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
A home with an in-law suite includes a private, self-contained living area for family members, often attached to the main residence. If you want to keep aging parents or adult children close while maintaining everyone's privacy, this is the solution. We help you design these spaces to blend with your current home layout.
Frequently asked in Thousand Oaks
What is the permit cost for an accessory dwelling unit in Thousand Oaks?
How can I find homes with mother-in-law suites in Thousand Oaks?
What is the typical ADU cost in Thousand Oaks?
What is involved in ADU building in Thousand Oaks?
How do I choose an ADU company in Thousand Oaks?
What does accessory dwelling unit mean in Thousand Oaks?
In Thousand Oaks, California, an accessory dwelling unit (ADU) is a secondary housing unit on a single-family lot. It is a complete, independent living space with its own kitchen, bathroom, and sleeping area. ADUs can be attached to the main house, like a converted garage, or be a separate backyard structure. They offer flexible housing solutions for residents of Thousand Oaks.
Where can I find local ADU resources 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: Wildwood, North Ranch, Oak Park, Lynnwood, Rancho Conejo — and every surrounding area.
Areas we serve
Browse by state, then city.
