Adu company — 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 company manages the entire project lifecycle, from initial design and permit acquisition to the final walk-through. You need a full-service company if you want to avoid the stress of coordinating different contractors or handling complex municipal filings yourself. We act as your single point of contact, ensuring your vision is executed correctly while keeping you informed at every stage of construction. Exact pricing confirmed free on the call.
Frequently asked in Berkeley
What types of detached accessory dwelling units can be built in Berkeley?
What is involved in building an accessory dwelling unit in Berkeley?
What is the cost of an accessory dwelling unit in Berkeley?
Are there ADU housing options available in Berkeley?
What is an ADU unit in Berkeley?
An ADU unit in Berkeley refers to a secondary housing unit on a single-family residential lot. It can be attached to the main house or be a standalone structure, like a backyard cottage. These units provide additional living space or rental income potential. We help you understand how ADUs are defined and regulated in Berkeley.
Are there affordable accessory dwelling unit options in Berkeley?
Affordability for an accessory dwelling unit in Berkeley can be influenced by size and design simplicity. Opting for standard materials and efficient layouts can help reduce costs. Prefabricated ADUs might also offer savings. We can discuss these cost-saving factors during your consultation. Our goal is to provide clarity on what impacts the price.
What does 'local ADU' mean 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, Indian Rock, Elmwood, West Berkeley, Rockridge — and every surrounding area.
Areas we serve
Browse by state, then city.