Dramatic Flatiron / Chelsea Penthouse Duplex with Private Roof Deck and Empire State Views Perched atop a twenty-four unit prewar cooperative, Penthouse 12A is a dramatic two-to-three bedroom, two bathroom duplex offering three levels of distinct, light-filled living space- capped by a glass-enclosed solarium and a spectacular six hundred plus square foot private roof terrace with panoramic skyline and Empire State Building views. The entry reveals a dramatic, creative home filled with abundant natural light thanks to expansive windows and open city views. The open kitchen features stone flooring, a vented four-burner gas range with oven, Sub-Zero refrigerator, Bosch dishwasher, and a playful mix of white and blue cabinetry accented by a classic white-tile backsplash and a dining peninsula perfect for elaborate home cooking and entertaining. The living and dining area boasts soaring twelve foot ceilings - easily accommodating both a large dining table and generous seating area. Accessible to the kitchen for wonderful flow and communication. A custom wood-and-glass sliding partition defines the adjoining den or third bedroom- maintaining the open, airy feel while providing flexibility based on one's bedroom requirements. The primary suite offers a serene retreat with a wall of bespoke cabinetry and a rolling ladder by Putnam Ladder Company providing access to upper storage. Oversized windows and thoughtful lighting create a calm, gallery-like atmosphere. The primary bathroom, located just across the hall, features a dual vanity, steam shower, soaking tub, and a frosted-glass pocket door that continues the home's modern aesthetic. A skylit spiral staircase connects the levels, flooding the home with natural light and adding a sculptural element to the space. The upper-level functions beautifully as a private guest suite or secondary primary, complete with a walk-in closet, en-suite bathroom with stall shower, and concealed GE washer/dryer. A raised platform along the window line provides additional lounge space and expands the room to create a decadent private suite. At the top, a rare glass-enclosed solarium offers a sun-drenched reading nook or indoor garden, leading directly to the expansive private roof terrace- where open skies and skyline views both north and south frame a quintessential downtown backdrop. The home's mid-block positioning and surrounding low-rise architecture preserve these views year-round. Additional features include a keyed elevator to a semi-private landing shared with only one other residence, video intercom system, built-in storage throughout, ceiling fans, recessed lighting; up to eighty percent financing is available. Pets are welcome. There is alsoa part-time superintendent.Forty West Seventeenth Street is an authentic 1920s New York loft building- reimagined for modern living with only twenty-four units positioned over the beloved bookshop Books of Wonder.