Looking for cost to build accessory dwelling unit in Gilbert, AZ? Call AccessoryDwellingUnit Experts 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 is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.

About this service

Building an ADU involves costs for permits, site prep, foundation, framing, plumbing, and electrical work. Prices fluctuate based on whether you choose a custom design or a pre-planned layout, as well as the complexity of connecting to existing city utilities. Exact pricing confirmed free on the call.

Frequently asked in Gilbert

What are the disadvantages of ADUs in Arizona?

In Arizona, some disadvantages can include the initial construction cost and potential impacts on your existing utility services. You'll also need to consider how an ADU might affect your property taxes. It's important to weigh these factors against the benefits of increased living space or rental income. We can discuss these trade-offs with you.

How much does an ADU cost in Gilbert?

What are the rules for ADUs in Gilbert?

Gilbert has specific regulations regarding ADUs, including lot coverage, setbacks, and parking requirements. These rules ensure that new units integrate well with the surrounding neighborhood. Understanding these local ordinances is crucial before you start planning. We can help clarify these rules for your specific situation.

Is an ADU allowed in Gilbert?

What's involved in the ADU building process in Gilbert?

Can I put an ADU above my garage in Gilbert?

Building an ADU above an existing garage in Gilbert is often a viable option. This type of ADU can be cost-effective as it utilizes existing structure. You'll still need to ensure it meets all local building codes and zoning regulations. We can help you assess the feasibility and get a quote.

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, Windham, Morrison Ranch, Gilbert Commons, Finley Farms — and every surrounding area.