Cost to build accessory dwelling unit

Looking for cost to build accessory dwelling unit in Glendale, AZ? Call AccessoryDwellingUnit Direct 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 variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.

About this service

The expense of building an ADU varies based on site preparation, whether you need to run new sewer or electrical lines, and the level of interior customization you choose. Larger custom builds naturally require more materials and labor than simpler conversions. We provide exact pricing confirmed free on the call.

Frequently asked in Glendale

What are the disadvantages of ADUs in Glendale?

Potential disadvantages could include ensuring sufficient utility capacity and complying with specific zoning requirements regarding lot coverage and setbacks. You'll also need to consider the permitting process. Local pros are familiar with these unique aspects of Glendale development.

How much does an ADU cost in Arizona?

The cost to build an ADU in Arizona, including Glendale, depends on its size, design, and the quality of materials used. Site preparation and any necessary utility upgrades are also significant cost factors. A free, customized quote will provide an accurate estimate for your specific project.

What are the rules for ADUs in Glendale?

Is ADU allowed in Arizona?

What are the rules for ADU in Arizona?

Arizona's ADU rules are primarily set at the city level, meaning Glendale has its own set of guidelines. These often address parking requirements, minimum square footage, and exterior design standards. Discussing your plans with a local expert ensures you meet all necessary criteria.

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, Cactus Corridor, Downtown Glendale, Kierland, Palm Glen — and every surrounding area.