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

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

Building an ADU involves several variables that influence the total investment, including your local site conditions, utility hookups, and the finishes you select for the interior. We focus on transparency throughout your project planning to keep you on budget. Exact pricing confirmed free on the call.

Frequently asked in Tempe

What are the disadvantages of ADUs in Tempe?

Potential disadvantages include the initial construction costs and ensuring compliance with Tempe's specific zoning laws and building codes. You'll also want to consider how an ADU might affect your property's yard space or existing utility connections.

How much does an ADU cost in Arizona?

The cost of an ADU in Arizona can vary greatly depending on its size, design complexity, chosen materials, and site conditions. Factors like foundation work and any necessary utility upgrades for your Tempe property will impact the final price. Getting a personalized quote is the best way to understand the specific cost for your project.

What are the rules for ADUs in Arizona?

Is an ADU allowed in Tempe?

Yes, Accessory Dwelling Units are permitted in Tempe, provided they meet the city's established zoning and building regulations. Tempe supports ADUs as a valuable addition to its housing stock. Working with local pros ensures your project adheres to all Tempe requirements from the outset.

How do I find a contractor for an ADU in Tempe?

What are the benefits of adding an ADU in Tempe?

Adding an ADU offers numerous benefits in Tempe, including generating rental income, providing space for family members, and increasing your property's market value. It's a flexible solution for homeowners looking to adapt to changing needs. Discussing your specific goals with a pro can highlight how an ADU can best serve you.

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