Adu quote — 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 quote is a detailed breakdown of what it takes to bring your secondary unit project to life. This process involves looking at your site conditions, utility access, and design preferences to give you a clear financial picture. You should request this when you are ready to move from the brainstorming phase into real planning. Costs are typically influenced by foundation type and finish levels. Exact pricing confirmed free on the call.
Frequently asked in Berkeley
What are the rules for accessory dwelling units in Massachusetts that apply to Berkeley?
Accessory dwelling unit rules from Massachusetts do not directly apply to Berkeley, California. Each state and city has its own specific regulations. Berkeley has its own zoning ordinances and building codes that govern ADUs. It's crucial to work with local experts who are familiar with California and Berkeley's requirements. They will ensure your ADU is compliant.
What is a modular accessory dwelling unit?
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. It's a self-contained living space with its own entrance, kitchen, and bathroom. ADUs can be attached to the main dwelling or be a separate structure. Local regulations dictate size, placement, and other requirements.
What are the rules for accessory dwelling unit rental in Berkeley?
What is an ADU in Berkeley?
An ADU in Berkeley is an Accessory Dwelling Unit. It's a secondary housing unit located on a lot with an existing single-family home. ADUs provide independent living quarters. They can be attached to the main house, like a converted garage, or be a detached structure in the backyard. Berkeley has specific rules for their construction and use.
What is the ADU construction process in Berkeley?
How do I find an ADU builder 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, Claremont, Indian Rock, North Berkeley, South Berkeley — and every surrounding area.
Areas we serve
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