Accessory dwelling unit contractor

Looking for accessory dwelling unit contractor in Tempe, AZ? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve Tempe 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 several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

About this service

A contractor oversees the physical build, managing the subcontractors, materials, and daily construction progress. They are responsible for making sure the structure is built according to the approved plans and local safety standards. You need a contractor when you have your designs finalized and are ready for the actual building phase to begin. They act as the primary point of contact for all site activity.

Frequently asked in Tempe

What are the disadvantages of ADUs?

How much does an ADU cost in Massachusetts?

This question relates to Massachusetts, not Arizona. The cost of an ADU in Tempe, Arizona, will vary based on its size, the chosen materials, and site-specific needs. To get an accurate figure, you’ll need a personalized quote. Contacting a local contractor is the best approach.

What are the rules for ADUs in California?

This pertains to California regulations. For Tempe, Arizona, you must consult the city’s specific ADU ordinances. These typically cover requirements for setbacks, maximum unit size, and whether the ADU can be attached or detached from the main home. Understanding your local rules is essential.

Is ADU allowed in Maryland?

This information is for Tempe, Arizona. To determine if ADUs are permitted in Maryland, you'll need to research the zoning laws and building codes of the specific Maryland city or county you are interested in. Regulations can differ significantly from state to state and even within counties.

This grant is specific to California and not available in Arizona. It's crucial to research current grant programs offered at the state and local levels for ADUs in your area. Funding opportunities can change, so staying updated is beneficial.

What are the rules for ADU in California?

This refers to California's ADU laws. In Tempe, Arizona, you'll need to review the city's specific ADU ordinances. These often detail requirements for things like minimum lot size, maximum height, and parking provisions. Familiarizing yourself with these local rules is key.

Also serving nearby: Chandler · Gilbert · Mesa · Phoenix · Glendale

All cities in Arizona →

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

Service area details

189,834residents

4,748per sq mile

8ZIP codes served

Serving all of Tempe — population 189,834; about 4,748 residents per square mile across 40.0 sq mi. ZIP codes covered include 85280, 85281, 85282, 85283, 85284, 85285, 85287, 85288.

Neighborhoods served in Tempe: Tempe Town Lake, South Tempe, University District, Papago Park, Rural Road Corridor — and every surrounding area.