Cost to install replacement windows — Longmont, CO
Last updated: September 24, 2026
What affects the price
Replacing your windows involves several moving parts that change the final bill. The biggest factor is the frame material, as vinyl tends to be more budget-friendly while wood or custom fiberglass options sit on the higher end. You also have to consider the glass packages—things like double versus triple panes or extra coatings for energy efficiency can shift the cost. The complexity of the installation matters, too, such as whether your frames need repairs or if you are switching from a standard window to a bay or bow style. Exact pricing confirmed free on the call.
About this service
Professional installation covers the labor required to measure, fit, insulate, and seal your new windows. The cost varies significantly based on how many windows you replace at once and the specific features like double-pane glass or grids. We provide a detailed estimate that covers the entire scope of the work. Exact pricing confirmed free on the call.
Frequently asked in Longmont
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Also serving nearby: Boulder · Thornton · Westminster · Arvada · Greeley
More on this: ENERGY STAR windows — efficiency ratings.
Service area details
Serving all of Longmont — population 98,630; about 3,396 residents per square mile across 29.0 sq mi. ZIP codes covered include 80501, 80502, 80503, 80504.
Neighborhoods served in Longmont: Mountain View, Golden Ponds, Village at the Peaks, Columbine, Old Town — and every surrounding area.
Areas we serve
Browse by state, then city.