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.
Frequently asked in Glendale
What are the disadvantages of ADUs?
How much does an ADU cost in Arizona?
The cost of an ADU in Arizona varies widely based on its size, the quality of materials chosen, and the complexity of the build. Factors like site preparation and interior finishes play a significant role in the final price. Getting a personalized quote for your specific Glendale property is the best way to estimate costs.
What are the rules for ADUs in Arizona?
Is an ADU allowed in Glendale?
Yes, accessory dwelling units are generally permitted in Glendale, provided they meet specific city criteria. These often relate to lot size, the presence of a primary dwelling, and utility connections. We can help you verify your property's eligibility.
What are the rules for ADUs in California?
California has state laws that streamline ADU approvals, often allowing them by right if they meet size and setback standards. Local jurisdictions still have input, but state law establishes a baseline. This differs from how Arizona cities like Glendale may regulate ADUs.
California has offered grants to help subsidize ADU construction costs, especially for affordable housing initiatives. These grants can significantly reduce the initial financial burden. This program is specific to California and not available in Arizona.
Also serving nearby: Phoenix · Surprise · Avondale · Tempe · Peoria
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
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, Cimarron, Downtown Glendale, Palm Glen, Westgate — and every surrounding area.
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