Top Notch Building Supply is located just 1/4 mile north of Illinois Highway Rt. 20 on Pecatonica Road. We service a large area including Rockford, Belvidere, Freeport, Byron, Rockton and Lake Summerset. We work closely with homeowners to find the right product and design that they are looking for. Our sales team has great relationship built with many area contractors and we enjoy doing business with them. Whether you are inquiring information on a product or looking for a contractor to do the work, we can answer your questions and are eager to help.