Cost to install replacement windows — Boulder, CO

Last updated: September 24, 2026

What affects the price

Replacing windows involves several variables that change the final bill. The size and style of the window are big factors; fixed glass usually costs less than units that open, like double-hung or casement styles. Your choice of frame material—vinyl, wood, or fiberglass—also shifts the number significantly, as does the glass package you choose for energy efficiency. The complexity of the installation matters too, especially if there is existing rot or if the home needs structural work to fit new frames. Exact pricing confirmed free on the call.

About this service

Installing replacement windows is a process of removing old sashes or frames and fitting custom-sized replacements into your existing wall openings. Your final cost is driven by the quantity of windows, the style of operation—like sliders or double-hungs—and the energy-efficiency features you choose. Exact pricing confirmed free on the call.

Frequently asked in Boulder

Also serving nearby: Longmont · Westminster · Arvada · Thornton · Lakewood

All cities in Colorado →

More on this: ENERGY STAR windows — efficiency ratings.

Service area details

Serving all of Boulder — population 105,898; about 3,937 residents per square mile across 26.9 sq mi. ZIP codes covered include 80301, 80302, 80303, 80304, 80305, 80306, 80307, 80308.

Neighborhoods served in Boulder: Table Mesa, Newlands, Whittier, Downtown Boulder, Mapleton Hill, University Hill — and every surrounding area.