At Excel Windows, we take pride in the fact that we’ve been the preferred choice for quality home improvement with exceptional customer service throughout Chicago and the suburbs for nearly 40 years. Family owned and operated since 1977, our dedication to serving our valued customers landed our company an A+ rating with the Better Business Bureau and multiple service awards. Excel Windows does not stop at the point of sale, or even the point of installation. We want to make sure that you’re happy with your replacement windows, entry/storm doors, siding and bathroom remodel for years to come.