1 bedroom
One-bedroom with front porch
1 bed1 bath
Home · Service areas · Thousand Oaks
ADU design-build · Thousand OaksADUs in Thousand Oaks
Large lots, hillside views and many homeowners associations: in Thousand Oaks, a well-placed ADU adds space without changing the character of the street.
What applies to your lot
Building an ADU in Thousand Oaks
Who approves your ADU
City of Thousand Oaks (Ventura County): ADUs follow Article 45 of the city zoning code, reviewed by the Community Development Department. The state reviewed the ordinance again in June 2026; where local and state rules differ, state ADU law applies.
Protected oaks
Thousand Oaks protects its oak trees. Their position decides where an ADU, its trench and its foundation can go: we map them before any design.
Fire and hillside zones
Many neighborhoods are in fire hazard zones, which means ember-resistant vents, Class A roofing and defensible space around the unit.
HOAs
An HOA cannot ban an ADU, but it can set reasonable rules on its appearance. We read your CC&Rs and design around them.
California law, everywhere
The rules every city must respect
800 sq ft
Every city must allow at least an 800 sq ft detached ADU with 4 ft setbacks.
4 ft
Maximum side and rear setback for a new detached ADU.
750 sq ft
No impact fees up to this size.
60 days
To approve or deny a complete application, without a hearing.
Ideas for your lot
Plans that suit Thousand Oaks lots
L & U shapes
U-shape around a courtyard
1 + den1 bath
2 bedrooms
L-shaped family two-bedroom
2 beds2 baths
FAQ
ADU questions in Thousand Oaks
Who approves an ADU in Thousand Oaks?
The City of Thousand Oaks, not Los Angeles. A complete application must be approved or denied within 60 days, without a public hearing.
Can my HOA say no?
Not to the ADU itself. State law limits HOAs to reasonable rules, such as materials or colors.
Do you work in Ventura County?
Yes. Thousand Oaks is part of our service area, and the free visit works the same way.
Nearby areasSimi ValleySan Fernando Valley
Free feasibility call
Book a free 15-minute feasibility call
A project lead reviews your address, tells you what your lot can hold and gives you a first look at your financing eligibility.
What you get
- Free, with no obligation
- A clear answer on what your lot can hold
- A first look at financing eligibility, by phone or at your property
- A site visit only if it makes sense
Prefer to talk now? (424) 448-4895
Email: [email protected]
Los Angeles, CA · We come to your property
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We’ll confirm by text or phone. No obligation.
Service areas
Serving homeowners across Los Angeles
Los Angeles, the South Bay and Orange County, within about 40 miles of Paramount. Farther on request.
Service areas
ADU rules, city by city
Permits, fire and coastal zones, pre-approved plans: see what applies in the 36 cities we serve.
Central Los AngelesSan Fernando ValleyThousand OaksSimi ValleyParamountWest AdamsMid-CityCulver CityLong BeachDowneyWhittierNorwalkTorranceInglewoodComptonCarsonAnaheimSanta AnaIrvineHuntington BeachPasadenaGlendaleBurbankRialto (on request)Garden GroveOrangeFullertonCosta MesaNewport BeachTustinSherman OaksEncinoVan NuysWoodland HillsNorthridgeCalabasas