Cost of accessory dwelling unit — Berkeley, CA
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.
About this service
Building an ADU involves several variables that influence the total investment, including your local site conditions, utility hookups, and the finishes you select for the interior. We focus on transparency throughout your project planning to keep you on budget. Exact pricing confirmed free on the call.
Frequently asked in Berkeley
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What are accessory dwelling units (ADUs) in Berkeley?
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What are accessory dwelling units (ADUs) in Berkeley?
Also serving nearby: Richmond · Oakland · Daly City · Vallejo · Concord
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Berkeley — population 118,962; about 11,403 residents per square mile across 10.4 sq mi. ZIP codes covered include 94701, 94702, 94703, 94704, 94705, 94707, 94708, 94709.
Neighborhoods served in Berkeley: Richmond, Oakland, Daly City, Albany, Emeryville — and every surrounding area.
Areas we serve
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