Big Ticket | For $26.6 Million, a Penthouse in SoHo With a Lawn on the Terrace

A SoHo artist’s studio that underwent a radical transformation from an airy but spartan loft to a sybaritic 7,200-square-foot luxury penthouse sold for $26,580,000 and was the most expensive sale of the week, according to city records.

As a bonus, the penthouse’s sprawling rooftop terrace has an authentic water tower augmented by an outdoor kitchen, a Boffi shower, Balinese stone walls, a covered patio with video and audio, and a synthetic lawn with an oversize hammock. Monthly maintenance is $5,223.

The five-bedroom, five-and-a-half-bath penthouse, a.k.a. No. 6W, at 383 West Broadway between Spring and Broome Streets, had an asking price of $32 million, which, if paid, would have set a record for a downtown co-op. Rupert Murdoch’s former co-op at 141 Prince Street retains the record, $27.5 million.

The seller, the minimalist sculptor and earthworks artist Charles Ross, joined other artist-pioneers to buy the entire block-through building in 1973. He installed his studio on the top floor and rented out the small apartment on the Wooster Street side of the building. But in 2006, his friend Damion Berger, a British fine arts photographer and real estate entrepreneur, convinced him that the space was underutilized. In 2010, Mr. Ross downsized to the Wooster Street apartment and a gut renovation masterminded by Mr. Berger commenced, turning the space into what Mr. Berger described as “a bespoke family residence.”

The penthouse has a Bulthaup kitchen with Carrara marble countertops and Gaggenau appliances, and a marble-and-white-onyx master bath with an octagonal skylight and a free-standing cast-stone soaking tub. The “spa bath” has a steam shower for six. The wine cellar off the kitchen has a built-in humidor. There is a home theater and, in the great room, a walnut-and-steel Ping-Pong table.

Adam Modlin of the Modlin Group and Leonard Steinberg of Douglas Elliman handled the listing for the sellers, Mr. Ross and Chupinas Moon, a limited partnership. Trisha Riedel, also of Elliman, negotiated for the buyer, a limited liability company, 398 PH.

The runner-up, selling for $21,892,375, was a pristine 11-room Upper East Side duplex penthouse with two terraces at 135 East 79th Street, PH15E. James Lansill of the Corcoran Sunshine Marketing Group represented the sponsor, the Brodsky Organization, and Laurance Kaiser, the president of Key-Ventures, brought the anonymous buyers, Penthouse MOT. Monthly carrying costs are $15,550.

Big Ticket includes closed sales from the previous week, ending Wednesday.

A version of this article appears in print on 05/04/2014, on page RE2 of the NewYork edition with the headline: Water Tower Included.