Cost of window installation — St. Louis, MO

Last updated: September 24, 2026

What affects the price

Replacing windows is a custom job, so your final bill depends on a few specific variables. The size and style of the window frames—like double-hung versus large picture windows—play a big role. Choosing energy-efficient glass coatings or adding decorative grids can also shift the total. We also look at the condition of your existing frames and whether the installation requires structural repairs to the surrounding wall. Your exact pricing is confirmed free on the call.

About this service

The cost of window installation is the combined total for new, energy-efficient units and the labor to remove your old, failing windows. This is the right time to reach out if your windows are difficult to operate or if you have visible cracks in the glass. Because every home is built differently, we assess your specific project needs. We provide exact pricing confirmed free on the call.

Frequently asked in St. Louis

Also serving nearby: O Fallon · Springfield · Columbia · Champaign · Peoria

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More on this: DOE window guidance — install vs replace decisions.

Service area details

Serving all of St. Louis — population 281,754; about 4,565 residents per square mile across 61.7 sq mi.

Neighborhoods served in St. Louis: Soulard, The Hill, Central West End, Tower Grove East, Downtown St. Louis — and every surrounding area.