20 Winchester St 20 Winchester St, Brookline, MA is a rental apartment building with 1 floorplan available. It is located in the Washington Square neighborhood of Brookline. It has apartment amenities including assigned parking, oven, dishwasher, air conditioning, in-unit laundry, microwave, and on-site laundry. It has building amenities including on-site laundry, and storage. Dogs are allowed, making it a pet-friendly building.