AI-generated summary reviewed by our newsroom.
Venetian-style villa at 125 Belvedere Ave. lists for $19.8 million and heads to auction.Property spans nearly 5,900 sq ft with five bedrooms, five full and five half bathrooms.Estate includes private pier, boathouse, boat dock with lift and a 51-foot Sea Ray yacht.
A Venetian-style bayfront villa on Belvedere Island on San Francisco Bay — complete with a private pier, boathouse and a 51-foot yacht — is headed to auction later this month.
The iconic waterfront estate at 125 Belvedere Ave. is listed for $19.8 million, and starting bids are expected between $8 million and $12 million, according to a news release. Concierge Auctions will hold the event in cooperation with Compass listing agents Steven Mavromihalis and John Fitzgerald. Online bidding is scheduled to open Aug. 25 and close Aug. 31.
Mavromihalis said the home belongs in a category where location and water access can’t be duplicated.
“125 Belvedere Avenue represents one of the most irreplaceable waterfront offerings in Northern California,” Mavromihalis said. “Properties like this simply cannot be recreated. Between its … architecture, protected bayfront setting, private pier and boathouse, sweeping views of the iconic Golden Gate Bridge, San Francisco skyline and Mount Tamalpais, this is the kind of legacy estate that may only come available once in a generation.”
Designed by architect Andrew Skurman, the villa is positioned on the southwestern shores of Belvedere Island and invokes Italy’s Portofino coastline. The home was completed in 2008 by Red Horse Constructors.
A 51-foot Sea Ray 510 Fly motor yacht, included with the listing, sits in the foreground of the bayfront estate at 125 Belvedere Ave. on Belvedere Island. Concierge Auctions
The materials point to craftsmanship-forward finishes — including patterned oak floors, Venetian plaster walls and terra cotta — paired with the kind of modern infrastructure that makes the steep waterfront site feel more accessible day to day.
One of the most unusual features unfolds at arrival. An exterior Swiss-engineered inclined elevator transports guests from the gated street entrance to the main level, according to the property listing. A separate interior elevator connects the floors inside.
On the main level comes a formal living and dining rooms, a family room, kitchen and pantry, plus a half bath. The space highlights a large entertainment deck outfitted with a fireplace and barbecue that becomes a staging point for watching the Bay and the skyline change from day to night.
The 5,895-square-foot home on San Francisco Bay heads to auction Aug. 25-31. Concierge Auctions
Occupying a full floor, the primary suite captures views, and offers dual bathrooms and a flexible adjoining space that could be used as a nursery, office or fitness room. Two en-suite guest bedrooms, an entertainment room with a dry bar, a detached guest casita and an adjacent office/business-center area round out the rest of the home.
The estate spans nearly 5,900 square feet on a little less than a half acre, with five bedrooms, five full bathrooms and five half bathrooms.
A Swiss-engineered inclined elevator carries guests from the gated street entrance to the home’s main level at 125 Belvedere Ave. on Belvedere Island. Concierge Auctions
The home’s waterfront elements are a major part of how it’s being marketed — and the features read more like a private marina than a typical luxury backyard. There’s a private pier, boat dock with lift, waterfront boathouse, seaside deck, tidal beach and direct beach access. The idea is indoor-outdoor living that doesn’t stop at a terrace or a pool edge, but continues down to the waterline.
The property also comes with a headline-grabbing extra: a 51-foot Sea Ray 510 Fly motor yacht included in the offering. The yacht is paired with a dedicated slip at San Francisco’s Pier 39, a way to step immediately into a Bay lifestyle from one of Marin County’s most exclusive residential enclaves.
Belvedere sits just across the Golden Gate Bridge from San Francisco.
The kitchen is part of the Venetian-style bayfront villa at 125 Belvedere Ave. on Belvedere Island. Concierge Auctions
Mavromihalis said the property is aimed at luxury buyers looking for both lifestyle and a long-term asset.
“Luxury buyers today are looking for experiences and assets that hold enduring value, and 125 Belvedere Avenue delivers both,” Mavromihalis said. “We expect it to resonate with buyers who understand just how uncommon opportunities like this have become, and what a treasure it would be to own it.”
Decks at the Belvedere Island villa overlook San Francisco Bay, with views of the Golden Gate Bridge and the San Francisco skyline. Concierge Auctions 
The Lumiere House, a conical waterfront home in Point Richmond, Calif., is seen from the San Francisco Bay. The architect-designed house at 331 Wester Drive is listed for $899,000. Open Homes Photography
This story was originally published August 10, 2026 at 2:54 PM.
The Sacramento Bee
David Caraccio is a video producer for The Sacramento Bee who was born and raised in Sacramento. He is a graduate of San Diego State University and a longtime journalist who has worked for newspapers as a reporter, editor, page designer and digital content producer.