ADU Locator

1 Best ADU Builders in Los Angeles, Arizona

Verified ADU contractors and builders in Los Angeles, AZ

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JDB Builders Inc.

We are a full-service residential construction company committed to raising the standard in the building industry. Our mission is simple: help every client create a space that supports their lifestyle, protects their investment, and serves their family for years to come.

(855) 782-8453
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Frequently Asked Questions — ADU Builders in Los Angeles

How much does it cost to hire an ADU builder in Los Angeles?

ADU construction costs in Los Angeles, Arizona vary widely depending on size, type, and site conditions. Detached ADUs typically range from $150,000–$400,000+, while garage conversions and attached ADUs can be more affordable. Contact multiple builders in Los Angeles to get accurate quotes for your specific project.

How long does it take to build an ADU in Los Angeles?

In Los Angeles, the ADU construction timeline typically ranges from 6 to 18 months from permit application to move-in. Permitting alone can take 2–6 months depending on Arizona local regulations. Prefab and modular ADUs often have faster timelines than site-built units.

Do I need a permit to build an ADU in Los Angeles?

Yes, a building permit is required for ADU construction in Los Angeles, Arizona. Your ADU builder will typically handle the permit application as part of their service. Arizona has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.

What types of ADUs can be built in Los Angeles?

Common ADU types in Los Angeles include detached ADUs (backyard cottages), attached ADUs, garage conversions, basement conversions, and prefab/modular ADUs. The best type for your property depends on lot size, zoning, and budget. A local Los Angeles ADU builder can advise on what's allowed on your specific parcel.