The British developer Christian P. Candy finally sold his triplex atop the Plaza Hotel — four years after first putting the lavish penthouse on the market.

The price for the apartment, on Fifth Avenue and Central Park South, was $32.7 million, which was far below the $59 million initially sought. But it was still one of the priciest closed sales in October, according to city property records.

Last month’s most expensive sale, also with a significant price reduction, was a few blocks away, at 432 Park Avenue, the supertall luxury tower between East 56th and 57th Streets. An apartment on the 80th floor of this 96-story building was sold to an unknown buyer for $39.3 million. The most recent asking price was $44.25 million.

The sponsor unit has four bedrooms, five full baths and two powder rooms over 5,421 square feet, according to a listing with Douglas Elliman Real Estate. The monthly carrying costs total $21,079.

In other notable transactions, the pop star Taylor Swift appears to have closed on a townhouse in TriBeCa. The Central Park South co-op that the Italian tenor Luciano Pavarotti had long used as a pied-à-terre was sold privately. Jonathan Newhouse, the chief executive of the media giant Condé Nast International, sold a penthouse in Kips Bay.

Donald Trump Jr.’s mother-in-law, Bonnie Haydon, bought an Upper East Side apartment. And Melissa Errico, an actress and singer, and her husband, Patrick McEnroe, a tennis commentator for ESPN, sold their Greenwich Village co-op.

Also, Amy Poehler became the full owner of the West Village apartment that she once shared with her former husband and fellow comedian, Will Arnett.

THE PLAZA PENTHOUSE, which encompasses the 19th through 21st floors and offers sweeping Central Park and cityscape vistas, was sold to Mr. Candy in early 2012 for nearly $26 million. But he wasn’t the first to lay claim to it. While the Plaza Hotel was undergoing a partial condominium conversion in early 2007, Andrey Vavilov, a Russian financier, signed a contract to acquire this penthouse, and another, for a total of $53.5 million. He later backed out of the deal, saying that the finished apartments resembled “glorified attic space.” He sued the developer, the Elad Group, over fraud and breach of contract claims; Elad countersued. A settlement was reached in January 2009.

Mr. Candy, who with his older brother, Nick, develops luxury properties — most notably One Hyde Park in Central London — went through with his closing, but he never moved in. He put the unit back on the market months later, for $59 million, after extensive renovations and adding custom furnishings. With no takers, the apartment was eventually reduced to $39.75 million; its monthly carrying charges are $17,736. The buyer was identified as Luxury Team Inc.

According to the most recent listing with Sotheby’s International Realty, this 6,316-square-foot triplex has four bedrooms and five and a half baths. The master suite takes up the entire top floor; it has a terrace that faces the park, a sitting area, walk-in closets and a dressing room, and two marble baths. Three en-suite bedrooms are on the 19th floor, while the entertaining space, which includes a den and an eat-in kitchen, is at the middle level. Elizabeth Sample and Brenda Powers of Sotheby’s were the listing brokers.

THE TOWNHOUSE THAT MS. SWIFT likely purchased was No. 153 on Franklin Street, a cobblestone road. The 27-foot wide, three-story brick townhouse sold for $18 million. The private purchase, according to property records, was made through the limited liability company Euro TriBeCa; that firm has a Nashville address linked to Ms. Swift’s management company, 13 Management.

Tree Paine, a spokeswoman for the singer, did not respond to requests for comment.

The house was fully renovated under the direction of the designer Leopoldo Rosati. It has 5,148 square feet, with four bedrooms and four and a half baths. The home had been in the spotlight about six years ago when it was rented to Dominique Strauss-Kahn, the former head of the International Monetary Fund. Mr. Strauss-Kahn had been under house arrest there, accused of assaulting a housekeeper at a New York hotel. (Those charges were later dropped.)

Ms. Swift, whose latest album “Reputation” is due out this month, also owns a penthouse in TriBeCa, at 155 Franklin, and she had been renting a townhouse in the West Village, at 23 Cornelia Street. That property is now for sale, for just under $20 million.

THE PAVAROTTI PIED-À-TERRE, at the Hampton House, at 150 Central Park South, between Seventh Avenue and Avenue of the Americas, was sold for $9 million. The buyer was Alva Craft, an actress and singer, who was the wife of Robert Craft, an orchestral conductor who died two years ago.

The apartment, unit No. 2301, was first listed for sale in 2014, seven years after Mr. Pavarotti’s death. The price was $13.7 million. It was taken off the market and re-listed in early 2016 for $10.5 million, then later that year offered briefly as a potential combination with a smaller, neighboring apartment, No. 2302, for a total of $20.5 million. Last month’s sale was without a broker.

Mr. Pavarotti had purchased this 2,000-square-foot apartment, with two bedrooms and two baths, more than 30 years ago. His wife said he was drawn, in part, to the apartment’s proximity to the Metropolitan Opera House. It is also close to Carnegie Hall.

THE PENTHOUSE SOLD BY MR. NEWHOUSE is at 105 East 29th Street, a co-op building near Park Avenue South. It closed at $6.8 million, which was not far from the asking price.

According to the listing with Douglas Elliman, the full-floor, loft-like unit measures about 3,400 square feet and has three bedrooms and three and a half baths, with high ceilings and oversize windows. An antique iron staircase leads to a glass-enclosed room and a 1,400-square-foot roof terrace.

Mr. Newhouse was a cousin of S.I. Newhouse Jr., who controlled Condé Nast’s parent company, Advance Publications, and died in early October.

Across town, Ms. Haydon, who ran the Kay Models agency and is the mother of Vanessa Haydon Trump, paid $6.4 million for unit No. 14A and a storage room at 1049 Fifth Avenue, a prewar condominium near 86th Street and facing Central Park.

This 2,458-square-foot apartment has three bedrooms and three and a half baths, along with two wraparound terraces totaling 705 square feet, according to the Douglas Elliman listing.

In Greenwich Village, Ms. Errico, who has starred in several Broadway shows, and Mr. McEnroe, who is a brother of the tennis champion John McEnroe, sold their five-bedroom, four-and-a-half-bath duplex at 250 Mercer Street for $5.2 million. The 3,883-square-foot apartment also came with a storage unit.

And in the West Village, Ms. Poehler paid $6.5 million to Mr. Arnett, from whom she is divorced, for their eighth-floor apartment at 1 Morton Square. The 2,446-square-foot unit has three bedrooms and three baths. They had purchased the home in 2007 for $5.28 million.