Introducing an exceptional opportunity on one of the most coveted lanes in Water Mill South. Located south of the highway and set at the very end of a quiet cul-de-sac, 161 Summerfield Lane is ideally positioned just minutes from ocean beaches and a short distance to the beloved Milk Pail and Fairview Farm stands. Tucked away from main roads, Summerfield Lane has quietly evolved into one of the Hamptons' most exclusive enclaves, with its prestige affirmed by recent new construction and high-value land trades. The existing residence sits on an oversized 1.03 +/- acre parcel and enjoys rare privacy with unobstructed views across 19 acres of agricultural reserve - currently home to the iconic Topping Horse Farm and protected from future development. The home features four bedrooms, including two on the main level and two upstairs, one of which is the primary suite offering bucolic vistas. A sun-filled living room flows seamlessly into the dining area and adjoining kitchen, while the finished lower level offers a cozy sitting room and supplementary flexible space. Outdoors, a pool and detached two-car garage complete the current layout. In addition, the parcel can accommodate a north/south facing tennis court. Also available as a pre-construction offering. Inquire for details.