About Custom Built Windows Inc


Custom Built Windows Inc has been providing top-quality window and exterior home improvement products to Chicago area residents since 1940. Founded by Gary Gillis's father and now owned by Gary himself, we pride ourselves on our long-standing tradition of excellence and commitment to customer satisfaction.

As a fully insured and A+ accredited member of the Better Business Bureau, Custom Built Windows Inc offers a wide range of products, including wood windows, replacement windows, vinyl siding, soffit and fascia, gutters, patio doors, exterior doors, and shutters. What sets us apart is our focus on energy efficiency – our windows feature the most energy-efficient glass in the industry, helping homeowners reduce energy costs while enhancing the beauty and value of their homes.

One of the key advantages of working with Custom Built Windows Inc is the personalized shop-at-home service provided by Gary Gillis himself. By dealing directly with the owner, you can expect a level of attention to detail and customer service that is unmatched in the industry. Whether you're looking to replace your existing windows or upgrade your home's exterior, Custom Built Windows Inc is ready to assist you with top-quality, energy-efficient products that will exceed your expectations.


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