Looking for accessory dwelling unit permit cost in Tempe, AZ? Call AccessoryDwellingUnit Pros 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 custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.

About this service

Permit fees are paid to your local municipality and fluctuate based on the specific city or county where your property is located. These costs cover plan reviews, impact fees, and safety inspections required to make your new space legal and compliant. Because every jurisdiction has a different fee structure, the final amount depends on your specific town’s regulations. We help you estimate these during the planning phase. Exact pricing confirmed free on the call.

Frequently asked in Tempe

What are the disadvantages of ADUs in Tempe?

Potential drawbacks include the initial construction investment and the impact on your existing yard space. You should also consider any potential changes to your property taxes. However, the long-term benefits of increased property value and rental income are often compelling in the Tempe market.

How much does an ADU cost in Arizona?

What are the rules for ADUs in Arizona?

Arizona has state legislation that encourages ADUs, and cities like Tempe have their own local ordinances to implement these guidelines. These rules generally cover aspects such as maximum size, minimum lot size, and parking requirements. Experienced professionals will ensure your project complies with all regulations.

Is ADU allowed in Maryland?

This question relates to Maryland regulations, and our expertise is focused on ADUs within Arizona. For specific information on ADU allowances in Maryland, you will need to contact a service provider operating in that state.

What's the accessory dwelling unit permit cost 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: Downtown Tempe, University District, Papago Park, South Tempe — and every surrounding area.