Bathed in southern light, this exceptional 7-room duplex condominium located in the heart of the Upper East Side is a rare combination of scale, elegance, and outdoor living. The residence features four bedrooms and three-and-a-half bathrooms across approximately 3,400 interior square feet, complemented by over 1,280 square feet of private outdoor space spread across two levels. Designed by the celebrated architectural team, Jacques Grange and Barry Rice, the maisonette at 40 East 72nd Street reflects meticulous craftsmanship and a thoughtful balance of timeless sophistication and modern luxury. Expansive windows and terrace doors invite sunlight throughout the day, highlighting soaring ceilings over 9 feet high and a dramatic 30-foot great room ideal for both everyday living and entertaining. The main level flows effortlessly from an open living room to a formal dining space and an eat-in chef's kitchen. A gracious entry gallery with powder room sets an elegant tone, while a spectacular 44-foot terrace spans the upper level, overlooking the landscaped garden below. On the lower level, a flexible den or media room-also suitable as a fourth bedroom-opens directly to a lush 45' x 20' private garden. The home is finished with a refined blend of classic prewar detailing and contemporary upgrades. Brand-new hardwood floors, decorative ceilings, crown moldings, and pocket doors add architectural charm, while modern conveniences include central air conditioning, custom lighting, a dedicated laundry room, and abundant custom storage throughout. The kitchen is both striking and highly functional, outfitted with premium appliances including Gaggenau double wall ovens, a five-burner cooktop and dishwasher, a Sub-Zero refrigerator and wine fridge, and Franke fixtures. Custom cabinetry is paired with quartzite countertops and backsplash, and a sunlit breakfast area completes the space. Private living quarters are thoughtfully separated from the entertaining areas. Three spacious, quiet bedrooms are located on the lower level, with an additional bedroom on the upper floor. Three bedrooms feature en-suite bathrooms and custom closets. The expansive primary suite offers two fitted closets-including a generous walk-in-and a spa-like bathroom with marble walls, an Italian marble vanity, Waterworks soaking tub, glass-enclosed shower, radiant heated herringbone marble floors, and direct access to the south-facing private garden. Located at 40 East 72nd Street, this intimate boutique condominium was originally designed in 1928 by Schwartz & Gross and exquisitely reimagined in 2014 by renowned designers Jacques Grange and Barry Rice. The transformation preserved the elegance and proportions of prewar architecture while introducing modern infrastructure and refined interiors. The building offers a 24-hour doorman, dedicated basement storage for each residence, and allows pets with board approval. With just seven residences across five floors, this is a rare opportunity to enjoy privacy, prestige, and timeless design in one of Manhattan's most desirable neighborhoods.