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Question DetailsAsked on 11/30/2014

what is generally the cost of replacing a bay window

I have a wood bay window and the center glass slipped. when I examined I found wood rotting underneath. I am looking to replace the entire window which is a large center with two smaller windows on the side.

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Here are a couple of prior similar questions with some typical cost info that might help -

ballpark from around $1000-2000 for a smallish one (say 3-5 feet wide) to $2000 plus for 7'+ in width - assuming a straight window replacement with same size window in same rough opening, NOT including replacing surrounding roof and wall framing if it got rotted (normally not). And as window Man said, in the ballpark of twice that for a new install in a location that did ont have one, or for a widening of the rough opening for a larger window, up to about 8-10 feet wide. Over that, then you typically get into the $5000-10000 size job, both because the central (and commonly side also) window itself is gigantic, but you are also talking putting in a massive beam to support that wide an opening in the wall.

For a small kitchen "garden window" type - basically a 3-4 foot square mini bay window hung on the outside of the house in a metal frame, you can sometimes get those for more in the $750-1250 installed cost range, especially the store-bought prefab ones.

If also makes a LOT of difference how the existing window unit was installed - many installers/builders build a totally independent framing bay to supportthe window - so it is totally framed out as a rough opening and then the window slipped intot the opening. Some installers, especially if adding a bay window into an existing house, instead basically buld a minimalist supporting frame using the window frame itself as part ofthe supporting framework, so if you have to take it out you tear out part of the supporting framework with it, making replacement much tougher.

Herew are a couple of more links to questions about leaking/rotting bay windows that might or might not have something of interest to you in them -

Answered 5 years ago by LCD

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