dec 5, 2026.
Manufactured housing codes
Status: Lead only.Arizona adopts 2024 building codes (opens in a new tab)
ICC-NTA
icc-nta.org, read Oct 17, 2026Only a secondary source says this so far. Nobody has checked it against the original yet.
- Jan 1, 2027
PublishedA UL Solutions page says the sixth edition of UL 9540A takes effect Jan 1, 2027. It always adds an installation-level large-scale fire test with pass-fail criteria. The fifth edition could stop at unit level when its criteria were met.
UL 9540A, 6th edition
Status: Lead only.Page on UL 9540A and NFPA 855 (opens in a new tab)
UL Solutions Code Authority
ul.comAlso cited: industryweek.com
An article sponsored by CSA Group gives a Mar 13, 2026, publication date. No publisher page confirmed the edition or its dates.
- No date announced
ProposedMaricopa County proposes the 2024 IRC, other 2024 International Codes, and the 2023 NEC to replace its 2018 codes and 2017 NEC. Its Building Code Advisory Board met Jul 14, 2026. The advisory board set a second meeting for Aug 11, 2026, to recommend adoption to the Board of Supervisors.
Maricopa County 2024 codes
Status: Partial.Special meeting agenda for Jul 14, 2026 (opens in a new tab)
Maricopa County Building Code Advisory Board
maricopa.gov, read Oct 18, 2026Also cited: hsd.maricopa.gov
Sources
Every source a claim on this page cites, primary sources first.