Affordable accessory dwelling unit — Phoenix, AZ

Looking for affordable accessory dwelling unit in Phoenix, AZ? Call AccessoryDwellingUnit Pros 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 custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.

About this service

Affordability in backyard homes often comes down to choosing efficient designs and standardized floor plans. By selecting a model that fits your existing utility footprint and requires minimal site excavation, you can keep your budget manageable. Exact pricing confirmed free on the call.

Frequently asked in Phoenix

What are the disadvantages of ADUs in Phoenix?

Potential disadvantages in Phoenix can include the initial costs of construction and the time it takes to obtain necessary permits. You'll also need to ensure your property meets specific zoning requirements, including lot coverage and setbacks. Careful planning helps overcome these.

How much does an ADU cost in Phoenix?

The cost of an ADU in Phoenix varies greatly depending on its size, design, the materials used, and the specific site conditions. Factors like foundation work, utility hookups, and interior finishes will influence the final price. A personalized quote is the best way to determine your specific cost.

What are the rules for ADUs in Phoenix?

Phoenix has specific zoning ordinances for ADUs, generally allowing them in most residential zones. Key regulations often include minimum lot sizes, setback requirements, and limits on the number of ADUs per lot. Working with local pros ensures compliance.

Is an ADU allowed in Glendale, Arizona?

Glendale, Arizona, has its own set of zoning ordinances and building codes that are separate from Phoenix. If you're considering an ADU in Glendale, you'll need to consult their specific local regulations to ensure your project complies with their requirements.

What's involved in building an ADU in Scottsdale?

Are ADUs permitted in Tempe?

Yes, Tempe generally permits ADUs, but you must comply with their specific local zoning ordinances. These rules typically cover lot size, setbacks, and integration with the existing property. Consulting with local experts is recommended for a smooth process in Tempe.

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, Downtown Phoenix, Ahwatukee, Scottsdale, Tempe — and every surrounding area.