Replacement windows in St. Louis,
measured for your home.
Windows, entry and patio doors, siding, and glass repair across St. Louis. Brand-name products installed by our own crews, most jobs done in one to two days. It starts with a free in-home estimate.
Family-owned since 1953 · our own crews · limited lifetime warranty
70+
years family-owned, since 19530
subcontractors, our own crews onlyFree
in-home estimates, no pressureShopping a big franchise window quote? Get our number too.
Plenty of our customers call us right after a Renewal by Andersen presentation. Put the two quotes side by side: the difference is often close to half.
The same brand family
We install Andersen windows, alongside Wincore, Silver Line, Atrium, and Quaker. Compare the lines for yourself on Andersen's own site.
See Andersen's full lineWarehouse pricing
We are a discount warehouse for windows and doors, and have been since 1953. Our price covers the window and the install, not a national ad budget or a commissioned sales system.
No pressure, no countdown
Your estimate is free, in your home, and still good next week. Take your time and compare. Our own crews install, backed by a limited lifetime warranty.
Every window style we install, set out plate by plate.
Six core styles. Not sure which the opening calls for? A free in-home estimate sorts it out.
The whole exterior, from one St. Louis shop.
From first call to final walkthrough.
No mystery and no pressure. Here is exactly how a window job runs with us, start to finish.
- 01
Free in-home estimate
We come measure your windows in your home and give you a straight quote. No pressure, no obligation.
- 02
Choose your windows
We help you pick the right style and brand-name line for each opening, and put the price in writing.
- 03
Our crew installs
Our own installers do the work, never subcontractors, and keep your home clean inside and out.
- 04
Backed by warranty
A final walkthrough and a limited lifetime warranty, from a family-owned company since 1953.
The kind of word that travels in St. Louis.
4.1 on Google
207 reviews
“From start to finish, the experience with Penny Window was fantastic! The price was perfect, and the service exceeded expectations. Huge thanks to Tim and Dave for their amazing work on installing our windows.”
Sam Reading
Google review
“We just had 20 Andersen windows installed by these folks. They did AWESOME! All done in 3 days! The install looks amazing. Better yet, they were super clean; they spread covers inside and out.”
Greg Rybacki
Google review
“Tim our installer was here one hour ahead of time. He was very professional and cleaned up afterwards. We love the quality and look of the windows.”
Celestine Dunn
Google review
“Good quality windows for a great price! I have been using their windows for 30 years.”
Michael Haiducek
Google review
“My personal experience with Penny Window has honestly been excellent. They do amazing work, great price and good communication.”
Justin Veal Briscoe
Google review
“The best window shop in St. Louis. By far.”
Jon ron
Google review
Serving 15 communities across the metro.
From the city and inner county out through West County and across the river into St. Charles, if you’re in the metro we’re close by.
No pressure, no obligation
Ready for a free estimate?
A free in-home estimate from a family-owned St. Louis window company handling window replacement since 1953. When you compare local window replacement companies, ask who does the install: with us it is always our own crews, a straight price, and a limited lifetime warranty.