Adu Cost in Tempe, AZ | AccessoryDwellingUnit Experts

Looking for adu cost 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

Total ADU costs are driven by the foundation type, the complexity of plumbing and electrical runs, and your choice of fixtures. We provide a clear breakdown of where your money goes so you know exactly what you are paying for from day one. Exact pricing confirmed free on the call.

Frequently asked in Tempe

What are the disadvantages of ADUs in Tempe?

Potential disadvantages in Tempe can include ensuring adequate parking solutions and navigating specific zoning regulations regarding setbacks and lot coverage. Understanding utility capacity is also important. A professional assessment is beneficial.

How much does an ADU cost in Arizona?

The cost of an ADU in Arizona, including Tempe, is influenced by its size, design complexity, and chosen materials. Factors like site preparation, foundation needs, and the type of ADU (e.g., detached vs. attached) will affect the final price. A detailed quote is required.

What are the rules for ADUs in Arizona?

Arizona has statewide ADU laws, and Tempe has its own local zoning ordinances that must be followed. These typically cover aspects like minimum lot size, building height, and accessory dwelling unit permits. Local regulations are paramount.

Is an ADU allowed in Tempe?

Yes, ADUs are permitted in Tempe, adhering to Arizona's ADU legislation and the city's specific zoning rules. You'll need to confirm your property meets all requirements for setbacks and lot coverage. Pros can confirm.

How do I get a quote for 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: The Lakes, University District, Downtown Tempe, Warner Ranch, ASU Research Park — and every surrounding area.