Westlake Village, CA
Westlake Island
Westlake Island is a private, guard-gated community built on a man-made island inside 125-acre Westlake Lake, reached by a single bridge, La Venta Drive. The island itself straddles the Los Angeles County and Ventura County line: homes on Whitesail Circle and Mainsail Circle sit in the incorporated City of Westlake Village on the Los Angeles County side, while homes on Topsail Circle, Windward Circle, and Leeward Circle sit in the City of Thousand Oaks on the Ventura County side, a split confirmed by direct county-boundary data. That means school district and other jurisdiction-dependent facts can differ street to street within the same gated perimeter, rather than following from the community's single name or gate. The island's own homeowners association, a distinct nonprofit separate from the lake's broader management association, handles day-to-day rules, while boating and dock use on the lake itself require separate registration regardless of island residency. The mainland approach lands directly at Westlake Village's lakeside dining cluster, close enough that one restaurant there offers dockside pickup by boat.
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The information being provided by Conejo Simi Moorpark Association of REALTORS® ("CSMAR") is for the visitor's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties a visitor may be interested in purchasing or leasing. Information relating to properties referenced on this web site may originate from the Internet Data Exchange (IDX) program of CSMAR. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. Any information originating from CSMAR, relating to a property, regardless of source, including but not limited to square footages and lot sizes, is deemed reliable but not guaranteed and should be personally verified through personal inspection by and/or with the appropriate professionals. Listing data originating from CSMAR is copyrighted by CSMAR and is protected by all applicable copyright laws. Any dissemination of this information is in violation of copyright laws and is strictly prohibited. Listing data last updated September 11, 2026.
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Local real estate guidance for Westlake Island
Sean San Jose is a top real estate agent and REALTOR® serving Westlake Village, including Westlake Island.
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What defines it
- The island straddles the Los Angeles County and Ventura County line, confirmed by direct county-boundary data
- Whitesail Circle and Mainsail Circle sit in the City of Westlake Village (LA County); Topsail, Windward, and Leeward Circles sit in the City of Thousand Oaks (Ventura County)
- Guard-gated per the lake management association's own description, though specific gate hours aren't independently confirmed
- The island's own homeowners association is a distinct nonprofit, separate from the lake's broader management association
- Boating and dock use on Westlake Lake require separate registration, regardless of island residency
The Housing Stock
Westlake Island's homes sit across two counties and two school districts within one gated perimeter, so jurisdiction, not just lot size or dock access, is part of what varies from street to street here.
Frequently asked
Is Westlake Island entirely inside the City of Westlake Village?
No, a common assumption that turns out to be incorrect. The island itself straddles the Los Angeles County and Ventura County line: Whitesail Circle and Mainsail Circle sit in the incorporated City of Westlake Village, while Topsail Circle, Windward Circle, and Leeward Circle sit in the City of Thousand Oaks, confirmed by direct county-boundary data.
What school district serves Westlake Island?
It depends on the street. Homes on the Los Angeles County side, such as Whitesail Circle and Mainsail Circle, fall under Las Virgenes Unified, zoning to White Oak Elementary, Lindero Canyon Middle, and Agoura High. Homes on the Ventura County side, such as Topsail, Windward, and Leeward Circles, fall under Conejo Valley Unified instead. Confirm the exact address against each district's own boundary tool before assuming either one.
Is Westlake Island gated?
Yes, per the lake management association's own description of it as a gated and guarded community. Specific gate hours and visitor policy weren't independently confirmed from a public source as of July 2026, so contact the island's own homeowners association directly for current procedures.
Does every home have a private boat dock?
Not confirmed as universal. Private docks are a widely reported feature of the community, but descriptions of individual homes vary between lake frontage, a private dock, or greenbelt views, so this should be confirmed on the specific listing rather than assumed island-wide.
Can I use the lake if I live on Westlake Island?
Not automatically. Boat use and dock registration on Westlake Lake require separate registration with the lake's management association under its own access policy, regardless of island residency, so lake rights shouldn't be assumed to come bundled with a purchase here.
Can residents walk or boat to dinner without leaving the community by car?
Both. The Landing Grill & Sushi Bar and Boccaccio's Restaurant sit close to the island's mainland approach, and The Landing's own site specifically advertises dockside pickup, meaning boat access is a live option as of July 2026.
