The average closing price for the 12-month period ending Jan. 10, 2019, according to data provided by Warburg Realty, was $2,155,297; the active-listings average, including apartments in the more expensive Waterline Square, was $3,339,619.

“This is a neighborhood in transition,” Ms. Gruenberger said, adding that, as elsewhere in the city, “there is a lot of price revision” downward.

Image 50 RIVERSIDE BOULEVARD, NO. 9N | A two-bedroom, two-and-a-half-bathroom condo with partial river views and a washer-dryer in a 2015 doorman building with a pool, a rock-climbing wall and a bowling alley, listed for $2.35 million. 917-783-2041 Credit... Tony Cenicola/The New York Times

Of 97 rentals on The New York Times site in early February, the lowest priced was $2,565 a month for a studio at 180 Riverside Boulevard, one of three all-rental buildings. The highest, at $55,000, was a five-bedroom, six-and-a-half-bathroom corner unit with a terrace at 50 Riverside Boulevard, a condo building.

The Vibe

Pier I Cafe, at the foot of a recreational pier that juts nearly 800 feet into the Hudson River at West 70th Street, is “a frequent gathering spot for people in the neighborhood,” said Dan Garodnick, president and chief executive of the Riverside Park Conservancy, which helps to take care of the park. He described it as “a New Yorker’s park,” partly because it is too out of the way for tourists and also because “people who live in the area are wildly committed to its upkeep.”

The conservancy offers 250 free programs a year, from May to October, as well as public art projects like Sarah E. Brook’s “Viewfinding,” at West 67th Street through Aug. 22, 2019. New sections of the park, which will extend it on the street level, are in the works, Mr. Garodnick said.

Spencer Sloan, 41, a resident of the neighborhood since 2010, with his wife, Alma, and two children, ages 7 and 8, has noticed “more action” on the boulevard, he said, including new schools, new medical offices and the first two restaurants: BLU Café, at 120 Riverside Boulevard, run by the BLU Realty Group next door but open to anyone; and Vin Sur Vingt, at 100 Riverside Boulevard, a wine bar that serves brunch on the weekends. Mr. Sloan said he is looking forward to the new Cipriani restaurant and food court scheduled to open this year in Waterline Square.