Accessory dwelling unit permit cost — 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 accessory dwelling unit companies are in Gilbert?
What is the accessory dwelling unit construction cost in Gilbert?
Can I build an accessory dwelling unit rental in Gilbert?
Are there ADU grants available in Gilbert?
What is an ADU unit for my Gilbert home?
Can I get a prefab ADU in Gilbert?
How do I get an ADU quote in Gilbert?
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, Agritopia, The Islands, Stone Creek Ranch, Gilbert Heights — and every surrounding area.
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