Can I Build Tiny Home in Phoenix, AZ? (2026)
Find out if you can build a tiny home in Phoenix, AZ. Rules, permit requirements, costs, and next steps.
Tiny homes on permanent foundations are allowed in Phoenix, AZ. Tiny homes on wheels are not permitted as permanent dwellings.
A tiny home is a small dwelling unit — typically under 400 sq ft — that can be built on a permanent foundation or on wheels. In Phoenix, AZ, the rules differ significantly depending on whether the structure is on a permanent foundation (treated as a dwelling unit under building code) or on wheels (treated as a recreational vehicle under vehicle code). Tiny homes on permanent foundations must meet a minimum size of 150 sq ft in Phoenix.
Tiny Home Rules in Phoenix
Tiny Home Rules in Phoenix: Foundation-based tiny homes: Permitted. Tiny homes on wheels (THOWs): Not permitted as permanent dwelling — classified as recreational vehicle. Minimum size: 150 sq ft. Tiny homes on permanent foundations (meeting IBC/IRC minimum standards) are allowed in Phoenix subject to zoning, lot coverage, and setback requirements. Minimum habitable room size per Arizona Residential Code. Tiny homes on wheels (THOWs) are not permitted as permanent residences — classified as recreational vehicles. Phoenix's extreme heat makes THOW permanent occupancy particularly challenging.
Costs & Fees
Building permit fees for tiny homes in Phoenix follow the same schedule as other new construction. Contact the Phoenix Planning and Development Department (PDD) at (602) 262-7811 for current fee information.
Next Steps
Next steps for building a tiny home in Phoenix: 1. Determine foundation vs. wheeled — the rules are fundamentally different. 2. For foundation tiny homes, obtain a building permit from the Phoenix Planning and Development Department (PDD). 3. For wheeled tiny homes, verify whether your property allows RV siting. 4. Check if your tiny home could qualify as an ADU on your property.
Phoenix Planning and Development Department (PDD)
Phone: (602) 262-7811
Website: https://www.phoenix.gov/pdd
Online Permits: https://www.phoenix.gov/pdd/permits
Frequently Asked Questions
Can I build an ADU on my Phoenix property?
Yes. Arizona HB 2297 (effective September 2024) requires Phoenix to allow ADUs on single-family lots and removed the previous owner-occupancy requirement. Phoenix updated its local ordinance to comply. ADUs can be up to 50% of your primary dwelling floor area or 1,200 sqft (whichever is less). No additional parking is required. Side and rear setbacks cannot exceed 5 feet per state law.
What are the short-term rental rules in Phoenix?
Phoenix requires STR registration ($250/year). Arizona SB 1350 (2016) originally preempted cities from banning STRs outright, but SB 1168 (2022) gave cities back some regulatory authority including the ability to require registration, impose safety requirements, and penalize nuisance properties. Maximum occupancy is 2 guests per bedroom plus 2 additional guests. A local contact person must be designated.
Does Phoenix have a solar mandate?
No, Phoenix does not have a solar mandate for new construction. However, Arizona's strong HOA solar protection law (ARS 33-1816) means your HOA cannot prohibit solar installations. Phoenix receives approximately 299 sunny days per year, making it one of the best solar markets in the US. Building permits are required for all solar installations.
What zoning district is my Phoenix property in?
You can look up your Phoenix zoning at the Phoenix Planning and Development Department website using the interactive zoning map at phoenix.gov/pdd/zoning. Most established single-family neighborhoods are zoned R1-6, R1-8, or R1-10. RE-24 and RE-43 are large-lot estate zones. R-2 through R-5 are progressively denser multifamily zones.
Are Saguaro cacti protected in Phoenix?
Yes. Saguaro cacti are protected under Arizona law. You cannot remove, destroy, or relocate a Saguaro cactus without first obtaining a permit from the Arizona Game and Fish Department. Violating this law can result in significant fines. If a Saguaro must be removed for construction, it must be relocated by a licensed cactus moving company with a valid permit.
Source: Phoenix Planning and Development Department (PDD) — Building Regulations. Last verified April 5, 2026. View source