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Accessory dwelling unit services — Phoenix, AZ

Looking for accessory dwelling unit services in Phoenix, AZ? Call AccessoryDwellingUnit Direct for a contact a provider — no obligation. Licensed adu builders serve Phoenix and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.

About this service

Frequently asked in Phoenix

What are the disadvantages of ADUs in Phoenix?

Potential disadvantages for ADUs in Phoenix might include ensuring adequate water conservation and managing heat island effects in your yard. Parking requirements can also be a consideration, depending on the specific zoning. You'll want to think about how the ADU integrates with your existing landscape. We can help you with this.

How much does an ADU cost in Phoenix?
What are the rules for ADUs in Phoenix?

Phoenix has streamlined its ADU regulations, generally allowing them in single-family zones with specific guidelines on size, setbacks, and parking. The goal is to encourage responsible development. Understanding these local ordinances is key to a smooth process. We can help you with the details.

Can I build an ADU above my garage in Phoenix?

Yes, building an ADU above your garage is a very common and often cost-effective option in Phoenix. This approach can minimize the impact on your yard space. You'll need to ensure the garage structure is sound and meets all current building codes. We can help assess feasibility.

What permits are required for an ADU in Phoenix?
Are there restrictions on the size of ADUs in Phoenix?

Phoenix has guidelines for ADU size, typically related to the size of the primary dwelling and lot coverage. The intent is for ADUs to be secondary living spaces. Specific size limitations can vary, so it's best to get tailored information. A quick call can clarify this for your property.

Also serving nearby: Glendale · Scottsdale · Tempe · Peoria · Surprise

All cities in Arizona →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

1,650,070residents
3,183per sq mile
8ZIP codes served

Serving all of Phoenix — population 1,650,070; about 3,183 residents per square mile across 518.3 sq mi. ZIP codes covered include 85001, 85002, 85003, 85004, 85005, 85006, 85007, 85008.

Neighborhoods served in Phoenix: Arcadia, Biltmore, Ahwatukee, North Mountain, Downtown Phoenix — and every surrounding area.

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