Cost to build accessory dwelling unit

Looking for cost to build 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

When estimating the cost to build, consider the difference between a prefab unit and custom construction, as well as site preparation requirements like clearing trees or grading land. Labor and material prices also play a significant role. We provide an exact pricing confirmed free on the call.

Frequently asked in Glendale

What are the disadvantages of ADUs?

Potential disadvantages of ADUs include the upfront construction costs and the need to comply with Glendale's specific zoning and building regulations. You may also consider the impact on your existing yard space and privacy. However, the benefits of added living space and potential income often make them worthwhile investments for Glendale homeowners.

How much does an ADU cost in Arizona?

What are the rules for ADUs in Arizona?

Arizona has state guidelines, but Glendale also has its own local ordinances that govern ADU construction. These typically cover aspects like lot coverage, setbacks from property lines, and parking requirements. Ensuring your ADU plan complies with all Glendale city codes is essential for a smooth build.

Is an ADU allowed in Glendale?

Yes, ADUs are generally permitted in Glendale, provided they meet the city's specific zoning and building requirements. These regulations often dictate the size, placement, and access for the accessory dwelling unit. Working with local experts ensures your project aligns with all Glendale city codes.

What factors affect ADU pricing in Glendale?

Can I get advice on ADU options?

You can get personalized advice on ADU options for your Glendale property by making a quick call. Discuss your goals for the unit, such as housing family or creating a rental. The specialists can offer insights into design possibilities and the overall process tailored to your specific needs.

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: Downtown Glendale, Arrowhead Lakes, Cactus Corridor, Lake Pleasant, University West — and every surrounding area.