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Mary Lou Castellanos

Real Estate Agent

One of the nation's most successful real estate professionals, Mary Lou offers her clients extensive knowledge of San Francisco's rich history, diverse communities and unique real estate market. Her stellar career has been built over more than two decades of representing a broad range of properties and clientele. She has been ranked among the top 25 agents with Sotheby's International Realty and is consistently in the top 2% of the nearly 50,000 worldwide sales associates of the firm's parent co

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Sources: BrightQuery (CDLA-Permissive-2.0); business website read 2026-10-14. About our data.