Looking for cost to build accessory dwelling unit in Gilbert, AZ? Call AccessoryDwellingUnit Solutions for a contact a provider — no obligation. Licensed adu builders serve Gilbert and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.

About this service

When calculating the budget for a secondary unit, consider the costs for architectural design, permits, materials, and labor. Custom designs and high-end interior finishes will push your budget higher, while standardized layouts can keep costs more predictable. Exact pricing confirmed free on the call.

Frequently asked in Gilbert

What are the disadvantages of ADUs?

How much does an ADU cost in Arizona?

What are the rules for ADUs in Arizona?

Is ADU allowed in Arizona?

Yes, ADUs are generally allowed in Arizona, with many cities actively encouraging their development to address housing needs. Gilbert permits ADUs under specific zoning guidelines. Discussing your plans with a local expert ensures you meet all requirements for your property.

Funding options for ADUs in Gilbert are typically through local programs or private financing. We can help you find pros who understand potential local incentives.

What are the rules for ADU in California?

California has statewide ADU laws designed to streamline approvals, but local jurisdictions still have some oversight. These rules often cover minimum unit sizes, permitting processes, and utility connections. While not directly applicable to Gilbert, understanding these broader trends can be informative.

Also serving nearby: Chandler · Mesa · Tempe · Phoenix · Scottsdale

All cities in Arizona →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

275,411residents

4,011per sq mile

7ZIP codes served

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, Finley Farms, Windham, Gilbert Commons, Windsor Park — and every surrounding area.