What is “sexy”?

“No one sees anything,” Steinberg says.

At 443 Greenwich, a sensor grants entry to the gated, 24/7-monitored garage, where residents can be discreetly dropped off in a lower-level lobby and never be seen by either paparazzi or passers-by.

“That’s the ultimate privacy,” says Mitchell Wasser, the director of marketing and sales at MetroLoft, which developed the building. (Wasser declined to comment on buyers.)

Locations in low-key neighborhoods also help — specifically those separated from Manhattan’s tourist crush in areas such as Midtown. Take 200 11th Ave., where Nicole Kidman resides, which is on a quiet West Chelsea block. In-house amenities, such as a gym, mean celebs can work out without ever going outside.

Despite precautionary measures, cameras don’t always shy away from celeb addresses. At Tribeca’s 155 Franklin St., Orlando Bloom sold his three-bedroom for $5.6 million in 2015 because neighbor Taylor Swift turned the place into a paparazzi zoo. Shutterbugs also gathered outside 200 11th Ave. following the 2014 suicide of longtime Mick Jagger girlfriend, L’Wren Scott, who lived — and died —
in unit 9S.

Before this wave of fame-filled developments, other buildings stole the spotlight. Starchitect Richard Meier’s 2002-constructed 173 and 176 Perry St. not only set a precedent for design-driven residences, but also saw Martha Stewart and Nicole Kidman buy homes there over the course of several years. (A third tower at 165 Charles St., which lured Natalie Portman, followed in 2004.)

Before that, NYPD headquarters at 240 Centre St. were converted into apartments in 1988. The Police Building became the sole true white-glove address in Lower Manhattan, and lured models Cindy Crawford, Christy Turlington and Linda Evangelista.

Uptown, the San Remo’s lenient board made it popular for figures including Dustin Hoffman, Demi Moore and Glenn Close, but famously turned away Madonna in July 1985, the same month she appeared nude in Playboy.