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William Hearst III, grandson of media magnate William Randolph Hearst, has listed his private 5-acre gated estate in Mill Valley, California, for sale. The property, designed by architect Sandy Walker, is a significant offering in the Bay Area's luxury real estate market, featuring panoramic views, an infinity pool, and direct access to nature. For potential buyers, this represents a rare opportunity to acquire a meticulously designed freehold property—a type of ownership where you own the land and buildings outright—in one of the San Francisco Bay Area's most coveted suburbs.
What Are the Key Features of This Mill Valley Property?
Located in an upscale, wooded suburb north of San Francisco, the estate is defined by its privacy and natural surroundings. The main residence, built in 1994, spans 5 bedrooms and 4.5 bathrooms. A key architectural feature is the use of natural light through a 30-foot atrium and a 20-foot skylight. The primary bedroom suite on the first level includes a fireplace, a private office, and wraparound decks. The en suite bathroom is equipped with high-end amenities like a sauna, steam shower, and a soaking tub that frames views of the redwood trees and verdant hills. The grounds include an infinity pool, a large pool deck, extensive gardens, and a three-car garage.
What is the Location and Lifestyle Appeal?
The property's value is heavily influenced by its location. Mill Valley is known for its high quality of life, top-rated schools, and proximity to both nature and the city. The estate is minutes from hiking trails and a short drive to Stinson Beach. Downtown Mill Valley offers shopping and dining, while the financial and cultural centers of San Francisco are accessible via a drive over the Golden Gate Bridge. This combination of seclusion and convenience is a major draw. Based on our experience assessment, properties with such a balance of natural amenities and urban access command premium prices in the current Marin County market.
Who is the Seller and What is the Property's Pedigree?
The seller, William Hearst III, is the current chairman of the Hearst corporation, one of the nation's largest media and information companies. He is the grandson of William Randolph Hearst, who built the famed Hearst Castle in San Simeon, California. While this Mill Valley property is a private residence and not a historic landmark like Hearst Castle, its association with the Hearst family adds a unique narrative. The home was designed by a respected local architect, Sandy Walker, emphasizing a connection to the Northern California landscape, which enhances its architectural credibility.
What Should Potential Buyers Consider?
Prospective buyers for a property of this caliber should be prepared for the associated costs of a high-value estate. This includes significant annual property tax—a levy imposed by the government on the value of a property—and maintenance for features like the infinity pool and expansive gardens. A crucial step in the real estate transaction process is obtaining title insurance, a form of indemnity insurance that protects against financial loss from defects in the title to the property. Given the property's size and custom design, a thorough inspection is recommended to assess the condition of specialized systems.
Conclusion
The listing of William Hearst III's Mill Valley estate is a notable event in the 2026 luxury real estate market. The property stands out for its architectural design, privacy, and unparalleled location. For qualified buyers, the key steps are to secure financing pre-approval, engage a real estate attorney to review the contract, and commission a specialized property inspection to ensure a sound investment.
