Though they bought it barely two years ago, public records confirm social media superstars Ethan and Grayson Dolan have unexpectedly sold their sublime midcentury modern house for nearly $3 million. That’s a big step above the $2.2 million the now-retired YouTubers paid for the Encino property in 2019; per the listing, the house “sold before processing,” meaning a buyer swooped in before the place even had a chance to officially hit the market. Records reveal the new owner is a local woman who’s clearly quite rich but not famous.

While they raked in an $800,000 profit on paper, the Dolans also made extensive renovations to the home, a single-level structure originally built in 1958 by little-known architect John P. Pedersen. Back when they bought the place, the decor was inoffensively bland to the point of banality, with white walls and gray tones throughout. The twins remedied that by adding spicy pops of color...