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Window Replacement St. Louis, MO

Window installation in St. Louis, MO

Gallagher Bros Construction in St. Louis, MO, is proud to be recognized as one of the top window replacement St. Louis companies. Not only will your house or business gain tremendous energy efficiency, but replacement windows will also dramatically improve the appearance and value of your property.

Our process begins with a FREE in-home consultation. Gallagher Bros Construction has access to almost all the major window manufacturers, so there are many options to choose from. Best of all, we stand behind our products and installations with one of the strongest warranties in the local window replacement business.

Window replacement St. Louis

For over 50 years, Gallagher Bros Construction has been trusted with window replacement by thousands of people who live in St. Louis and surrounding communities. Above all, our reputation and your complete satisfaction regarding your window installation project are most important to us. We encourage you to check out our 5-star reviews on online platforms like Google, Facebook, Yelp, the BBB, and more.

Just click on the “Get Quote” button on this page, and let’s get started today.

Replacement Windows

Searching for new windows?

  • Bay windows
  • Slider windows
  • Double hung
  • Bow
  • Casement

Window Replacement Experts in St. Louis

Frequently Asked Questions

Gallagher Bros Construction is a family-owned roofing and exterior contractor founded in 1973, serving the St. Louis metro area for over 50 years.

Yes. Every project is backed by a 5-year workmanship warranty, in addition to applicable manufacturer material warranties.

Yes. As a full-service storm restoration contractor, we assess the damage, document it, and coordinate directly with your insurance company to streamline the claims process.

We serve St. Louis County, St. Charles County, and Metro East Illinois, with an additional service area in Springfield, MO.

Yes. Gallagher Bros Construction is licensed and insured in both Missouri and Illinois. A certificate of insurance is available on request.