Homes with mother in law suites — Thousand Oaks, 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 Thousand Oaks
What are the ADU permit requirements in Thousand Oaks?
What is ADU housing in Thousand Oaks?
ADU housing in Thousand Oaks refers to the construction of a secondary, independent living unit on an existing single-family lot. This can be a detached structure like a backyard cottage or an attached unit, such as a conversion of garage space. These units are designed to provide separate living quarters with their own kitchens and bathrooms. They are a flexible solution for multi-generational living or rental income.
Are there ADU builders available near me in Thousand Oaks?
What is the process for ADU building in Thousand Oaks?
How much does a prefabricated ADU cost in Thousand Oaks?
What makes an ADU affordable in Thousand Oaks?
Can I get an ADU quote in Thousand Oaks?
Also serving nearby: Simi Valley · Oxnard · San Buenaventura Ventura · Santa Monica · Santa Clarita
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Thousand Oaks — population 123,463; about 2,234 residents per square mile across 55.3 sq mi. ZIP codes covered include 91358, 91360, 91362.
Neighborhoods served in Thousand Oaks: Westlake Village, North Ranch, Oak Park, Wildwood, Moorpark — and every surrounding area.
Areas we serve
Browse by state, then city.