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Accessory dwelling unit permit cost — Tempe, AZ

Looking for accessory dwelling unit permit 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.

Frequently asked in Tempe

What are the disadvantages of ADUs?

Some homeowners consider the upfront construction costs and the time involved in the permitting process as drawbacks. You might also think about how an ADU could impact your existing yard or overall property aesthetics. However, the benefits of increased living space and rental income are substantial. Discussing these with a local pro is helpful.

How much does an ADU cost in Arizona?
What are the rules for ADUs in Arizona?

Arizona has state legislation that promotes ADUs, but Tempe has its own specific local ordinances. These often dictate things like maximum size, lot coverage, and parking requirements. Understanding these local rules is critical. A professional familiar with Tempe's regulations will ensure compliance.

Is an ADU allowed in Tempe?

Yes, Tempe allows ADUs under its zoning ordinances, with specific guidelines in place. The city supports ADUs as a means to increase housing diversity. You must adhere to local requirements regarding size, placement, and design. A licensed expert can ensure your project meets these standards.

However, it's worth checking for any local or state incentives available for ADU construction in the Tempe area. Inquiring about current programs is advisable. A local professional can offer the latest information.

What are the permit costs for an ADU?

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 Area, Papago Park, Tempe Lake — and every surrounding area.

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