On the walls of the New York loft of acclaimed design firm Søren Rose Studio are two photos: one of Steve McQueen—“understated and ever-cool”—and another of Keith Richards, the hard-partying, “rough and rugged gentleman.” These seeming opposites inspire the team to create original interiors that blend “Scandinavian poise” and “downtown grit.”

Those aspirations may have reached their zenith in this stunningly sleek 6,000-square-foot duplex penthouse, which overlooks the rarefied environs of Park Avenue from on high. The stylishly minimal interiors are filled with bespoke elements contributed by master craftsmen, designers, and artisans; the result is a unique blend of Nordic and industrial, an ambience that is at once rugged and refined. Ceilings are remarkably lofty, affording a sense of blissful airiness. Surfaces of stone, glass, leather, steel, and wood create a subtly sophisticated palette and a pervasive sense of serenity. Natural light floods in through impressive banks of floor-to-ceiling windows, which transform views of the city skyline and Gramercy Park into real-time art. Taking the luxury to further heights—if you’ll pardon the penthouse pun—are a rooftop pool and glass-enclosed entertaining pavilion practically unrivaled in Manhattan.

On the main level, the flow of the living spaces follows a gentle curve, gracefully bending from a grand salon with a fireplace to a formal dining area and culminating at the Arclinea-designed kitchen. The home’s hallmark is an unprecedented soaring wall of Verde Alpi marble, sourced from a renowned quarry in the Swiss Alps, which rises from the center of the entertaining spaces, through the mezzanine, and to the stylish rooftop pool pavilion. By its side is a striking glass-enclosed curvilinear stairway with floating oak treads, which connects the home’s three levels. Between the salon and the dining room, a whimsical porthole offers a peek below the surface of the swimming pool.

The kitchen area promises an openness and fluidity ideal for entertaining, while featuring clean modern lines and a host of desirable appointments, including a full complement of Gaggenau appliances. The remarkable 17-foot-long island is topped with cool, deep-gray Gra Bla marble—the installation of which required a special window to be created in the building.

Remarkable in its spaciousness, the master bedroom is a private oasis secluded from the living spaces on the main level. A custom nook for the bed—surrounded by richly hued oak cabinets with leather fittings—offers a perfect position for gazing out over the southern city skyline through yet more floor-to-ceiling windows. In the lavish en suite bath, Bisazza tile is used to dazzling effect, running along one full wall of a space that indulges with a dual-head glass-enclosed shower and a soaking tub cut from a single slab of statuary marble. Additional storage options are offered by another collection of custom-fitted closets. A study with handsome bookshelves is just outside the door of the suite.

One stylish bedroom with its own bath and plentiful closets is hidden on the main floor as well. A sanctuary on the mezzanine can easily function as an additional bedroom—a luxurious bath is steps away—or as a quiet, contemplative office. Its glass-paneled ceiling is the floor of the sun-soaked patio above, which allows the space to be suffused with lovely light throughout the day. Custom wood built-ins bring to mind the cabin of a luxurious yacht. An eye-catching wood and glass screen is retractable at the push of a button, affording either privacy or a discreet view of the living spaces below.

The waters of the home’s enviable 30-foot pool seem forever blue thanks to Mosaico Bisazza tile, and an infinity glass wall at one end allows for midswim appreciation of the Flatiron District. Sure to be the site of many a festive gathering, the glass-enclosed pavilion includes a full marble kitchen, ample space for lounging and dining, and a folding glass wall that erases the line between indoors and out. Heating and air conditioning allow for enjoyment year-round in any sort of weather. But the view is perhaps the home’s crowning achievement: full, breathtaking, panoramic, and capturing both the classic glamour and the edgy chic of the city.