Hillsborough's $78.8M Deal Could Be 2026's Biggest Sale
A 12-acre Hillsborough estate went into contract at $78.8 million. Here is what a record sale does to Peninsula comps, and what it does not.
$78.8 million is about fifteen times what a typical Hillsborough house trades for. That is the asking price on 3000 Ralston Avenue, which went into contract in July and, if it closes anywhere near ask, becomes the biggest Bay Area home sale of 2026 and roughly doubles the record for a town of 11,000 people.
The buyer works in AI. Of course they do.
What is actually changing hands on Ralston Avenue
A 12,000-square-foot main house on 12 acres, built to evoke Lake Como. Per The San Francisco Standard, the amenity list runs to a sunken tennis court, a nine-hole golf course, an 18-hole putting green, a 150-seat amphitheater, reflecting pools, a koi pond, and a 2,100-gallon saltwater aquarium. The sellers are private-equity investor Ted Kruttschnitt and his wife Alexia.
It listed in fall 2025 at $88.8 million, took a $10 million cut, and found its buyer this month. The largest Bay Area sale of the year before this one was a $56 million off-market deal in Pacific Heights.
The amphitheater seats more people than most Peninsula planning commission hearings draw. I mention it because it is the clearest signal of what is being bought here, which is not really a house.
How Hillsborough actually prices against Atherton and Woodside
People collapse the mid-Peninsula estate towns into one bucket. Our own numbers say they are three different markets.
| Town | Median sale price, June 2026 | Houseberry city score | What the money buys |
|---|---|---|---|
| Hillsborough | $5.42M | 4.2 / 5 | Large lots, strong school and safety marks, almost nothing walkable |
| Atherton | $17.31M | 4.0 / 5 | Nearly all estate parcels, effectively no entry tier |
| Woodside | $4.22M | 3.9 / 5 | Acreage, trees, equestrian land, rural trade-offs |
Atherton's median is more than three times Hillsborough's, and Hillsborough still scores higher overall on our city scoring. That is not a contradiction. Atherton is small and almost entirely estate parcels, so nothing pulls its median down. Hillsborough has genuine range, from four-million-dollar houses on ordinary lots up to whatever 3000 Ralston records at. Woodside is cheaper than both, and its June median fell 6.1 percent from May, which tells you how thin the trading gets up there.
Hillsborough's score profile is worth naming too: 4.6 on schools, 4.3 on safety, 3.5 on amenities. It scores the way it lives. You do not walk anywhere. Ryan Tract tops our Hillsborough neighborhood rankings at 4.8, and the spread from top to bottom across the town is only eight tenths of a point, which is unusually tight.
What a record sale does and does not do to your comps
What it does: reset the ceiling. Sellers at the ten-million-and-up tier will hear this number within a week and a few of them will reprice. Appraisers get a new outlier to argue about. And it confirms the pattern brokers have described all year, which is AI-sector money buying large custom estates instead of trophy city penthouses.
What it does not do: move your house. A 12-acre parcel with its own golf course is a land-and-amenity trade, not a per-square-foot comp. If you own a $4 million Hillsborough house on a half acre, this sale tells you close to nothing about your value, and an agent who says otherwise is selling you a listing agreement.
It also has not closed. In contract at $78.8 million is not the same as recorded at $78.8 million, and on trophy property that gap is often wide.
Three questions that come up whenever a number like this lands
Does a record sale nearby raise my property taxes?
No. Under Proposition 13, your assessed value is based on what you paid, with increases capped at 2 percent a year, and it is reassessed when your property changes hands or you build. Your neighbor's sale reassesses your neighbor's parcel.
Is Hillsborough the most expensive town on the Peninsula?
By single-sale record, it is about to be. By median, no. Atherton's June 2026 median was $17.31 million against Hillsborough's $5.42 million. Those are two different measurements, and the median is the one that describes what buyers actually face.
Does this mean the luxury market is hot everywhere?
It means one 12-acre estate found one buyer. Woodside's median dropped month over month in the same period. Read the medians, not the headline.
The number worth waiting for
When the deed records in San Mateo County, the recorded price is the only figure that matters, and it may not be $78.8 million. Until then this is a very large asking price with a signature attached.
For everyone not shopping at that tier, the useful takeaway is smaller and more boring. The estate towns are not one market, their medians move independently of each other, and the score profile underneath them says more about daily life than any record sale does. That is the comparison we keep coming back to at Houseberry when someone asks which Peninsula town they should be looking at.
Sources
The San Francisco Standard, Peninsula sale could be the Bay's biggest deal
Houseberry, Hillsborough city guide
Houseberry, Atherton city guide