Detached accessory dwelling unit — 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
A detached ADU is a standalone building separate from your main house, often located in the backyard. This is a great choice if you want maximum privacy for yourself or your tenants. Cost factors include foundation requirements, utility trenching, and the exterior siding materials you choose. It is a popular way to expand your usable square footage. Exact pricing confirmed free on the call.
Frequently asked in Scottsdale
What's involved in building an accessory dwelling unit in Scottsdale?
Are there specific requirements for renting out an ADU in Scottsdale?
What makes a detached accessory dwelling unit the 'best' option in Scottsdale?
Can you get a pre-fabricated or modular accessory dwelling unit in Scottsdale?
What should I look for in an accessory dwelling unit contractor in Scottsdale?
What permits are typically needed for an ADU in Scottsdale?
What are the typical accessory dwelling unit services offered in Scottsdale?
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, Scottsdale Quarter — and every surrounding area.
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