Adu builder — 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
An ADU builder is a professional who manages the design, permitting, and construction of your secondary unit. You need to hire one when you want a streamlined process that handles the heavy lifting from start to finish. Builders provide expertise on zoning and structural requirements that keep your project on budget. Exact pricing confirmed free on the call.
Frequently asked in Berkeley
What does an accessory dwelling unit contractor do in Berkeley?
An accessory dwelling unit contractor in Berkeley manages the entire ADU project. This includes initial design consultations, assessing your property's suitability, and securing necessary permits from the city. They then oversee all construction phases, from site preparation to finishing touches. The contractor ensures the ADU is built to code and meets your specific needs and preferences.
What are the options for a backyard accessory dwelling unit in Berkeley?
What are accessory dwelling unit homes in Berkeley?
What is the best ADU to build in Berkeley?
Where can I find an accessory dwelling unit near me in Berkeley?
What is ADU building in Berkeley?
What is a prefabricated accessory dwelling unit 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: Gourmet Ghetto, Lorraine Village, University District, West Berkeley, Claremont Hills — and every surrounding area.
Areas we serve
Browse by state, then city.