300B Fourth Ave 300B Fourth Ave, St. Catharines, ON is a rental apartment building with 1 floorplan available. It is located in the Western Hill neighborhood of St. Catharines. It has apartment amenities including central heat, dishwasher, balcony, walk-in closets, air conditioning, and on-site laundry. It has building amenities including fitness center, garage parking, controlled access, outdoor space, on-site laundry, and elevator.