A Helen Frankenthaler painting casts a golden glow in the living room of an Upper East Side penthouse, where designer David Kleinberg installed custom seating around an Apparatus cocktail table. An Antony Gormley sculpture stands along the opposite wall, and a work by Philip Guston hangs between the windows, overlooking a custom sectional sofa grouped with an Hervé Van der Straeten tiered console and a swirling cocktail table by Maria Pergay. The vintage plaster ceiling lights are from Lerebours Antiques, and the rug is by Mitchell Denburg.

The terrace’s outdoor furniture is by Sutherland and upholstered in fabrics by Perennials and Jim Thompson; the landscaping was overseen by Hollander Design.

A ceramic sculpture by Steen Ipsen rests on the living room’s Apparatus table, which features a sandblasted Lucite base and a specially colored top.

In the entrance hall, Kleinberg collaborated with Orsman Design to create a ceiling lighting installation whose oval shape is mirrored in the limestone and marble-mosaic floor. A Mattia Bonetti console from David Gill Gallery stands opposite a Pat Steir canvas, and a Richard Artschwager painting of Marcel Breuer’s building for the Whitney Museum of American Art hangs in the opening to the hallway beyond.

A light fixture by Rosie Li hovers above a table custom made by Studio Van den Akker in the dining room, where mica paneling Kleinberg commissioned from Mary Kuzma Finishing sheathes the walls. Kuzma’s studio also made parchment doors for the Kleinberg-designed sideboard installed in the niche beneath Felix Agostini sconces from Donghia. The striped painting is by Morris Louis, and the rug is by Edward Fields.

In the family room, Kleinberg used the same Pollack fabric on the armchairs and the walls, which feature a nickel strapping detail that aligns with anigre-and-nickel bookcases; the painting above the custom sofa is by Kenneth Noland, the ceiling fixture is by Atelier Alain Ellouz, the sconces are Charles Paris designs from Donghia, and the rug is by Scott Group Studio.

An artwork by Adolph Gottlieb hangs in the husband’s cerused-oak-paneled office, which is furnished with a Kleinberg-designed desk topped in Edelman leather, a Jacques Jarrige lamp, an Eames desk chair, Vladimir Kagan armchairs, and a rug by Edward Fields.

The primary bedroom walls are clad in a Jim Thompson silk, while the upholstered bed, bench, and curtains were all made with Rogers & Goffigon fabrics. Holly Hunt sconces are mounted above the custom nightstands, and the glass-top table is attributed to FontanaArte.