Accessory Dwelling Unit Cost in Tempe, AZ | AccessoryDwellingUnit Direct

Looking for accessory dwelling unit cost 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

Total costs are influenced by the complexity of your site, the square footage of the unit, and the specific utility upgrades needed to support a new home. Choosing between a prefab unit and a custom build also changes your bottom line. We provide exact pricing confirmed free on the call.

Frequently asked in Tempe

What are the disadvantages of ADUs in Tempe?

How much does an ADU cost in Arizona?

The cost of an ADU in Arizona varies significantly based on its size, design complexity, materials used, and site preparation needs. Utility connections and permit fees also factor in. For a precise cost estimate in Tempe, a professional assessment of your property is essential.

What are the rules for ADUs in Arizona?

Arizona has state laws that encourage ADU development, and Tempe has adopted ordinances to facilitate them. These typically address lot coverage, setbacks, parking, and design standards. Local pros are up-to-date on these specific Tempe regulations.

Is an ADU allowed in Maryland?

This question concerns Maryland. For Tempe, Arizona, ADUs are generally allowed under specific city ordinances. We can help you connect with local experts who understand the precise rules and requirements for adding an ADU to your Tempe property.

While Arizona and Tempe may have their own incentive programs or financing options, they differ from California's. It's best to ask local professionals about any current opportunities available in your area.

What's involved in building an ADU in Tempe?

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, Downtown Tempe, Papago Park, The Lakes, Warner Ranch — and every surrounding area.