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
Financing an ADU involves finding a loan product that works for your specific financial situation. You might use a home equity line of credit, a cash-out refinance, or a specialized construction loan. You need this service if you have the space for a unit but need help covering the upfront costs.
Frequently asked in Berkeley
What are homes with in-law suites like in Berkeley?
How do I find an accessory dwelling unit near me in Berkeley?
Who are the accessory dwelling unit builders in Berkeley?
Accessory dwelling unit builders in Berkeley, California, are local contractors and design-build firms experienced in ADU construction. They handle the physical building process, from foundation to finishes, ensuring compliance with Berkeley's building codes. Choosing a builder with ADU experience is crucial for a smooth project. We can help you find qualified professionals. Call us for assistance.
What services are available for accessory dwelling units in Berkeley?
Can I get an ADU quote in Berkeley?
What does accessory dwelling unit mean in Berkeley?
In Berkeley, California, an accessory dwelling unit (ADU) refers to a secondary housing unit on a single-family lot. This can be a detached structure, like a backyard cottage, or an attached unit within the existing home. ADUs are intended to provide independent living quarters. Berkeley has specific regulations governing their size and placement. We can help you understand these rules.
What makes an ADU the 'best' for my Berkeley property?
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
Browse by state, then city.
