Accessory dwelling unit construction cost — Scottsdale, AZ
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
Building costs vary based on the size of the unit, the quality of finishes, the complexity of the site foundation, and utility connections. You should consider these expenses when budgeting for a long-term property investment or home expansion. Exact pricing confirmed free on the call.
Frequently asked in Scottsdale
What are the general regulations for building an accessory dwelling unit in Scottsdale?
How does one go about getting permits for an ADU in Scottsdale?
What are the typical considerations for a backyard accessory dwelling unit in Scottsdale?
What does the term 'accessory dwelling unit' actually mean in Scottsdale?
What factors influence the cost of building an accessory dwelling unit in Scottsdale?
Who are the professionals involved in constructing an accessory dwelling unit in Scottsdale?
What are the benefits of adding a mother-in-law suite to a Scottsdale home?
Also serving nearby: Phoenix · Glendale · Tempe · Mesa · Peoria
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
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 Scottsdale, McCormick Ranch, Gainey Ranch, Kierland, Silverleaf — and every surrounding area.
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