Welcome to 51 Sir Williams Lane, a rare and exceptional opportunity in the prestigious Princess Anne Manor. This oversized corner lot, which expands from 77.31 to 100.13 feet wide and 121.17 to 145.78 feet deep, has been fully rezoned with approved permits for a stunning new build offering over 5,500 square feet above grade. The property currently features a well-maintained four-level side split with four bedrooms, three bathrooms, and an inground pool, all situated on a sunny lot with desirable west, south, and east exposures. Whether you choose to move in, renovate, or build your dream home, the possibilities are truly endless. Located on the perimeter of Thorncrest Village, this home is set within an excellent school district and is just around the corner from Princess Margaret Park and St. Georges Golf & Country Club. This is a rare chance to create something spectacular in one of Torontos most sought-after neighbourhoods.