66 Sumner Road is a private oasis in back-country Greenwich. This Mid-Century Modern treasure constructed by global architectural firm Spector Group with interiors by John Saladino, one of the world's most distinguished and respected interior designers. Offering 4-bdrms, 5.5 bths, and 5.5K SF of living space featuring open spaces w/ floor-to-ceiling windows that bring the bucolic outdoors in. Nestled at the end of a cul-de-sac off Round Hill Rd, this 4+ acre property has a private auto-gate, tennis court, pool and beautiful specimen trees. The property is surrounded by a buffer of wetlands for utmost privacy and is completely fenced. Pool bath and changing rooms. Brand new siding and decking. Unique opportunity to own an architectural masterpiece not previously offered to the market.