A residential property in Mill Valley, California is being marketed with an unconventional payment requirement, according to real estate listings. The 13-acre estate, located just north of San Francisco in the Bay Area, must be purchased using equity in artificial intelligence company Anthropic rather than traditional currency.

The property listing represents an unusual approach to real estate transactions in the high-value Bay Area market, where technology wealth has driven significant appreciation in housing prices over recent years.

Mill Valley, situated in Marin County, is known for its affluent residential properties and proximity to Silicon Valley's technology corridor. The area has attracted numerous technology executives and investors who have benefited from the growth of major tech companies.

Anthopic, the AI company whose equity is being sought for the transaction, was founded by former OpenAI executives and has gained prominence in the artificial intelligence sector. The company has raised significant venture capital funding and developed large language models competing with other major AI platforms.

The specific details of how the equity-based transaction would be structured, including valuation methods and transfer mechanisms, were not immediately available. Such alternative payment arrangements are rare in residential real estate but have occasionally emerged in markets with concentrated wealth from specific industries or companies.