Cost of Accessory Dwelling Unit in Tempe, AZ | AccessoryDwellingUnit Direct

Looking for cost of accessory dwelling unit in Tempe, AZ? Call AccessoryDwellingUnit Direct 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 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

Building an ADU involves several variables that shift your final total, such as the size of the unit, whether you choose a detached structure or a garage conversion, and the complexity of your site’s plumbing and electrical needs. We help you navigate these choices to keep your project on track. Exact pricing confirmed free on the call.

Frequently asked in Tempe

What are the disadvantages of ADUs in Tempe?

Some potential disadvantages include the initial construction expenses, the impact on your backyard space, and navigating Tempe's specific zoning and building codes. You'll also want to consider any potential impact on your property taxes. The pros can help you assess these.

How much does an ADU cost in Tempe?

What are the rules for ADUs in Arizona?

Arizona state law encourages ADU development by setting certain standards, but cities like Tempe have their own local zoning ordinances. These typically address setbacks, lot coverage, height limits, and parking. It's vital to consult Tempe's specific regulations.

Is an ADU allowed in Tempe?

Yes, ADUs are permitted in Tempe, and the city has established ordinances that guide their construction. These rules are designed to help integrate ADUs effectively into the existing neighborhoods. The local pros are very familiar with these requirements.

It's always a good idea to ask the pros about any current local or state incentive programs that might be available for ADU projects in Tempe.

What are the rules for ADU in California?

California's ADU rules are largely defined by state legislation that influences local ordinances, aiming to streamline the process. This includes mandates on how cities can regulate ADU development. This framework differs from Arizona's approach.

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: University District, South Tempe, Waterfront, Downtown Tempe, Papago Park — and every surrounding area.