Pacific Heights Landmark Sold for $7.7 Million in September
The 8,215-square-foot Slows-Lilienthal House on California Street traded for $940 per square foot.
Updated on Oct. 5, 2026 in Residential
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The historic Slows-Lilienthal House at 1818 California Street sold in a private transaction this September. The buyer is an artificial intelligence researcher at Google DeepMind who acquired the 1870s property from the Nakamura Family LP.
Why it matters
The sale highlights the ongoing demand for historic mansions in Pacific Heights among technology workers, contributing to a tightening inventory of luxury real estate in the city. This high-end activity follows a string of notable mansion sales in the neighborhood throughout 2026.
The home sold for $7.7 million, or $940 per square foot, a valuation emerging during a year that saw several major local sales like the $56 million trade at 2898 Vallejo Street.
The players
Arvind Ramanthan Neelakantan
The Google DeepMind artificial intelligence researcher who purchased the historic home.
Nakamura Family LP
The entity that served as the seller for the California Street property.
The details
The 8,215-square-foot residence, officially designated as a San Francisco landmark, represents the latest high-value transfer in a competitive market. The transaction was finalized privately by the Nakamura Family LP. The buyer, an employee at Google DeepMind, joins other tech-industry professionals who have recently secured properties in the area.
Timeline
The house was originally constructed in the 1870s.
The sale of 1818 California Street was completed in September 2026.
Across the Bay
This sale follows a series of high-value mansion trades throughout 2026 at addresses like 2315 Broadway and 2880 Vallejo. It marks a continued trend of significant capital investment by technology professionals into San Francisco's historic residential stock.
Residents in Pacific Heights may see continued interest in large-scale properties as tech sector demand persists. This sale keeps one of the city's designated landmarks off the open market.
The takeaway
Historic preservation remains a focal point for buyers in the neighborhood even as ownership patterns shift toward the tech industry. Keep an eye on local real estate filings to see if other landmark properties on the California Street corridor change hands.
Further reading
For more on market trends, visit San Francisco Residential.
Source note: This article includes information reported by The Real Deal New York.
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