Adu building — Long Beach, CA
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
Frequently asked in Long Beach
What are the benefits of adding an affordable ADU in Long Beach?
How do I get an ADU permit in Long Beach?
What is the cost to build an ADU in Long Beach?
Can I build a detached ADU in Long Beach?
Are there financing options for ADUs in Long Beach?
What are the best accessory dwelling unit companies in Long Beach?
Can I rent out my ADU in Long Beach?
Also serving nearby: Carson · Compton · Westminster · Norwalk · Huntington Beach
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Long Beach — population 449,468; about 8,870 residents per square mile across 50.7 sq mi. ZIP codes covered include 90801, 90802, 90803, 90804, 90805, 90806, 90807, 90808.
Neighborhoods served in Long Beach: Belmont Shore, Downtown Long Beach, Alamitos Beach, Naples, Bixby Knolls — and every surrounding area.
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