Arizona vs Washington: Local Ordinance Comparison (2026)

ADU Rules

Arizona SB-1161 (2024) preempts municipalities with populations over 75,000, requiring them to permit accessory dwelling units on single-family lots and limiting restrictive zoning, owner-occupancy, and parking mandates.

Washington HB 1337 (RCW 36.70A.681) requires cities and counties to allow two ADUs per lot in urban growth areas, preempting restrictive local rules.

Shed Rules

Washington adopts the International Residential Code statewide; detached one-story sheds 200 square feet or less are exempt from building permits.

Tiny Homes

Washington recognizes tiny houses on foundations under IRC Appendix Q and tiny houses on wheels as recreational vehicles under RCW 35.21.686.

Animal Hoarding

Arizona criminalizes animal cruelty statewide under A.R.S. Section 13-2910, which covers neglect and inadequate care typical in hoarding cases, and applies uniformly in every jurisdiction.

Washington RCW 16.52 criminalizes animal cruelty and neglect statewide, providing the legal foundation for animal hoarding prosecutions when owners fail to provide necessary food, water, shelter, and veterinary care to multiple animals.

Beekeeping

Arizona requires every beekeeper to register apiaries with the State Department of Agriculture, regardless of city rules, and follows uniform statewide pest and disease management standards.

Washington RCW 15.60 requires all beekeepers with one or more hives to register their apiaries annually with the Washington State Department of Agriculture, supporting disease tracking and pollinator health statewide.

Breed Restrictions

Washington RCW 16.08 governs dangerous and potentially dangerous dogs through behavior-based standards rather than breed identity, requiring registration, secure confinement, and liability insurance for declared dangerous dogs across all jurisdictions.

Chickens & Livestock

Arizona generally leaves chicken and livestock keeping to municipal zoning, but state law protects agricultural operations on land zoned or used for farming under the Right to Farm Act.

Dog Leash Laws

Arizona requires all dogs to be on a leash no longer than six feet whenever off the owner's property, and enforces statewide rabies licensing for dogs over three months old.

Exotic Pets

Arizona Game and Fish Commission rules apply uniformly statewide and prohibit private possession of restricted live wildlife including big cats, primates, alligators, and venomous reptiles without a special license.

Washington RCW 16.30 prohibits private possession, breeding, and importation of dangerous wild animals including big cats, bears, wolves, and primates, applying uniformly statewide with limited grandfather and accreditation exceptions.

Wildlife Feeding

Arizona prohibits intentionally feeding wildlife in Maricopa and Pima counties under state law, with exceptions for birds and tree squirrels, and Game and Fish rules apply statewide for predators.

Structure Height Limits

Washington adopts the International Building Code statewide through chapter 51-50 WAC, setting maximum heights and stories tied to construction type and occupancy classifications.

Juvenile Curfew

Washington does not impose a statewide juvenile curfew; cities may enact local curfews under general police powers, subject to constitutional limits.

Commercial Drones

Arizona commercial drone pilots operate under FAA Part 107 and ARS 13-3729 state rules, with cities barred from imposing separate licensing or operational regulations.

Commercial drone operations in Washington are governed by FAA Part 107, with state law adding criminal liability for invasive uses and limited authority over state-owned land.

Coastal Development

Washington's Shoreline Management Act (RCW 90.58) requires Shoreline Substantial Development Permits for most construction within 200 feet of marine and freshwater shorelines statewide.

Flood Zones

Arizona statutorily delegates floodplain regulation to counties and flood control districts, setting uniform minimum standards for development in mapped floodplains statewide.

Washington requires all communities participating in the National Flood Insurance Program to adopt floodplain ordinances meeting state minimum standards under RCW 86.16.

Stormwater Management

Arizona regulates stormwater discharges through the AZPDES program under ARS Title 49, requiring permits for construction, industrial, and municipal stormwater statewide.

Washington Department of Ecology administers federally-required NPDES stormwater permits statewide, setting minimum standards for municipal, construction, and industrial stormwater that all jurisdictions must implement.

Neighbor Fence Rules

Washington's partition fence law requires adjoining landowners using a boundary fence for livestock to share construction and maintenance costs equitably under RCW 16.60.

Pool Barriers

Arizona enforces a uniform statewide swimming pool enclosure law requiring barriers around residential pools, with cities and counties bound to minimum standards but allowed to adopt stricter local rules.

Washington requires pool barriers for residential and public pools through state-adopted building code provisions and Department of Health rules ensuring minimum 48-inch fencing.

Fireworks

A.R.S. 36-1606 limits Arizona municipalities to regulating only the use, not sale, of permissible consumer fireworks and prohibits aerial fireworks statewide.

Washington restricts consumer fireworks to specific dates and types under RCW 70.77. State law sets minimum standards, prohibits illegal aerials, and allows local governments to enact stricter rules but not weaker ones.

Outdoor Burning

Arizona regulates open burning through ADEQ air quality rules and DFFM forestry statutes, requiring permits for most outdoor burns and prohibiting burns during no-burn declarations.

Washington's Clean Air Act (RCW 70A.15) bans outdoor burning in urban growth areas and most cities. The Department of Ecology and clean air agencies enforce statewide standards regardless of local rules.

Wildfire Zones

Arizona Department of Forestry and Fire Management designates wildland-urban interface areas under A.R.S. 37-1301 and issues statewide fire restrictions during high-risk conditions.

Washington adopted the International Wildland-Urban Interface Code statewide under RCW 19.27. New construction in designated WUI areas must meet ignition-resistant building, defensible space, and water supply requirements.

Concealed Carry

Arizona allows permitless concealed carry for adults 21 and older, while still issuing optional CCW permits that enable reciprocity with other states.

Washington issues concealed pistol licenses under RCW 9.41.070 on a shall-issue basis to qualified applicants, with statewide preemption preventing local concealed carry rules.

Firearms in Vehicles

Arizona allows adults 21 and older to carry loaded firearms openly or concealed in private vehicles without a permit, subject to limited restrictions.

Washington RCW 9.41.050 governs carrying firearms in vehicles statewide, requiring a concealed pistol license to carry a loaded handgun in a motor vehicle.

Local Firearms Preemption

Arizona broadly preempts cities, towns, and counties from regulating firearms, ammunition, components, and related accessories beyond state law.

Washington RCW 9.41.290 broadly preempts local firearm regulation, reserving authority over firearm laws to the state legislature with very limited exceptions.

Open Carry

Arizona permits open carry of firearms by adults 18 and older without a license in most public spaces, subject to limited location restrictions.

Washington allows open carry of firearms by qualified adults without a permit, with limited statutory restrictions and broad preemption barring most local open carry rules.

Food Truck Permits

Arizona Department of Health Services regulates mobile food units statewide under A.R.S. Title 36, Chapter 8 and uniform food code rules in A.A.C. Title 9, applied through county health permits.

Washington WAC 246-215 enforced under RCW 43.20 establishes the statewide retail food code requiring mobile food units including food trucks to obtain permits from local health jurisdictions and meet uniform sanitation standards.

Assessment & Dues

Under A.R.S. § 33-1807, unpaid assessments in an Arizona planned community become an automatic lien on the lot, and the association may charge late fees and interest if the declaration allows. The lien may be foreclosed like a mortgage, but only once the owner is delinquent 18 months or owes $10,000 or more.

Washington has two regimes. Communities created on or after July 1, 2018 fall under WUCIOA (RCW 64.90), whose lien carries a 6-month super-priority over first mortgages and can be foreclosed like a mortgage. Older associations use the Homeowners' Associations Act (RCW 64.38), whose lien may be foreclosed only after strict notice and dollar thresholds.

CC&R Enforcement

Arizona HOAs enforce CC&Rs, design rules, and bylaws, but A.R.S. § 33-1803 channels enforcement through a detailed violation-notice process. A member who gets a violation notice may demand, within 21 days, the specific provision violated, the date, who observed it, and how to contest — and the HOA cannot collect attorney fees until it provides this.

Washington HOAs may adopt and enforce rules and architectural standards and enforce the recorded declaration. Under WUCIOA, RCW 64.90.405 authorizes rule adoption and enforcement, while RCW 64.90.510 fixes outer limits the rules cannot cross (flags, solar, signs). Older HOAs draw the same rulemaking power from RCW 64.38.020.

HOA Fines & Enforcement

A.R.S. § 33-1803 lets an Arizona HOA board impose 'reasonable monetary penalties' for violations of the declaration, bylaws, and rules — but only 'after notice and an opportunity to be heard.' The statute also caps any late charge on an unpaid penalty at the greater of $15 or 10% of the penalty.

Both Washington regimes let HOAs impose reasonable fines, but only after notice and an opportunity to be heard and only under a fine schedule already adopted by the board and furnished to owners. WUCIOA communities use RCW 64.90.405; older associations use RCW 64.38.020. Neither statute sets a dollar cap on fines.

Sanctuary Policy Preemption

Arizona law prohibits any city, county, or agency from limiting cooperation with federal immigration authorities, effectively banning sanctuary policies statewide.

Washington's Keep Washington Working Act under RCW 10.93.160 limits state and local cooperation with federal immigration enforcement, establishing statewide sanctuary protections.

Composting

Washington requires jurisdictions over 25,000 to provide organics collection and bans certain organic waste disposal under RCW 70A.205.545.

Native Plants

The Arizona Native Plant Law protects designated cacti, trees, and other species from destruction or removal without state permits, applying universally on private and public land regardless of municipal rules.

Rainwater Harvesting

Arizona explicitly authorizes rainwater harvesting under state policy and provides income tax credits for systems, preventing municipalities from banning residential collection of rooftop or runoff rainwater.

Washington law expressly permits rooftop rainwater collection for onsite use without a water right permit, preempting any municipal prohibition on basic harvesting.

Tree Removal & Heritage Trees

Arizona protects native trees such as ironwood, mesquite, and palo verde under the Native Plant Law, requiring state permits and notice before removal even on private residential property.

Washington Forest Practices Act (RCW 76.09) regulates commercial timber harvest statewide; nonconversion harvests require state-issued permits.

Weed Ordinances

Washington RCW 17.10 mandates statewide control of designated noxious weeds; landowners must prevent spread regardless of municipal location.

Aircraft Noise

Aircraft noise in Washington is preempted by federal aviation law, and the state expressly excludes aircraft in flight from its noise control regulations under WAC 173-60-050.

Amplified Music & Events

Amplified music in Washington is regulated under the statewide Maximum Environmental Noise Levels, which set decibel caps at the property line based on receiving zone and time of day.

Construction Hours

Washington's noise code exempts temporary construction sounds during daytime hours from EDNA limits, while night construction still must comply with strict nighttime sound levels.

Industrial Noise

Industrial sources in Washington must comply with EDNA limits set by WAC 173-60, with the receiving residential zone limited to 60 dBA daytime and 50 dBA nighttime.

Quiet Hours

Washington's Noise Control Act sets statewide maximum environmental noise levels by zone, with stricter nighttime limits between 10 p.m. and 7 a.m. that apply to all jurisdictions.

Dark Sky Rules

Arizona regulates outdoor lighting statewide through the Outdoor Light Control statutes, requiring shielded fixtures and limits on certain lamp types, particularly in counties hosting major astronomical observatories.

Abandoned Vehicles

Arizona Revised Statutes Title 28 establishes uniform statewide procedures for abandoned vehicle reporting, towing, notice to owners, and disposal through licensed agents.

Washington's RCW 46.55 governs how abandoned vehicles are impounded, noticed, redeemed, and auctioned, providing a uniform statewide framework that local jurisdictions must follow.

Security Deposit Rules

Arizona caps security deposits at one and one-half month's rent. After the tenancy ends and the tenant requests it, a landlord has 14 days (excluding weekends and legal holidays) to return the deposit with an itemized list of deductions. Wrongful retention exposes the landlord to damages of twice the amount withheld.

Washington sets no dollar cap on residential security deposits, but it controls how they are collected and returned. A landlord may collect a deposit only with a written rental agreement and a written move-in checklist describing the unit's condition. After the tenancy ends, the landlord has 30 days to refund the deposit with an itemized statement of deductions.

Squatter's Rights & Adverse Possession

Arizona's adverse possession periods are tiered: 2 years by right of possession alone (A.R.S. § 12-522), 3 years under color of title (§ 12-523), 5 years under a recorded deed with taxes paid (§§ 12-524, 12-525), and a 10-year catch-all (§ 12-526). Possession must be open, hostile, and continuous; removal is by court action.

Washington's general adverse possession period is 10 years under RCW 4.16.020, requiring possession that is actual, open and notorious, exclusive, hostile, and continuous. A shorter 7-year period applies under RCW 7.28.070 when the occupant holds under good-faith color of title and pays all taxes legally assessed on the land for those seven years.

Agricultural Zoning Protection

Arizona limits local zoning power over agricultural land, protecting commercial farming activities from overly restrictive land-use regulation.

Washington's Growth Management Act under RCW 36.70A.170 requires counties and cities to designate and protect agricultural lands of long-term commercial significance through zoning.

Farm Nuisance Protection

Arizona's Right to Farm Act in ARS 3-112 protects established agricultural operations from nuisance suits when surrounding land use changes.

Washington RCW 7.48.305 protects established agricultural activities from nuisance lawsuits when operations existed before nearby nonagricultural land uses changed the area.

Insurance Requirements

A.R.S. 9-500.39 requires Arizona short-term rental operators to maintain at least $500,000 in liability insurance or rent through a marketplace providing equivalent coverage.

Washington law requires short-term rental operators to maintain primary liability insurance of at least $1 million or operate through a platform that provides equivalent coverage. This statewide requirement applies regardless of local rules.

Noise Rules

A.R.S. 9-500.39 lets Arizona cities apply local noise ordinances to short-term rentals and impose escalating penalties for verified noise violations occurring on the premises.

Occupancy Limits

A.R.S. 9-500.39 lets Arizona cities cap nightly occupancy at two adults per bedroom plus additional persons, applying uniformly to short-term rentals statewide.

Permit Requirements

Arizona law limits how cities regulate short-term rentals but allows local licensing, emergency contact registration, and basic operational standards under A.R.S. 9-500.39.

Taxes & Fees

Arizona requires short-term rental operators to license with the Department of Revenue and remit transaction privilege tax plus any applicable county and city transient lodging taxes statewide.

Washington imposes statewide sales tax and lodging taxes on short-term rental stays under 30 days. Operators must register with the Department of Revenue, collect applicable taxes, and remit them regardless of local jurisdiction.

Political Signs

Arizona state law preempts municipal restrictions on temporary political signs in public rights-of-way during election periods, limiting what cities and counties can prohibit or remove.

Washington courts protect political signs as core First Amendment speech, and state law restricts how local governments may regulate temporary political signage on private property.

Plastic Straw Rules

Arizona's auxiliary container preemption blocks cities and counties from banning, taxing, or regulating plastic straws and stirrers.

Washington RCW 70A.550 limits single-use food service ware including plastic straws and utensils to upon-request distribution at restaurants and food service businesses.

Polystyrene Foam Rules

Arizona preempts local bans and fees on polystyrene foam food containers as auxiliary containers under ARS 9-500.38 and ARS 11-269.16.

Washington RCW 70A.245 bans expanded polystyrene foam food service containers, packing peanuts, and coolers in phases starting June 2024 to combat plastic pollution.

HOA Restrictions

Arizona law voids HOA covenants that effectively prohibit solar energy devices, preempting community restrictions and requiring associations to allow reasonable installations under A.R.S. Section 33-1816.

Washington RCW 64.38.055 voids homeowner association covenants prohibiting solar panel installation on owner property statewide, while permitting only reasonable placement rules that do not significantly impair efficiency or increase cost.

Panel Permits

Arizona requires expedited residential solar permitting under SolarAPP+ adoption laws and provides statewide property tax exemptions for residential solar energy devices under A.R.S. Section 42-11054.

Washington RCW 64.38.055 and RCW 64.90.510 prevent HOAs and condominium associations from prohibiting solar panels, while RCW 35.21.700 limits local government ability to ban solar collectors on residential property.

No-Knock Registry

Washington's Commercial Telephone Solicitation Act (RCW 19.158) and Consumer Protection Act govern unwanted commercial solicitation. State law preempts certain telephone solicitation rules and provides statewide remedies against deceptive practices.

Fencing Requirements

Arizona sets uniform minimum pool barrier requirements under A.R.S. Section 36-1681 for any new residential pool deeper than 18 inches, applicable in counties with populations over 250,000.

Washington WAC 246-260 enforced under RCW 70.90 requires public swimming pools, including those at apartments, hotels, and HOAs, to maintain barriers at least four feet high with self-closing self-latching gates statewide.

Safety Rules

Arizona aligns with the federal Virginia Graeme Baker Pool and Spa Safety Act and enforces state barrier laws, applying uniformly to public and certain private pools throughout the state.

Washington RCW 70.90 and WAC 246-260 establish statewide operational safety rules for public pools including water quality, signage, lifeguard or warning sign requirements, and anti-entrapment drain compliance under federal VGB Act.

Vape Retail Rules

Arizona requires retailers to verify ID and bars sales of vapor products and e-cigarettes to anyone under 21 under ARS 36-798.03.

Washington RCW 70.345 requires licensing for vapor product retailers, distributors, and delivery sellers, with state Department of Revenue oversight and tax collection.

Recycling Requirements

Washington requires curbside recycling availability in urban areas under RCW 70A.205 and mandates organics collection for businesses under RCW 70A.205.545. Counties and cities must implement state-mandated waste reduction plans.

Tree Removal Permits

Washington's Forest Practices Act (RCW 76.09) governs commercial timber harvest on forestlands statewide through Department of Natural Resources permits. Cities cannot regulate qualifying forest practices that follow state class IV applications.