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Golden Gate Bridge

Whether $300,000 or $300 million...

every one of my clients  receives concierge-level, luxury treatment.

About
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James Kastner

Since stepping into the real estate scene in 2002, my name has become synonymous with innovation and strategic thinking. My career took off in San Francisco, where I was a key player on a top-performing team. I made a splash by creating the city's first property website using basic HTML in 2002, setting the stage for a series of industry firsts, including custom CMAs and professionally printed marketing collateral such as value point signs and multi-page brochures. I have continued to lead the way with high-quality marketing materials, consistently setting a new bar for the industry.

"James' mind works at another level from the rest of us humans."

Shelly S.

Sotheby’s is more than
just our name.

Over the last two centuries, Sotheby’s Auction House has built an iconic brand with unparalleled prestige.

Today, Sotheby’s International Realty builds on its legacy with the auction house by offering the same elevated standards and exemplary service.

We harness the global power of the Sotheby’s name and its proprietary database of 1 million clients to create unique opportunities and to introduce your property to the most qualified buyers around the world.

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PHONE

EMAIL

‪(415) 494-7236‬

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Sotheby's International Realty

117 Greenwich Street

San Francisco, CA 94111

DRE 01369951

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© 2025 James Kastner & Co., LLC & Sotheby’s International Realty. All Rights Reserved. Sotheby’s International Realty® is a registered trademark and used with permission. This website is not the official website of Sotheby’s International Realty. Sotheby’s International Realty does not make any representation or warranty regarding any information, including without limitation its accuracy or completeness, contained on this website. Real estate agents affiliated with Sotheby’s International Realty, Inc. and some independently owned offices are independent contractor sales associates and are not employees of Sotheby’s International Realty. Equal Housing Opportunity.

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