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Westlake Village, Los Angeles County
ADUs & home additions in Westlake Village, CA.
High-end homes, HOA communities and lake-adjacent lots. ADUs and additions in Westlake Village need to meet both the city's requirements and the neighborhood's standards.
Building in Westlake Village
Quality that fits the neighborhood.
Westlake Village homeowners expect finishes and detailing that match the quality of the main house, and most neighborhoods have an HOA with design guidelines.
ADUs and additions can respect those guidelines on materials, colors and rooflines while using the rights state law gives homeowners. Expect finishes and detailing that match the quality of the main house.
Westlake Village sits in Los Angeles County, but it is part of the Conejo Valley area we serve, alongside Thousand Oaks and Agoura Hills.
What to know in Westlake Village
- In a February 2026 letter, HCD said the most recent ADU ordinance it had on record for Westlake Village was from 2022 and “may be outdated and out of compliance with State ADU Law”.
- HCD's letter also reminded the city that homeowners’ associations cannot influence ADU permit approval and that deed restrictions on ADUs are barred by state law.
- Where a local ADU ordinance is outdated, current state ADU standards apply; confirm the requirements for your parcel with the city.
Project types in Westlake Village
ADUs and additions in Westlake Village.
ADUs
Accessory dwelling units of every type, from feasibility and permits through final inspection.
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Garage-to-ADU Conversions
Reuse an existing garage for the fastest, most economical path to a complete ADU.
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Detached ADUs
Freestanding backyard homes with full foundations, framing, utilities and finishes.
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Attached ADUs
Units that share a wall with the main house, including attached-garage conversions.
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Junior ADUs (JADUs)
Up to 500 square feet created within your existing home, with an efficiency kitchen.
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Home Additions
Room additions, kitchen expansions and roof decks built to blend with your home.
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Second-Story Additions
Build up instead of out, with structural evaluation, engineering and framing done right.
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Primary Suite Additions
Master bedroom and bathroom additions with closets, showers and soaking tubs.
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Westlake Village ADU & addition questions
Can my HOA in Westlake Village block an ADU?
No. HCD has reminded the city that HOAs cannot influence ADU permit approval. HOA design guidelines may still affect materials and appearance.
Which ADU rules apply in Westlake Village?
HCD noted in 2026 that the city's last ordinance on file dates from 2022 and may be outdated. Current state ADU law sets the minimum standards. The contractor confirms local requirements during feasibility.
Can an ADU in Westlake Village match a high-end home?
Yes. Materials, windows, rooflines and finishes can be specified to match the main house and HOA guidelines.
Nearby areas
Also serving areas near Westlake Village.
Free consultation
Planning an ADU or addition in Westlake Village?
Share a few details about your property and the space you want to add. We will pass your request to a licensed local general contractor who specializes in ADUs and additions, and they will follow up directly.
- Free consultation and site visit
- A realistic budget conversation before you pay for plans
- A licensed general contractor from permit to final