Cost of accessory dwelling unit

Looking for cost of accessory dwelling unit in Scottsdale, AZ? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve Scottsdale 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 several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

About this service

Building an ADU involves several variables that shift the total investment. Your site conditions, the type of foundation, and the quality of finishes you choose will dictate whether you land on the lower or higher end of the spectrum. Because every lot is unique, we provide a breakdown of your specific project requirements to ensure full transparency. Exact pricing confirmed free on the call.

Frequently asked in Scottsdale

What are the disadvantages of ADUs?

The main disadvantage is the significant initial investment required for a custom Scottsdale build. You also assume the responsibility of maintaining a second structure on your Scottsdale property permanently. Increased density might impact your current parking and privacy levels at home. Consult with a professional to see if these factors fit your long-term property goals.

How much does an ADU cost in Massachusetts?

Costs in Massachusetts do not reflect the current market conditions for a Scottsdale build. Local labor rates and high-quality desert-appropriate materials dictate your final price here. We provide quotes tailored specifically to the Scottsdale construction market. Call us today to get an accurate estimate based on your actual site needs.

What are the rules for ADUs in California?

Is ADU allowed in Maryland?

What are the rules for ADU in California?

Also serving nearby: Phoenix · Glendale · Tempe · Mesa · Peoria

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More on this: HUD ADU resources — ADU policy and financing research.

Service area details

244,394residents

1,328per sq mile

8ZIP codes served

Serving all of Scottsdale — population 244,394; about 1,328 residents per square mile across 184.0 sq mi. ZIP codes covered include 85250, 85251, 85252, 85254, 85255, 85256, 85257, 85258.

Neighborhoods served in Scottsdale: Old Town, McCormick Ranch, Grayhawk, Desert Mountain, Troon North — and every surrounding area.