Welcome to 599 Longchamps Drive, a one-of-a-kind architectural masterpiece nestled in the heart of the Main Line, within coveted Radnor Township. Your heart is captured from the moment you see the breathtaking cupola with its custom weather vane, and pitched slate roof, accented by copper gutters--a trio of timeless details that set the tone for the beauty that lies within. Originally the carriage house for the famed D'Orsay estate, this enchanting residence was completely transformed by its current owners in 1995, beginning with a stone foundation and terra cotta block under the stucco. Every inch of this picture-perfect gem has been curated with the finest quality and craftsmanship, all while preserving the timeless charm and soul of its historic roots. Perfectly sited on a stunning 1-acre lot, from the moment you arrive, you'll feel as though you've been transported to the South of France. Upon opening the front door, an air of sophisticated elegance abounds as gleaming walnut floors welcome you into the two-story Foyer. Featuring a custom walnut staircase, intricate millwork, and detailed crown moldings, the Foyer introduces the elevated design and seamless, natural circular flow that continues throughout the First Floor. The elegant Living Room, anchored by a stunning fireplace flanked by custom display cabinetry, exudes warmth and refinement, while a private Office offers a quiet retreat. The inviting Family Room is a sunlit sanctuary, featuring bay casement windows and elongated elliptical French doors that open to a slate Patio framed by manicured boxwood gardens--creating the perfect balance of beauty, privacy, and indoor-outdoor living. At the heart of the home lies a European-inspired gourmet Kitchen, complete with high-end appliances, marble countertops, and views into the Dining Room, overlooking a gas fireplace and picturesque ivy-covered brick courtyard. The Dining Area opens directly to this private courtyard--perfect for seamless entertaining and al fresco dining in a truly enchanting setting. A convenient first-floor Laundry/Mudroom and an attached two-car Garage add to the home's effortless livability. Ascend the sweeping staircase in the Foyer to find an exquisite Primary Suite, where elegance and serenity converge. The suite features a tray ceiling, its own fireplace, and a unique architectural view into the home's cupola. French doors lead to a private balcony overlooking the lush, flat backyard. The suite also includes his and her walk-in closets and a luxurious en-suite Bath featuring limestone floors and marble countertops. Three additional Bedrooms--each with unique dormers and charming window seats--share an updated Hall Bath, offering warmth, character, and comfort for family or guests. An unfinished Lower Level provides abundant storage space, with the exciting potential to finish and expand the home's living area to suit your needs and lifestyle. Outside, the backyard is a private haven, featuring a spectacular Patio framed by mature landscaping--ideal for hosting, relaxing, and making cherished memories. This is more than a home; it is a rare and remarkable lifestyle opportunity. Come experience the magic of 599 Longchamps Drive--where Old World charm meets modern elegance in the sought after D'Orsay neighborhood. SHOWINGS BEGIN THURSDAY APRIL 3rd