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Question DetailsAsked on 4/20/2016

What is the average cost for large bay windows

We have a sealed in porch with 5 storm windows and would like to have new windows or a complete frame put in.

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2 Answers


an actual bay or bow window average 3000.00 to 6000.00 depending on type of wood ,oak or laminated and by brand .ie pella anderson etc.window world starts around 2300.oo or you ccould five seperate windows averaging from 500-1000.00 each.

Source: troy wenzl lincoln NE

Answered 4 years ago by troymwenzl


If you are looking at replacing 5 windows with one bow or bay window, then the pricing info provided by the other commenter would likely be for the windows only - a unit with 5 normal sized windows (or replacing 2-3 with a very large picture window) would commonly run what he said for the window unit only - more like $5-10,000 installed I would say. Individual windows in their own separate frames at the current storm window locations then the $500-1000 range each is commonly good unless you go real high end or triple-pane. Putting a number of individual windows into a straigth wall (no bow or bay) including reframing a header to allow them to sit more tightly edge to edge instead of 6-18 inches apart more like $3-6,000 range I would say for 5 windows.

One recommendation - I really recommend against large single-unit bay or bow windows because if you end up replacing one you may have to at least remove, if not totally replace, the whole assembly. I recommend, unless a fantastic picture view with minimal-dimension aluminum frames, that you have the contractor build a bow or bay window framing extension on the house, but put the windows in as individual units. Cheaper to install the windows, cheaper to replace any in the future if needed, and far cheaper to buy than as one large, hard to install unit. Commonly the difference in frame width beatween the glass panes if the difference between about 1-2 inch and 2-4 inches of framing width between windows. This assumes a header unit is put over the top so there is no need for structural supporting columns or studs down through the window unit - which is a REAL pain with bow/bay windows anyway unless the foundation also curves out the same way.

Answered 4 years ago by LCD

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