Adu Services in Phoenix, AZ | AccessoryDwellingUnit Experts

Looking for adu services in Phoenix, AZ? Call AccessoryDwellingUnit Experts 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 is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.

About this service

ADU services are the professional steps required to transform your backyard or garage into a functional living space. This process involves design consultations, structural engineering, and utility connections. You should look into these services if you are ready to increase your property value or need extra living space for relatives. We focus on making sure your project meets all safety codes and neighborhood regulations while fitting the specific design style of your main home.

Frequently asked in Phoenix

What are the disadvantages of ADUs in Phoenix?

How much does an ADU cost in Phoenix?

What are the rules for ADUs in Phoenix?

Phoenix has specific zoning regulations for ADUs, including requirements for lot coverage, setbacks, and owner occupancy. It's crucial to work with professionals who are up-to-date on these rules to ensure compliance. They will guide you through the process.

Is an ADU allowed in Phoenix?

This particular grant is not applicable to projects in Phoenix. We can help you explore any potential local incentives or financing options available in Arizona.

What are the rules for ADU in California?

California has state laws that simplify ADU development by setting statewide standards for size, setbacks, and permitting. These laws are intended to increase housing options. Local governments must adhere to these standards, though some local nuances may still apply.

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, Camelback East, Ahwatukee, Downtown Phoenix — and every surrounding area.