Arizona Regulations: Counties & Municipal Zoning Guide
Arizona is one of the more tiny-home-friendly states in the Southwest. The state defines a tiny house as a dwelling smaller than 400 square feet and has broadly adopted Appendix Q of the 2018 International Residential Code (IRC), which sets the framework for tiny home construction. Most Arizona counties enforce a minimum tiny home size somewhere between 170 and 296 square feet (depending on the county), with a minimum ceiling height of 6’4″. Tiny homes built on permanent foundations are permitted in detached single-family, multifamily, and accessory dwelling unit (ADU) zones across most of Arizona thanks to the state’s relatively lenient zoning posture. Tiny homes on wheels (THOWs) and park model homes — built to ANSI A119.5 / RVIA standards — are classified as recreational vehicles, and full-time residency is generally limited to RV parks, manufactured home communities, or licensed tiny home villages, though some counties accommodate them on private land with a permanent foundation. All tiny homes require building permits and must pass inspections to receive a Certificate of Occupancy. Beyond the state framework, individual cities (Phoenix, Tucson, Mesa, Chandler, Gilbert) layer on additional zoning rules. Note: Arizona has significant tribal land within its borders — sovereign tribal lands have separate regulatory frameworks and are not covered by county zoning. The guide below walks you through every Arizona county and key municipality to help you confidently plan and place your tiny cabin.
Counties
Yes. Apache County publishes specific tiny house requirements and follows the International Residential Code (IRC) framework. Tiny homes must meet the county’s published square footage and ceiling height minimums, obtain proper building permits, and pass all required inspections before occupancy. Apache County is in eastern Arizona, bordering New Mexico, and includes significant high-elevation terrain plus portions of the Navajo and Apache nations (which have separate sovereign regulations). Contact the Community Development Department for specifics.
Resources: Apache County Tiny House Requirements
Yes. Cochise County is one of Arizona’s most tiny-home-friendly counties — it follows Appendix Q of the 2018 IRC. Tiny homes must be a minimum of 296 square feet with a minimum ceiling height of 6’4″. Building permits and inspections are required to obtain a Certificate of Occupancy. The county’s southeastern Arizona location and rural character make it a popular choice for tiny homeowners.
Resources: Cochise County Tiny Home FAQ
Yes. Coconino County (home to Flagstaff and the area around the Grand Canyon) has adopted the 2018 International Building Code and defines a tiny house as any home smaller than 600 square feet — a more generous definition than most AZ counties. Minimum ceiling height is 6’4″. Homes can be site-built, partially site-built, or placed on an approved trailer. High-elevation snow load and weather considerations apply to building design. Permits and inspections required.
Resources: Coconino County Tiny Home Guide
Yes. Gila County allows tiny homes provided they comply with building codes and zoning regulations. Maximum tiny home size is 500 square feet with a minimum ceiling height of 6’4″. Building permits and inspections are required to obtain a Certificate of Occupancy. Contact Gila County Community Development for the latest requirements specific to your property.
Resources: Gila County ADU Ordinance
Yes. Graham County follows the IRC framework. Tiny homes can generally be up to 400 square feet with a minimum ceiling height of 6’4″. Building permits and inspections required for a Certificate of Occupancy. Contact the Graham County Planning & Zoning Department for the most current property-specific information.
Resources: Graham County Planning & Zoning
Yes. Greenlee County mandates the IRC framework — tiny homes can be up to 400 square feet with at least a 6’4″ ceiling. Building permits and inspection compliance required to obtain a Certificate of Occupancy. As one of Arizona’s smallest and most rural counties (population around 9,500), Greenlee has flexible zoning outside incorporated areas. Contact Planning & Zoning for specifics.
Resources: Greenlee County Government
Yes. La Paz County allows tiny homes following Arizona’s state regulations — generally between 200 and 400 square feet with a minimum ceiling height of 6’4″. The county adheres to the IRC, requiring building permits and passed inspections for a Certificate of Occupancy. La Paz, on Arizona’s western border with California, has flexible rural zoning. Contact the Planning & Zoning department for specifics.
Resources: La Paz County Building Codes
Yes. Maricopa County (home to Phoenix and the surrounding metro area) follows the IRC. Tiny homes must be between 200 and 400 square feet with proper insulation and a minimum ceiling height of 6’4″. Building permits and inspections required to obtain a Certificate of Occupancy. As Arizona’s largest county by population, Maricopa has multiple distinct zoning authorities — Phoenix, Mesa, Chandler, Gilbert, Scottsdale, and other cities each have additional rules layered on top of the county framework.
Resources: Maricopa County Tiny Home Guidance
Yes. Mohave County has one of the most generous tiny home minimum sizes in Arizona — just 170 square feet, with a minimum ceiling height of 6’4″. Tiny homes require all necessary permits and must pass inspections to obtain a Certificate of Occupancy. Mohave is a large, sparsely populated northwestern county with flexible rural zoning, popular with off-grid tiny homeowners.
Resources: Mohave County Tiny Home FAQ
Yes. Navajo County follows the IRC. Tiny homes must be at least 200 square feet with a minimum ceiling height of 6’4″. The home must pass inspections and receive proper permits to obtain a Certificate of Occupancy. Navajo County includes parts of the Navajo Nation and Hopi Reservation (sovereign tribal lands with separate regulations). Contact Planning & Development Services for property-specific specifics.
Yes. Pima County (home to Tucson) allows tiny homes following IRC rules — minimum 200 square feet and maximum 400 square feet of living space. The county publishes a dedicated permitting page for tiny houses. A Certificate of Occupancy is obtained by passing inspections and obtaining a building permit. Pima also has progressive ADU rules that benefit tiny homeowners.
Resources: Pima County Tiny House Permitting
Yes. Pinal County follows the IRC. Tiny homes must have a minimum ceiling height of 6’4″ and at least 200 square feet of living space. Permits and inspections required for a Certificate of Occupancy. Pinal is fast-growing as a Phoenix-Tucson corridor county and includes both metro-adjacent and rural zoning regions.
Resources: Pinal County Tiny Home FAQ
Yes. Santa Cruz County requires tiny homes to be at least 200 square feet with a minimum ceiling height of 6’4″. The county adheres to the IRC, so all tiny homes must pass inspections and have all necessary permits to receive a Certificate of Occupancy. Santa Cruz is Arizona’s smallest county by area and shares a border with Mexico (Nogales region).
Resources: Santa Cruz County Government
Does Santa Cruz County, Arizona, Allow Amish Tiny Cabins?
Yes. Santa Cruz County requires tiny homes to be at least 200 square feet with a minimum ceiling height of 6’4″. The county adheres to the IRC, so all tiny homes must pass inspections and have all necessary permits to receive a Certificate of Occupancy. Santa Cruz is Arizona’s smallest county by area and shares a border with Mexico (Nogales region).
Resources: Santa Cruz County Government
Yes. Yavapai County (home to Prescott, Sedona, and Cottonwood) follows the IRC. Tiny homes must be at least 200 square feet with a minimum ceiling height of 6’4″. Building permits and inspections required to receive a Certificate of Occupancy. The county has a thriving tiny home culture, particularly in the Verde Valley and Sedona regions.
Resources: Yavapai County Development FAQ
Yes. Yuma County allows tiny homes that are a minimum of 200 square feet and at least 6’4″ in ceiling height. A Certificate of Occupancy is obtained by passing all inspections and acquiring a building permit. Yuma is in southwest Arizona and is known for its large seasonal RV/snowbird community, making it especially accommodating to park model placements.
Resources: Yuma County Zoning Ordinance
Municipalities
Bisbee is the seat of Cochise County, which follows IRC Appendix Q (296 sq ft minimum, 6’4″ ceiling minimum). The historic mining town has unique zoning given its terrain. Contact Bisbee city offices for tiny home placement specifics.
Resources: Bisbee Planning & Zoning
Casa Grande is in Pinal County, which follows the IRC (200 sq ft min, 6’4″ ceiling min). Contact the city’s Planning Department for municipal zoning specifics.
Resources: Casa Grande Planning
Yes. Chandler allows tiny homes provided they adhere to the IRC — at least 200 square feet with a minimum ceiling height of 6’4″. The tiny home must pass all inspections and acquire a building permit to secure a Certificate of Occupancy.
Resources: Chandler Planning & Zoning
Flagstaff is the seat of Coconino County, which uses the more generous 600 sq ft tiny home definition. The city has notable high-elevation snow load requirements and an active tiny home community (Tiny House Village Flagstaff). Contact Flagstaff Community Development for city-specific rules.
Resources: Flagstaff Community Development
Yes. Gilbert allows tiny homes adhering to the IRC — minimum 200 square feet and a 6’4″ minimum ceiling height. Building permits and inspections required for a Certificate of Occupancy.
Resources: Gilbert Planning & Development Services
Globe is the seat of Gila County, which allows tiny homes up to 500 sq ft with 6’4″ ceiling minimum. Contact the city’s Community Development Department for municipal specifics.
Resources: Globe Community Development
Kingman is the seat of Mohave County, which has Arizona’s smallest tiny home minimum (170 sq ft). Contact Kingman’s Development Services for city zoning rules.
Resources: Kingman Development Services
Yes. The city of Mesa permits tiny homes complying with the IRC — at least 200 square feet with a minimum ceiling height of 6’4″. Tiny homes must obtain a building permit, undergo inspection, and secure a Certificate of Occupancy.
Resources: Mesa Planning & Zoning Board
Nogales is the seat of Santa Cruz County, which follows IRC standards (200 sq ft min, 6’4″ ceiling min). Border city — contact Nogales city offices for local zoning.
Resources: Nogales Planning
Yes. Phoenix allows tiny homes — the home must be at least 200 square feet with a ceiling height of 6’4″. The home must pass all inspections and obtain a building permit to be eligible for a Certificate of Occupancy. Phoenix has specific ADU and infill housing rules layered on top of the county framework.
Resources: Phoenix Zoning Ordinance
Prescott is the seat of Yavapai County, which follows the IRC (200 sq ft min, 6’4″ ceiling min). The city has its own zoning layered on top — contact Prescott Community Development for specifics.
Resources: Prescott Community Development
Safford is the seat of Graham County, which follows the IRC framework. Contact Safford city offices for municipal zoning specifics.
Resources: Safford Government
Scottsdale is in Maricopa County, which follows the IRC (200–400 sq ft, 6’4″ ceiling min). The city has its own detailed zoning code — contact Scottsdale Planning & Development for property-specific rules.
Resources: Scottsdale Planning & Development
Sedona is in Yavapai and Coconino counties, both of which follow the IRC. Sedona is home to the Tiny Camp eco-community. Contact the city’s Community Development Department for tiny home placement specifics.
Resources: Sedona Community Development
Show Low is in Navajo County, which follows the IRC (200 sq ft min, 6’4″ ceiling min). Contact city offices for municipal zoning rules.
Resources: Show Low Planning
St. Johns is the seat of Apache County. Contact the county and city offices for tiny home placement specifics.
Resources: Apache County Tiny House Requirements
Tempe is in Maricopa County, which follows the IRC (200–400 sq ft, 6’4″ ceiling min). Contact Tempe Community Development for city-specific ADU and tiny home rules.
Resources: Tempe Community Development
Yes. Tucson allows tiny homes adhering to the IRC — at least 200 square feet with a ceiling height of 6’4″ or more. All tiny homes must have a building permit and pass inspections to obtain a Certificate of Occupancy. Tucson has progressive ADU rules and an active tiny home/garden home community culture.
Resources: Tucson Planning & Development Services
Yuma is the seat of Yuma County, which follows the IRC (200 sq ft min, 6’4″ ceiling min). The city has notable RV/park model communities given its snowbird population. Contact Yuma’s Community Development Department for tiny home placement specifics.
Resources: Yuma Community Development
