Cost to build 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.
About this service
When estimating the cost to build, consider the difference between a prefab unit and custom construction, as well as site preparation requirements like clearing trees or grading land. Labor and material prices also play a significant role. We provide an exact pricing confirmed free on the call.
Frequently asked in Gilbert
What are the benefits of a modular accessory dwelling unit in Gilbert?
What accessory dwelling unit companies operate in Gilbert?
How do I find local ADU services in Gilbert?
What does 'adu unit' mean in Gilbert?
Are there affordable accessory dwelling unit options in Gilbert?
What are the requirements for accessory dwelling units ADUs in Gilbert?
What accessory dwelling unit services are available 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, Windfield, Higley Park, Stonegate, The Islands, Downtown Gilbert — and every surrounding area.
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