The 5,000-square-foot mansion at 46 Cliff Road in Belvedere, California, hit the market for $32 million less than a year after its completion. Quinta Properties LLC, a local family-owned builder linked to Rudolph Koppl, listed the three-storey home through Sotheby's International Realty. The property features four bedrooms, five bathrooms, and direct street-to-water access—a rarity on the island. The current owners, who acquired the site this year, are selling to make room for a larger residence they are currently constructing elsewhere.
The price tag reflects a dramatic shift in the local market. The lot itself was last sold in May 2019 for just $2.1 million as vacant land. In roughly seven years, the transformation from dirt to turnkey luxury home has generated a windfall that mirrors the broader velocity of wealth in this enclave. Tania Toubba, the listing agent, noted that the owners had initially intended a long-term stay but ultimately “decided they need more space.”
Buyers get more than just square footage; they acquire unobstructed views of the San Francisco skyline, the Golden Gate Bridge, and Mount Tamalpais. The layout is designed for hosting, with multiple terraces, a spa with a built-in hot tub, and a modern kitchen featuring stone counters and a gas cooktop. Wood and stone flooring anchor the open layout, avoiding the visual weight of carpeting. It is one of the few properties on the island offering both street and water frontage, a geographical quirk that drives scarcity.
This listing arrives amid a surge in ultra-luxury transactions on the peninsula. The market heated up significantly after Jony Ive, Apple’s design chief, completed a surprise $73 million acquisition in September 2025. Ive bought four homes in a single off-market deal, including a five-bedroom, 11-bathroom property that previously sold for $43.5 million. His move effectively assured the ultra-luxury tier of Belvedere and triggered immediate price adjustments across the island. One estate down the hill from Ive’s compound bumped its asking price by 10% within days of the news breaking.
Activity continues to pick up pace. Last month, 125 Belvedere Avenue sold for $16.9 million, bypassing a Concierge Auctions listing. Down the road, a nearly 10,000-square-foot property at 20 Crest Road is asking $50 million, which would set a residential record for Marin County if the sale closes. The limited buildable land on the island, surrounded by water, ensures that supply remains tight while demand from high-net-worth individuals continues to climb.