Great Northern is a Niagara-based home improvement company specializing in windows, doors, and siding. We have over two decades of experience providing unparalleled sales and installation services to our countless satisfied customers. To ensure that our installations exceed your expectations, we have meticulously hand-picked the very best manufacturers with which to form partnerships to complement our installations. Because of the exceptional quality of our materials and installation staff, we offer the best warranties in the industry on all products and services.
Great Northern’s dedicated, knowledgeable staff provide customers with personalized attention. We offer competitive prices and unprecedented service. Treating your home as if it were our own, our professional sales and installation teams will provide the information and guidance necessary to make informed decisions on home improvement, and will execute your renovations with courtesy, precision, and timeliness.