PKSB Architects The original and final proposals for a rooftop addition to the Puck Building.

The Landmarks Preservation Commission finally approved a rooftop addition to the Puck Building today, concluding a four-month process that resulted in numerous rejections of numerous designs.

The owner of the landmarked building at Lafayette and East Houston Streets, Jared Kushner, expressed his pleasure with the outcome, which only came after four other designs were rejected by the commission.

Michael Natale Puck.

“I am very pleased with the results. We got an extension approved that allows us to go forward with a special project,” said Mr. Kushner, who owns the New York Observer. “The additions to the building will further enhance one of the most iconic buildings in the world.”

Elisabeth de Bourbon, a spokeswoman for the commission, said that the latest design would not amount to a drastic change to the Puck Building.

Commissioner Michael Devonshire, an architectural conservator, said, “They’ve reached the target of minimalism in terms of massing.”

The commission approved the plans unanimously, 9-0, noting that the fifth and final incarnation of the penthouse would not be nearly as visible from the street as previous versions, which were rejected for being too ostentatious. Commissioners also lauded Mr. Kushner for agreeing to undertake restorative work on the building.

Andrew Berman, the executive director of the Greenwich Village Society for Historic Preservation, praised the lengthy approval process, but still expressed skepticism about the penthouse plan.

“Only time will tell if the final, scaled–back version approved by Landmarks today is truly worthy of this great New York landmark,” Mr. Berman said.