Average cost 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

When planning for replacement windows, the total investment is driven by the quality of the frame, the energy performance of the glass, and the scale of the installation. Larger windows or specialty shapes often require more time and materials. Since no two installation projects are identical, we evaluate your specific needs to provide you with exact pricing confirmed free on the call.

Frequently asked in Longmont

Also serving nearby: Boulder · Thornton · Westminster · Arvada · Greeley

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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: Country Club, The Lakes at Centerra, Prospect New Town, Old Town Longmont, Plaza at Centerra — and every surrounding area.