Cost to build accessory dwelling unit

Looking for cost to build accessory dwelling unit in Glendale, AZ? Call AccessoryDwellingUnit Pros 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 is a custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.

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Determining the cost requires looking at site preparation, foundation work, and the level of interior finishing you choose. Costs change based on whether you opt for a pre-designed layout or custom architecture. You should research these costs when you are ready to evaluate the financial return of your property upgrade. Exact pricing confirmed free on the call.

Frequently asked in Glendale

What are the disadvantages of ADUs in Glendale?

Potential downsides include increased utility bills and the added responsibility of property maintenance. You might also consider the impact on your property taxes over time. It's beneficial to discuss these points thoroughly. The pros can offer practical insights for your Glendale home.

How much does an ADU cost in Arizona?

What are the rules for ADUs in Arizona?

While Arizona has state ADU guidelines, local Glendale ordinances are critical. These typically cover aspects like lot coverage, setbacks, and ensuring the ADU is a subordinate dwelling. Understanding these local requirements is crucial for a successful build. The specialists you'll speak with are knowledgeable about these regulations.

Is an ADU allowed in Glendale?

That specific grant program is for California residents and does not apply to Arizona or Glendale. However, it's always a good idea to inquire about any available local or state incentives. During your free call, ask about potential financing options.

What is the process for building an ADU in Glendale?

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

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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, The Highlands, Cactus Corridor, Downtown Glendale, Westgate — and every surrounding area.