By admin 
Four eye-popping listings have hit the market across Northern California, ranging from a $50 million Marin County crown jewel to a French chateau-style estate towering over Granite Bay. Each property offers a different window into how the region’s wealthiest buyers are living — and what they expect when they shop at the top.
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Here’s a look at four standout homes currently for sale.
Marin County’s priciest listing: $50 million on Belvedere Island
Perched at the end of a cul-de-sac at the very top of Belvedere Island, the estate at 20 Crest Road has hit the market for $50 million — Marin County’s most expensive home listing.
The 1967 home is a Modernist build with eight bedrooms, 11 bathrooms and 9,170 square feet across three levels, plus a fully equipped apartment. The grounds cover nearly an acre over two contiguous parcels, with a pool, sport court and off-street parking for more than 12 cars. From the crest of the island, the view sweeps from the Bay Bridge across the San Francisco skyline to the Golden Gate Bridge, Sausalito and Mount Tamalpais.
Listing agent Bill Smith of Compass, according to The Sacramento Bee, said the home’s understated character is intentional.
“This home is one of the most special I have ever had for sale,” he said. “Its style is understated so as not to distract from the setting at the top of the island with unparalleled views. Its privacy is paramount for the buyer who wishes to remain isolated from the busy world.”
The property carries architectural pedigree. The listing describes the residence as a “9,170 square foot Modernist masterpiece designed by renowned architect William Wurster,” whose career included leading architecture departments at MIT and UC Berkeley and earning the AIA Gold Medal for lifetime achievement. The outdoor spaces were “designed by acclaimed landscape architect Thomas Church,” with terraces, patios and meandering paths stepping down through mature plantings to lawns, a swimming pool and a sport court.
Inside, a living room features “curving walls of glass showcasing sweeping views of the San Francisco Bay,” plus a fireplace and a retractable screen tucked into the ceiling. The kitchen includes a large island, Sub-Zero, Wolf and Miele appliances, and a butler’s pantry with a second cooking station. An elevator serves all three floors.
Smith framed the sale as a generational transition.
“This home served as a family retreat for 48 years,” he said. “With the growth of the family to more generations they felt the home had served its purpose.”
Marin County’s highest sales price was set in 2015 when historic Locksley Hall sold for $47.5 million, according to the Wall Street Journal.
Tiburon’s $19.9 million ‘hovering’ contemporary
A few miles away, a newly listed contemporary home on the Tiburon Peninsula is making a different kind of statement: it’s designed to look like it’s floating.
The 4,470-square-foot, four-bedroom, five-bathroom home at 1860 Mountain View Drive is on the market for $19.9 million, making it Tiburon’s most expensive current listing. The co-listing agents are Alexander Fromm Lurie of City Real Estate and Joshua Deitch of Coldwell Banker.
The property description leans heavily into the setting: “At the crown of the Tiburon Peninsula, 1860 Mountain View Drive commands a panorama so sweeping it reads like a map of the Bay’s most iconic landmarks: the Golden Gate Bridge, the San Francisco skyline, Angel Island, Sausalito, Belvedere, the Marin Headlands, and Mount Tamalpais.”
The house is built around a cantilevered steel structure designed to push the eye outward, toward the horizon.
“Designed as a cantilevered, glass-wrapped structure, the residence appears to hover above the landscape, framing the Golden Gate Bridge, the San Francisco skyline, Angel Island, and Mount Tamalpais in one continuous, cinematic sweep,” according to marketing materials.
Five NanaWall indoor-outdoor disappearing glass door systems stand 11 feet tall. Inside, the palette runs to book-matched olivewood paneling, French limestone, Statuario marble, Pacific red cedar ceilings, Venetian plaster and white oak flooring. There’s a primary chef’s kitchen plus a full catering kitchen, both with Miele appliances. Outdoors features an infinity-edge pool, Ipe decks, flamed granite terraces and an outdoor kitchen — plus a level lawn, which marketing materials call “rare for hillside estates.”
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The property last sold for $17.5 million in 2022 and is owned by Kurt Sturn through a trust entity, according to public property records.
Granite Bay’s biggest listing: French chateau vibes for $5 million
Closer to Sacramento, the largest home for sale in Granite Bay rises three stories and spans 12,000 square feet, with six bedrooms and nine bathrooms. The estate at 9300 Touchstone Court is listed for just under $5 million, sits on 4.1 acres and comes with an additional 1.9-acre parcel.
“When you come down the court and see this house — a three‑story home on the hillside — it isn’t like anything else you’ve ever seen,” listing agent Samantha Gray of eXp Realty told The Sacramento Bee. “It’s not your traditional Mediterranean home, it’s not the modern farmhouse you see every day. It is truly spectacular.”
Sacramento appraiser and housing market analyst Ryan Lundquist described the property in an email as having “a private feel,” adding that the home “is positioned at the top of a hill, and it looks down on landscaping with French chateau vibes.”
The main level includes the kitchen, formal dining, formal living room, family room, office, primary suite and laundry. Amenities include a private movie theater, a large home gym, a temperature-controlled wine room that Gray said can accommodate 2,000 bottles, a steam room, a dry sauna and an infrared sauna. An elevator and a dumbwaiter serve all three levels.
“The home is run by a full Savant System, so everything is automated — from the pool to the lighting and audio,” Gray said.
Outside, a pool features “a slide artfully carved into the property’s natural granite boulders,” according to the listing. An entertaining zone called “Vikings Hall” includes an outdoor kitchen, pizza oven, bocce ball court and a table to seat 20 or more.
Lundquist called the size unusual for the region.
“Homes above 10,000 square feet are only 0.01% of all sales since 2025, so a size like this is a unicorn in the marketplace,” he said.
Since 2021, there have been 15 sales above $5 million in the region — four in Granite Bay and seven in Loomis.
Late Giants owner’s $13 million Napa vineyard estate
In Napa Valley, the St. Helena estate of former San Francisco Giants owner Peter Magowan and his wife, Deborah, is listed for $13 million. The 20-acre compound at 150 Mills Lane includes seven bedrooms, six full bathrooms and 7,175 square feet of interior space, according to The Sacramento Bee.
The property is “designed for both relaxed living and large-scale entertaining,” the listing states, with a resort-style pool and spa, an outdoor kitchen pavilion and a dedicated catering kitchen. Infrastructure includes solar power, multiple wells, advanced irrigation and a Control4 smart home platform.
The calling card is the vineyard: roughly 15 acres of planted vines including Sauvignon Blanc, Cabernet and Petite Verdot. The Magowans maintained the vineyards and harvested grapes that were sold to wineries, and frequently hosted holidays and birthday parties at the home, Debbie Magowan told the Wall Street Journal.
Peter Magowan died in 2019 at age 76. Ginger Martin of Sotheby’s International Realty – St. Helena Brokerage is the listing agent.
This report was produced with the assistance of a proprietary tool powered by artificial intelligence based on our own originally reported, written and published content. Before publishing, journalists reviewed this content in compliance with McClatchy Media’s AI policy.
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