Homes with mother in law suites — 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
Adding a mother-in-law suite is a popular way to provide comfortable, accessible housing for family members on your own property. These suites usually include a kitchenette and private bathroom. You need this if you want to provide independent living for loved ones while keeping them close by.
Frequently asked in Berkeley
What is a 'prefab ADU' in Berkeley?
What does ADU building involve in Berkeley?
Where can I find an accessory dwelling unit near me in Berkeley?
What ADU company should I choose in Berkeley?
What is ADU financing in Berkeley?
What does accessory dwelling unit mean?
An accessory dwelling unit (ADU) means a secondary, independent living unit on an existing single-family lot. It's a complete dwelling with its own kitchen, bathroom, and sleeping area, separate from the main house. ADUs offer flexibility for extended family, renters, or as home offices. They are designed to be smaller and are often referred to as in-law suites or backyard cottages.
What are accessory dwelling unit companies 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, South Berkeley, North Berkeley, Oceanview — and every surrounding area.
Areas we serve
Browse by state, then city.