This article dives into a rare, off-market luxury residence on Belvedere Island in Marin County. It’s a mid-century modernist masterpiece by William Wurster with landscape design from Thomas Church.
Listed at $50 million, this hilltop estate shows off panoramic views that stretch from the San Francisco skyline to Sausalito and Mount Tamalpais. It’s a striking example of Bay Area design, and honestly, it’s the kind of place that resonates with Marin County folks, whether you’re in Belvedere or Tiburon.
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A Marin County Icon on Belvedere Island Seeks a New Owner at $50 Million
You’ll find this off-market listing tucked away on Belvedere Island, just a short drive from Mill Valley and San Rafael. It’s easy to get to the laid-back, ferry-district vibe of Sausalito from here.
The home’s hilltop spot means you get those rare, uninterrupted bay views that people in Marin dream about. Not many places can say the same.
Architectural Legacy: William Wurster and Thomas Church
William Wurster designed the home, and his Bay Area modernism really set the tone for Marin County’s architecture. Thomas Church handled the landscape, and together, their work feels like a conversation between the house and its surroundings.
In this tucked-away part of Belvedere, you can see how Wurster’s crisp lines and hillside integration blend with Church’s lush, classic plantings. Buyers in Ross or Corte Madera often chase this kind of harmony in luxury homes.
Interior Layout and Primary Features
Back in 1967, a state attorney general and his wife had this home built. It sits on just under an acre, spread across two connected parcels at the end of a quiet cul-de-sac.
The home offers inverted living space over three levels. Here’s what you get:
- 9,170 square feet of living space
- Eight bedrooms and nine full bathrooms, plus two powder rooms
- Elevator access between levels and a winding skylit staircase
- Top-floor living areas with a limestone-clad foyer and a wood-paneled living room
- Green marble fireplace, retractable screen, and a curving wall of windows opening to a full-length deck
- Kitchen with an eat-in island, mosaic-tiled backsplash, and a fireside breakfast/lounge area
- Separate prep kitchen and workstation, flanked by a family room and formal dining room
The middle level holds six en-suite bedrooms. There’s an octagonal primary suite with its own balcony, a walk-in closet, and a marble bath.
Downstairs, you’ll find another en-suite bedroom and a one-bedroom guest suite with a kitchenette and private deck. This setup keeps things flexible, whether you want privacy or need to host guests from San Anselmo or Ross.
Outdoor Living, Views and Marin County Setting
Outdoor living really takes center stage here. Multiple terraces, patios, and winding pathways run through mature landscaping and flat grassy lawns.
A sun-drenched pool sits among the terraces. There’s even a dedicated sport court, perfect for active days with the Sausalito harbor and San Francisco skyline in the background.
The property covers two connected parcels, giving you nearly an acre on a secluded Belvedere cul-de-sac. It’s the kind of spot that Marin County purists love—think Mill Valley hillside breezes and the distant sound of Tiburon boats.
- Large L-shaped recreation room with exercise space
- Terraces, multiple decks, and pathways for outdoor entertaining
- Sundeck-encased pool and a sport court for year-round activity
- Attached two-car garage with parking for up to 12 additional vehicles
Practical Details: Accessibility and Parking
The elevator connects all three levels, making life just a bit easier. There’s plenty of parking, too, which means friends from Belvedere, Larkspur, or San Rafael can drop by without hassle.
If this place sells anywhere near asking, it could set a Marin County record for a single residence. That would only cement Belvedere Island’s reputation as the go-to address for buyers from San Francisco to Mill Valley.
Market Context and Community Ties in Marin
In Marin County’s luxury market, this property’s off-market status and its $50 million price tag put it right at the center of local conversation. Folks from Sausalito to Ross and San Anselmo will probably notice how the home’s story—built in the late 1960s, then renovated with a $5 million investment—still reflects that Bay Area modernism vibe, but with a Marin twist.
For people in Belvedere and across Marin County, the estate feels like more than just a house. It’s really a story about design, weather, and the way people connect here.
The home mixes big, showy spaces with quiet, private suites. That pretty much nails what luxury living means in Marin, where water, hills, and redwood skies are just part of the daily routine. Residents in Tiburon, Sausalito, or Mill Valley will know exactly what that feels like.
Marin County keeps drawing both locals and newcomers—people who want Belvedere’s privacy, Sausalito’s creative buzz, or Mill Valley’s family vibe. This off-market home stands out as a rare shot at owning a real architectural gem, something that’s part of Marin’s mid-century modern legacy and rooted in one of Belvedere Island’s most legendary spots.
Here is the source article for this story: Marin County’s Priciest Listing Is This $50 Million Hilltop Mansion on Belvedere Island
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