ADU Builder Westlake Village: Guest Houses, Garage Conversions and JADUs
Set around the shores of Westlake Lake on the Los Angeles–Ventura County line, Westlake Village properties offer generous lots ideal for a custom detached ADU or guest house. We design and build seamless backyard homes that complement your main residence, with City of Westlake Village permitting handled start to finish.
Book a Free Consultation- 4.9 Rating on Google
- Licensed Class B General Contractor
- Turnkey ADU Design & Permitting
The ADU Builder Westlake Village Homeowners Trust
Westlake Village was planned in the 1960s around Westlake Lake, right on the Los Angeles and Ventura County line. Its generous lots, HOA communities and lake views make it a great place for a guest house or rental unit. KN Remodeling is the ADU builder Westlake Village homeowners can count on to design an ADU that fits the neighborhood.
We are a licensed, insured, family-owned design-build team. One crew handles design, permits and construction, with a free in-home consultation, honest pricing, a schedule we keep and a written warranty on every ADU.
Services From Your ADU Builder Westlake Village Team
Detached Guest Houses
Standalone homes designed to match your main residence and neighborhood style.
Garage Conversions and JADUs
Turn a garage or spare room into a suite for family or guests.
HOA-Ready Design
Plans, colors and materials prepared for association review.
Hillside and View Lots
Foundations and drainage for sloped lots near the lake and hills.
Turnkey Design and Build
Plans, engineering, permits and construction handled by one team.
Premium Finishes
Quality materials and energy-efficient systems built to last.
Westlake Village: Two Counties, Different Rules
Westlake Village addresses can fall under two different cities, so the first step is knowing which one reviews your plans. A local ADU builder Westlake Village owners hire should check these details:
- City of Westlake Village: The incorporated city is in LA County and reviews ADUs under its own code.
- Thousand Oaks side: Many homes with a Westlake Village mailing address, including much of the lake area, are actually in Thousand Oaks in Ventura County.
- HOA communities: Most neighborhoods have HOAs that review exterior design, even though they cannot ban ADUs.
- Hillside and view lots: Sloped lots may need grading plans, soils reports and drainage design.
- Fire zones: Some hillside areas near the Santa Monica Mountains are high fire zones that require fire-hardened construction.
How Our ADU Builder Westlake Village Process Works
Here is what to expect when you partner with us on your Westlake Village ADU:
Free In-Home Consultation
We confirm your city and county, review HOA rules and talk through your goals.
Design and 3D Plans
Floor plans and renderings that match your home and HOA standards.
Selections
Choose roofing, flooring and fixtures within your budget.
City and HOA Approvals
We handle the right city review and prepare HOA submittals.
Construction
Our crew builds safely and cleanly, with regular updates.
Final Walkthrough
We review every detail with you before handing over the keys.
ADU Builder Westlake Village Costs
HOA design standards and premium finishes put many Westlake Village projects in the upper range. Typical ranges:
- Garage conversion or JADU: roughly $100,000 to $175,000
- Detached ADU, 500 to 850 sq ft: roughly $225,000 to $350,000
- Larger or hillside ADU: roughly $325,000 to $475,000 or more
Every ADU builder Westlake Village estimate we write is itemized, so there are no surprises. Learn more about the cost to build an ADU in Los Angeles and ADU rental requirements, or visit the City of Westlake Village website.
ADU Builder Westlake Village FAQs
Why hire a local ADU builder Westlake Village homeowners recommend?
Westlake Village addresses can fall under two cities and two counties, and most neighborhoods have HOAs. A local builder sorts out the right process from the start.
Is my home in Westlake Village or Thousand Oaks?
It depends on your address. The City of Westlake Village is in LA County, but many homes with a Westlake Village mailing address are in Thousand Oaks in Ventura County. We confirm this during the consultation.
Can my HOA stop me from building an ADU?
No. State law prevents HOAs from banning ADUs, but they can apply reasonable design rules. We prepare plans that meet both HOA and city standards.
Can I build an ADU with a lake or hillside view?
Often, yes. We place the ADU to capture views while meeting setbacks, grading limits and HOA guidelines.
How much does an ADU cost in Westlake Village?
Garage conversions often start around $100,000, and detached ADUs usually run about $225,000 to $350,000 depending on size and finishes.
How long does a Westlake Village ADU take?
Most projects take about 4 to 6 months for design, HOA review and permits, then 4 to 7 months to build.
Ready to Build Your ADU in Westlake Village?
Book a free in-home consultation with the ADU builder Westlake Village families trust and see what your property can support.
Book a Free AppointmentYour personal information is safe with us. We never share your details.
Browse ADU Builder Service Areas by Region
Select your neighborhood to see local ADU rules, project ideas and how KN Remodeling builds in your area.
San Fernando Valley
Los Angeles & Westside
South Bay & Peninsula
Conejo Valley & Ventura County
What Our Clients Are Saying
We are deeply honored by the feedback from our extensive list of 100+clients regarding our services.