Accessory dwelling unit companies — 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
These companies provide end-to-end management for property owners looking to add a secondary unit. They typically offer a mix of design, permitting, and construction management services to streamline the project. You need to hire a company when you want a structured, professional approach to the entire build process rather than managing individual subcontractors yourself. They help ensure your unit is built to code, on time, and aligned with your budget goals.
Frequently asked in Berkeley
What are the financing options for an accessory dwelling unit in Berkeley?
Financing options for an accessory dwelling unit in Berkeley can include home equity loans, personal loans, and construction loans. Many homeowners also explore refinancing their existing mortgage. It's advisable to speak with financial institutions about options tailored for ADU projects. Licensed builders can also offer insights into common financing methods used in Berkeley.
Are there accessory dwelling unit grants available in Berkeley?
Where can I find an ADU builder in Berkeley?
Can you recommend an accessory dwelling unit contractor in San Diego?
What is an ADU company in Berkeley?
What is the process for obtaining an accessory dwelling unit permit in Berkeley?
What does accessory dwelling unit mean in Berkeley?
In Berkeley, an accessory dwelling unit (ADU) means a secondary housing unit on a single-family residential lot. This can be attached to the main house or a detached structure. ADUs provide additional living space and are subject to specific city regulations. Understanding these rules is crucial for any ADU project 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, West Berkeley, North Berkeley, South Berkeley, Claremont Hills — and every surrounding area.
Areas we serve
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