There is a house on East 71st Street that New York has never quite known what to do with. The Bubble House — a low-slung modernist row house wedged into a block of Upper East Side brownstones like a hubcap in a silverware drawer — has spent decades stopping pedestrians mid-stride. The oval windows do most of the work. They bulge from the facade in a way that is either visionary or deeply unsettling, depending on which side of the street you are standing on.

According to a report by Curbed, the property has now found a buyer. The less reassuring detail: the new owner is not certain the windows are staying. What happens to the oval portholes is, at this point, an open question with no public answer attached to it.

The house has functioned for years as one of those only-in-New-York properties that real estate listings describe as “unique” when they mean “genuinely strange.” It attracts the kind of foot traffic that brownstone neighbors typically do not — architecture students, design bloggers, people who simply cannot reconcile its existence with the surrounding streetscape.

No renovation timeline has been confirmed, and the sale price has not been disclosed. Whether the Bubble House emerges from new ownership looking roughly as it does today, or considerably more conventional, will not be known until permits — or a plain new facade — appear on East 71st Street.