Accessory dwelling unit — 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
An ADU is a self-contained living space that includes a kitchen, bathroom, and sleeping area, situated on the same lot as your primary home. You need one if you require more space but want to avoid moving. Costs fluctuate based on material choices, utility upgrades, and square footage. Exact pricing confirmed free on the call.
Frequently asked in Thousand Oaks
What is the permit cost for an accessory dwelling unit in Thousand Oaks?
How much does an accessory dwelling unit cost in Thousand Oaks, California?
The accessory dwelling unit cost in Thousand Oaks, California, is influenced by size, design, and material choices. Factors like foundation type and utility connections also impact the final price. You'll get a detailed quote after a professional assessment of your property. This quote will outline all project expenses. It's the best way to understand your investment in Thousand Oaks.
Where can I find the best accessory dwelling unit options in Thousand Oaks?
Are there specific accessory dwelling unit companies serving Thousand Oaks?
What is the cost for an ADU in Thousand Oaks?
Where can I find an ADU near me in Thousand Oaks?
Who is the best ADU company 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, Dos Vientos — and every surrounding area.
Areas we serve
Browse by state, then city.