Accessory dwelling unit permit cost — 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.
Frequently asked in Berkeley
What are the rules for backyard ADUs in Berkeley?
What is involved in ADU building in Berkeley?
Are ADUs allowed in Massachusetts?
This service is for Berkeley, California. While ADUs are increasingly permitted in Massachusetts, regulations can vary significantly by town. Generally, many Massachusetts communities are adopting or have adopted accessory dwelling unit ordinances to allow for their construction. For specific details in Massachusetts, you would need to research the local municipal codes. We focus on Berkeley's regulations.
What is a modular ADU and how does it work in Berkeley?
What is an accessory dwelling unit (ADU)?
An accessory dwelling unit (ADU) is a secondary, independent living unit located on a single-family residential lot. It typically includes its own kitchen, bathroom, and sleeping area. ADUs can be attached to the primary home or be a detached structure, such as a backyard cottage or a converted garage. They are designed to provide additional housing options within existing neighborhoods. We can help you explore ADU options in Berkeley.
What are ADU rental regulations in Berkeley?
ADU rental regulations in Berkeley are governed by city ordinances and state law. These typically address issues like tenant rights, lease agreements, and potentially rent control policies if applicable. It's crucial to understand these regulations to ensure compliance when renting out your ADU. Consulting with a local expert or property management specialist is advisable. We can help you find resources.
What services do ADU companies offer 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, Oceanview — and every surrounding area.
Areas we serve
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