Belvedere Island home to auction with $17 million ask

A 11,200-square-foot Belvedere Island estate with Golden Gate Bridge views will sell through Concierge Auctions in December, with bidding set to open Dec. 4 and end live Dec. 16 in New York. The property offers rare Bay Area privacy, major indoor-outdoor amenities and access to San Francisco within about 35 minutes by car.

Why it matters: - The sale puts one of Belvedere Island’s larger homes on the auction block in a tightly held Bay Area market. - The property combines privacy, waterfront access and views of the Golden Gate Bridge, San Francisco skyline, Sausalito and Mount Tamalpais. - The auction format could draw buyers looking for speed and certainty in a high-end market near San Francisco’s technology and AI hub.

What happened: - Concierge Auctions will sell 337 Belvedere Avenue in cooperation with Monica Costa of Engel & Völkers. - The residence is listed for $17 million. - Starting bids are expected between $7 million and $12 million. - Bidding opens Dec. 4 and culminates live on Dec. 16 at Concierge Auctions’ End-of-Year Global Sale at The Dominick in New York City. - The home is on the western slope of Belvedere Island, an exclusive island enclave in the San Francisco Bay.

The details: - The contemporary residence was built in 2008. - The home spans 11,200± square feet on 0.54 acres. - The property has six bedrooms and is described as being on the sunny side of Belvedere. - Floor-to-ceiling glass brings in natural light throughout the house. - Terraces and outdoor living areas are positioned for afternoon and evening light and Bay sunsets. - A 60-foot indoor swimming pool opens to the adjoining lawn. - One level is dedicated to recreation and wellness, with space for exercise, relaxation and a secondary kitchen. - The house includes a climate-controlled wine cellar for about 1,800 bottles, four fireplaces, a wet bar and two elevators. - The garage fits up to three vehicles, with additional guest parking on the property. - Landscaping screens the grounds, which also include citrus trees, lawn space and outdoor gathering areas. - The property is within walking distance of the Tiburon ferry. - The ferry ride to San Francisco’s Ferry Building takes about 25 to 30 minutes. - Downtown San Francisco is about 35 minutes away by car outside rush hour. - Nearby outdoor destinations include Angel Island State Park, Muir Woods and Mount Tamalpais. - Images of the property are available online, with photography credited to Aerial Canvas.

Between the lines: - The listing targets buyers who want a retreat-like setting without giving up access to San Francisco. - Belvedere’s limited inventory and island location help explain why homes there are marketed as rare opportunities. - Concierge Auctions is leaning on its broad buyer database and global sale platform to reach luxury purchasers beyond the local market. - Chad Roffers said the Bay Area’s technology and AI growth, including Anthropic’s planned IPO, is helping expand the pool of buyers seeking exceptional properties. - Monica Costa said the home stands out for architectural distinction, privacy and resort-style living, along with a dedicated wellness level.

What's next: - Interested buyers can review property details and diligence documents at ConciergeAuctions.com. - Concierge Auctions said closing the sale will trigger a contribution through its Key For Key® giving program with Giveback Homes. - The program funds new homes for families in need.

The bottom line: - This is a rare ultra-luxury Bay Area estate with major views, amenities and proximity to San Francisco, and the auction timeline is short.