Replacement windows in St. Louis.
Old windows fog up, stick, and leak heat. New ones change how a house feels and what it costs to heat and cool. We measure, quote, and install replacement windows the right way, with our own crews, not subcontractors.
Windows that pay you back.
We have been handling window replacement for St. Louis homeowners since 1953, and most installs are finished in one to two days. We start with a free in-home estimate, help you choose the right brand and style for your house and budget, and send our own crews to install it. One customer had 20 Andersen windows installed in three days, and they kept the job clean inside and out the whole time.
Free in-home estimates
We come to your house, measure your openings, and give you a real price. No charge, no pressure, and no guessing from a catalog.
Our own install crews
We never subcontract the install. The same crew that knows our windows is the crew on your house, which is exactly what our customers mention by name.
Brand-name windows, fair prices
We carry Andersen, Silver Line, Wincore, Atrium, and Quaker, and we have always sold quality windows at a great price. Customers tell us the value is why they keep coming back.
“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.”
Need replacement windows?
Free in-home estimates and honest answers, across St. Louis and the surrounding metro. Installed by our own crews.
Replacement windows questions we hear a lot.
Will new replacement windows lower my energy bills?
Yes, in most St. Louis homes they help. Old windows fog up, stick, and leak conditioned air, so your furnace and AC fight the weather all year. Tight, insulated replacement windows keep heated and cooled air where it belongs, which is one of the main reasons homeowners replace them. We help you pick the right brand and glass package for your house during your free in-home estimate.
How many windows can you replace at once?
As many as your home needs, whole-house included. One St. Louis customer had 20 Andersen windows installed in three days, and our crew kept the job clean inside and out the whole time. Most standard jobs are finished in one to two days. We measure every opening during the free estimate so the quote and the timeline are real, not a guess from a catalog.
Do I have to replace all my windows at the same time?
No. You can replace every window in the house at once or start with the worst rooms and phase the rest over time. We give you a real written price for the full scope and for a partial job at your free in-home estimate, so you can decide what fits your home and budget without pressure.
Have a question about estimates, brands, our crews, or where we work? See all our frequently asked questions.
Vinyl windows
Low-maintenance vinyl windows that hold up to St. Louis weather without the upkeep.
Entry & patio doors
Entry doors, storm doors, and sliding patio doors that look right and seal tight.
Siding
Low-maintenance siding that protects the house and refreshes the whole exterior.
Bay & bow windows
Bay and bow windows that add light, a view, and a little extra room to a flat wall.
Glass & window repair
Glass repair and window repair done at our shop and on-site, the same service for 30+ years.