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 dishwasher, assigned parking, on-site laundry, oven, microwave, air conditioning, and in-unit laundry. It has building amenities including storage, and on-site laundry. Dogs are allowed, making it a pet-friendly building.