A bay window has three panels (usually a large center picture window and two angled side windows). A bow window curves gently with four or more panels. Both project outward, so they need support and a small roof or cap.
Cost at a glance
| Cost | Source | |
|---|---|---|
| Andersen bay/bow, installed | $1,600-$4,000 | Fixr.com cost guides |
| Bay/bow unit (excluding installation) | $2,500-$6,500 | Inch Calculator, window replacement cost |
| Installation labor | Higher than standard windows, often $500-$1,500+ | TheWindowCo estimate from published averages |
What affects the price
- Structural work: enlarging the opening or adding a header increases cost a lot.
- Roof cap or seat: copper or shingled caps and interior seats add cost.
- Size and panel count: bows with five or six panels cost more than three-panel bays.
Ways to save
- Replace an existing bay with the same size to avoid structural work.
- Choose vinyl or composite side windows with a fixed center pane.
Get an accurate price
Online averages are a starting point. Window prices depend on exact sizes, your home’s condition and local labor rates, so the only reliable number is an itemized, in-home quote. Compare at least three, and use our window cost calculator to sanity-check them.
Frequently asked questions
Is a bay window worth it?
It adds light and a little floor space, and can lift resale appeal, but it’s one of the most expensive window types per opening.
What readers paid
Had this done recently? Share what you paid so the next person has a real number to compare. The first good one goes right here.
Share what you paid
Questions from readers
Question about Bay and bow windows? Ask it here. We answer the useful ones on this page, in general terms.
Ask a question
Free · No obligation
Get free window replacement quotes
Tell us about your project and we’ll try to match you with up to three local window installers who can give you an in-home estimate.
