Sweeping East River and Midtown Manhattan views fill a nearly 30-foot-long expansion in the living room of this penthouse-level apartment at 2 Northside Piers. With airy floor-to-ceiling windows and a cozy den, the three-bedroom, 3.5-bathroom unit has space and flexibility rarely found in a luxury condominium.

The condo is actually a combination of two apartments, with a primary bedroom suite that can double as an in-law apartment complete with its own entrance and kitchen. A proposed alternate floor plan shows how the layout can be customized upon purchase.

Either way, the unique footprint offers plenty of room and storage, including three walk-in closets. The tucked-away den allows privacy suitable for a home office or media room.

The waterfront-facing great room makes an incredible entertaining space, with room for lounging and dining for small and large groups.

Open to the space, the galley kitchen features minimalist cabinets in black and white lacquer. Beautiful honed Italian marble slabs make up the counters and a wall. Appliances are from Sub-Zero and Bosch.

In the bathrooms, marble clads sinks, deep soaking tubs and a walk-in shower, and there are also fixtures from Duravit. There are six closets in total, plus a laundry closet with a vented washer and dryer.

Other features include custom electronic window coverings and central air.

Located on the vibrant Williamsburg waterfront steps from the East River ferry dock and a short walk from Bushwick Inlet Park and Domino Park, the full-service building is known for its location, quality and coveted amenities. The latter include a pool, parking garage, doorman, concierge, hot tub, sauna, gym, lounge, outdoor deck, playroom for kids and bicycle storage.

A tax abatement runs until 2036; monthly fees are low. This one-of-a-kind property needs to be seen to fully appreciate the expansive space and views. An open house is set for Sunday, September 25 from 12:30 to 2 pm

Listed by Cory Kantin, Riana L. Bodine and Amar Jehs of Corcoran, the apartment is asking $3,495 million.

[Listing: 2 Northside Piers, 29NY | Broker: Corcoran] GMAP