Cost of accessory dwelling unit

Looking for cost of accessory dwelling unit in Glendale, AZ? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve Glendale 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 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

Building an ADU involves several variables that shift the total investment. Your site conditions, the type of foundation, and the quality of finishes you choose will dictate whether you land on the lower or higher end of the spectrum. Because every lot is unique, we provide a breakdown of your specific project requirements to ensure full transparency. Exact pricing confirmed free on the call.

Frequently asked in Glendale

What are the disadvantages of ADUs in Glendale?

Potential disadvantages include the initial cost of construction and the time it takes to get permits approved by the city. Glendale's zoning ordinances will have specific requirements for lot size, setbacks, and parking that need careful attention. It's also important to consider how an ADU might affect your existing utilities and any homeowner association rules. We can help you find pros who know these regulations.

How much does an ADU cost in Arizona?

The cost of an ADU in Arizona, including Glendale, varies significantly based on size, design complexity, and the materials you select. A simple garage conversion will generally be less expensive than building a new, detached unit from scratch. Factors like foundation work, plumbing, and electrical hookups are major cost drivers. Getting a precise quote is the best way to know.

What are the rules for ADUs in Arizona?

Is an ADU allowed in Glendale?

Yes, ADUs are permitted in Glendale, provided they meet the city's zoning and building code requirements. The city has been working to facilitate the development of ADUs as a housing solution. You'll need to ensure your ADU plans comply with local regulations regarding size, parking, and integration with the primary dwelling. We can help you find local experts.

How can I get advice on an ADU project in Glendale?

To get the most relevant advice for your Glendale ADU project, speak directly with local ADU specialists. They can assess your property, discuss your specific needs, and explain how Glendale's regulations apply. This personalized guidance is invaluable for understanding design options and project feasibility. It's the ideal starting point.

What affects ADU costs in Glendale?

Also serving nearby: Phoenix · Surprise · Avondale · Tempe · Peoria

All cities in Arizona →

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

Service area details

253,855residents

3,781per sq mile

8ZIP codes served

Serving all of Glendale — population 253,855; about 3,781 residents per square mile across 67.1 sq mi. ZIP codes covered include 85301, 85302, 85303, 85304, 85305, 85306, 85307, 85308.

Neighborhoods served in Glendale: Arrowhead Lakes, Ceramics, Glendale Lakes, The Meadows, Cimarron — and every surrounding area.