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Custom Built Windows Gary Gillis is the owner of Custom Built Windows, Inc which his father established in 1940. Custom Built Windows, Inc. is a fully insured, A+ accredited member of the Better Business Bureau! Custom Built sells wood windows, replacement windows, vinyl siding, soffit & fascia, gutters, patio doors, exterior doors, and shutters. Working in the Chicago area suburbs, we have the highest quality wood and custom-made replacement windows with the most energy efficient glass in the industry. We are ready to assist you with energy efficient products that will enhance the beauty and value of your home.
Services
SolarClean Self-Cleaning Glass is a permanent layer that is part of the outer glass surface. The sun's ultraviolet rays break down dirt and the rain washes it away. No spotting or streaking. Simulated Divided Lites give you thermally-efficient insulating glass without sacrificing architectural beauty.
Double Hung and Single Hung windows tilt in for easy cleaning. Never again do you need to drag out the ladder and spend all day cleaning windows from the outside. Single Hung windows offer the bottom sash operational with the top sash stationary or fixed. Double Hungs offer top and bottom sashes that are fully operational.
If you ever wanted to dramatically change the appearance of your room, a bay window is for you! Bay windows feature a large picture in the center with your choice of casements or double hung windows on the sides. Bay windows feature a large spacious seat. The casements, bays, bows, picture windows and patio doors we carry, exclusively have lift and tilt sun blinds or pleated shades as an option in between a sealed glass unit. Available in many colors.
The casements we carry are designed with three continuous seals of weather stripping around the windows perimeter, you won't feel any air leaking into your home. Our stylish hardware allows all casement windows to open to a full 90-degree angle, so you can clean the outside pane of glass from the inside of your home.
Reviews (3)
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Carey Smolensky
Oct 14, 2021
I have used Custom Built Windows, Inc. three times in the past 20 years. Twice Gary and his team replaced windows and doors in two of our homes and replaced the roof and windows in my parent's house as well. I highly recommend this company for their professionalism, responsiveness, dependability, fair pricing, and quality work. Services: General door installation, Window installation, Window repair
Beatriz Vazquez
Sep 22, 2021
Critical: Professionalism I called to ask for a custome made window, the person answering was very rude, and just hanged the phone.
Rob Watson
Nov 27, 2019
Custom Built Windows, Inc. did a great job! Our original windows and doors were put in by the home builders and were already drafty and accumulating condensation only 8 years later when we happened to move in. We contacted Gary and he came right over, made an assessment, and then recommended energy efficient windows that were affordable for our budget.

The team was professional, quick, and efficient and cleaned up after themselves as they worked. Our windows made our energy bill drop and our all-season comfort level rise. I highly recommend Custom Built Windows, Inc.