What makes a home listing stand out? Sometimes its historicity, sometimes it’s architectural daring, and sometimes it’s the insight that a property can provide about a city or neighborhood.

But maybe the simplest way is just to be worth a whole pile of money, as in the case of 9 Walsh Drive, which listed this week and became the new most expensive home on the market in Mill Valley at $12.5 million.

That’s not quite the priciest Mill Valley home of the year–back in June, the sprawling 6,000 square foot home at 435 Ralston sold for $13.5 million. But the Ralston address was actually an underbid by a few hundred thousand dollars, so 9 Walsh has the opportunity to perhaps beat it out in the end.

And whereas the Ralston home dated to the 90s, 9 Walsh is close to brand new, dating just to 2015. The property last sold back in 2010 for $4 million–back then it was a different, smaller home (although at more than 4,000 square feet, still quite generous) owned by the cofounder of the Amazon-acquired Internet traffic firm Alexa.

Note that this is actually far from the biggest ticket home on sale in the North Bay right now–the priciest home for sale in Marin County is a $60 million property up in Belvedere. That said, $12.5 million is obviously a sum to write home about–assuming a buyer cashes in out.

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