A bitter property dispute is disrupting the calm of an affluent California community, where the owner of a multimillion-dollar estate is facing intense opposition over plans for a second driveway.
Residents of Hidden Valley in the Bay Area say the proposed access road would destroy a well-used trail that has served local families, children and dog walkers for generations.
The 11-acre property changed hands in 2021, when WeWork co-founder Adam Neumann sold it for $22.4 million. Zillow now places its estimated value at nearly $29 million, though the estate is not currently listed for sale.
The owners want the additional driveway for convenience and say it could provide a vital emergency route during a wildfire, the San Francisco Chronicle reported. The estate was once owned by legendary music promoter Bill Graham and became known as the “Guitar House” because of its distinctive design.
A similar proposal was introduced in 2024, but a neighborhood opposition group successfully challenged it, leading to the town planning commission’s decision being overturned.
“They’ve been asked and asked—show us proof of ownership—but there’s no proof,” opposition leader Karen Lorentson told the Chronicle.
Officials also concluded that the environmental damage associated with constructing the driveway would outweigh any practical advantages.
The property owners have now filed a lawsuit against the town, seeking to revive their plan and move ahead with construction behind closed doors, according to the San Francisco Chronicle.
The Guitar House was once owned by renowned music promoter Bill Graham. WeWork co-founder Adam Neumann later owned the estate before selling it for $22.4 million in 2021.
Plans for a second driveway at the 11-acre estate have triggered a bitter feud in the normally quiet Corte Madera, California, community.
The disagreement has escalated well beyond a planning dispute, with residents directing insults at the estate’s owners and allegedly making threats against them.
A remark involving the owners’ children became serious enough that the family requested police protection for a public meeting, the Chronicle reported.
Town Council Member Pat Ravasio, who opposes the driveway project and is seeking re-election, has argued that the land should remain open to the public.
The controversy deepened after Ravasio allegedly shared confidential details from a closed council session with residents who also oppose the proposed access road.
The disclosure prompted the town to refer the matter to the Marin County Attorney’s Office for review.
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Ravasio described the disclosure as “one little error,” but said the fallout had been intense. “They came after me, and it’s been pretty ugly,” she said.
At the center of the legal fight is a 1906 map of the property. Both sides cite the document, which shows that a road similar to the proposed route was envisioned but never built.
Todd Williams, the attorney representing the owners of 800 Corte Madera Ave, told the Chronicle that Alta Way was “always intended to be a road” and has been used and maintained in that manner for more than 40 years.
Williams said the owners believe their property rights extend to the centerline of Alta Way, giving them the legal authority to construct the driveway.
“Throughout this controversy, the owners have clearly expressed their intentions that, post-construction, the walking access will remain.”
Pat Ravasio led the neighborhood opposition against the proposed driveway and insists the trail should remain open to the public
The neighborhood opposition managed to overturn an initial proposal for the driveway last year but the owners of the real estate sued the town afterwards
Corte Madera community development director, Amy Lyle, said town records show that the contested path cannot be claimed as a public road
‘The two uses – walking and driving – can co-exist, just like any other neighborhood road in Corte Madera,’ Williams explained in a statement.
The proposal would in fact keep access to the trail open to the public but pave half of the 40-foot-wide strip for about 120 feet.
Concerned neighbors said they are worried about the driveway being built on the reportedly steep hillside and that it would destroy the immediate connection between residential living and nature.
The road would also see 47 trees removed, 37 of which would be replanted, although the Marin Audubon Society shared worries about negative impacts on a nearby owl habitat.
Corte Madera community development director, Amy Lyle, has put a damper on the neighbors’ hopes to preserve the trail by claiming Alta Way as a public road.
She said that a look into town records led the town to view the issue a civil matter among real estate owners as ‘we don’t have the rights to the paper road,’ making it unlikely the town can intervene.