Hillsborough's most recognizable piece of real estate has hit the market.
The home at 45 Berryessa Way, though relatively small by the town's standards at 2,730 square feet, is seeking a big price tag of $4.2 million.
Visible from Interstate Highway 280, the 39-year-old three bedroom, two bathroom house is striking for its amorphous dome shapes, made of wire and shotcrete.
"Everyone knows the building driving on 280, but when they come inside, they're in awe," listing agent Judy Meuschke said.
Zillow — and lots of people — colloquially call it the "Flintstones house." In the 80s, it was also known as the "Barbapapa house," after a set of children's books that was more popular in Europe, though their cartoon shorts briefly aired in the Bay Area at the time.
According to Redfin, the last sold price was $800,000 in 1996.
Look Inside 'Flintstones' House in Hillsborough
Meuschke gave NBC Bay Area an exclusive tour of the home — through the brightly-hued conversation pit and into the quirky kitchen.
"We felt that's a pretty good price for a landmark," Meuschke said of the $4.2 million asking price.
Meuschke says the homeowner, who wanted to remain private, is simply "moving on" after 19 years.
"You can see by her artwork and her furnishings and the things she collected that she loved this place," she said.
Meuschke is showing the home by appointment only and doesn’t plan on hosting any open house events.