Accessory dwelling unit — Gilbert, AZ
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.
Frequently asked in Gilbert
What's involved in ADU construction in Gilbert?
What are backyard accessory dwelling units like?
Can I get an ADU estimate in Gilbert?
What are the best ADUs for the Arizona heat?
Where can I find an ADU builder near me?
What's the process for an ADU building project?
What is an accessory dwelling unit permit?
Also serving nearby: Chandler · Mesa · Tempe · Phoenix · Scottsdale
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Gilbert — population 275,411; about 4,011 residents per square mile across 68.7 sq mi. ZIP codes covered include 85233, 85234, 85295, 85296, 85297, 85298, 85299.
Neighborhoods served in Gilbert: Power Ranch, Windom Ranch, Morrison Ranch, Gilbert Commons, Agritopia — and every surrounding area.
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