This modernist gem, tucked away on Marin County’s Belvedere Island, packs a triple whammy. Not only was the home created by noted Bay Area architect William Wurster and pioneering landscape designer Thomas Church, but it’s perched on a hilltop site with panoramic vistas stretching from the San Francisco skyline to Sausalito, Mount Tamalpais, and the Golden Gate Bridge.

Completed in 1967 for California deputy attorney general Leonard M. Sperry Jr. and his wife, Rita, the property sold for only the second time in 1979 for $1.2 million. It later underwent a two-year, $5 million renovation. Now, after serving as a family retreat for almost five decades, the revamped spread has just come available through Bill Smith and Ann Aylwin of Compass as an off-market listing at $50 million. It would set a Marin County record if it sells near the asking price.

Three levels are serviced by a winding staircase and an elevator.

Jeffrey Frisk

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