Cost guide
Bay & Bow Window Cost (2026)
Quick answer: A bay window runs $1,200–$3,500 installed and a bow window $1,500–$4,500 in 2026 — several times a standard window, because they’re really 3–5 windows joined in one angled or curved unit. Panel count, frame material, and whether the opening needs structural or roof work drive the price.
A plain replacement window is one sash in one opening. A bay or bow is a projecting unit — several windows framed together that push out past the wall. That’s why the price jumps: you’re buying more glass, more framing, and often a small roof and structural support.
A bay window isn’t one window. It’s three — plus a little roof.
Bay vs. bow: the difference (and the price gap)
A bay is three panels set at sharp angles (usually 25—45°), so it juts out in a boxy shape. A bow uses four to six panels in a gentle curve, so it needs more units and more careful framing — which is why bows usually cost more than bays.
What actually moves your quote
Four things: panel count (more panels, more cost), frame material (vinyl is cheapest; wood and clad-wood cost most), structural work (a projecting unit often needs a support cable or knee braces), and the roof and seat — bays usually need a small roof cap and an interior seat board, both extra labor.
Bay & bow cost vs. a standard window
| Window type | Typical installed | Panels | What you're paying for |
|---|---|---|---|
| Standard double-hung | $360–$850 | 1 | The baseline single window |
| Garden window | $1,000–$4,000 | 1 box | Projects out; glass shelf for plants |
| Bay window | $1,200–$3,500 | 3 | Angled projection, mini-roof, seat |
| Bow window | $1,500–$4,500 | 4–6 | Curved run of windows, most glass & labor |
Bay or bow, the quote swings by thousands. See your regional number first.
Free cost estimator →Can you swap a bay for a regular window?
Yes, and it’s much cheaper — filling the projection back to a flat wall with one or two standard windows drops you back toward $360–$850 each. But you lose the light, the view, and the seat that made the bay worth it. Most homeowners who love the bay replace it in kind.
Frequently asked questions
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Get your estimate →Cost figures in this guide are compiled from publicly available 2026 U.S. pricing data — including ENERGY STAR, the U.S. Department of Energy, national contractor cost guides (HomeAdvisor / Angi True Cost), and Remodeling’s Cost vs. Value report — and are intended for planning only. Prices vary by region, brand, and installation; always collect 2–3 local quotes.
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