How much does it cost to change a casement window into a bay window?

I am planning to change the window of my room. How much will it cost to change the casement window into a bay window. Or sliding/gliding window better than bay window? Thanks a lot! Nice day! :DHow much does it cost to change a casement window into a bay window?You can buy bay windows already made prefab...It is a matter of simply cutting a hole to fit and framing it in after instillation..it is not so easy as I made it sound by using the word %26quot;simply%26quot; but to a carpenter it is quite simple..If a prefab was bought a carpenter would do it for around 400.00..you furnishing all materials..if they have to actually build a bay window..install glass/windows etcetera..You could get as far as 2000.00 to do the job...Keep in mind a good prefab bay window could cost 1500.00 or even more..depending on what you pick...this is before instillation..so around 2000.00 to 3000.00 total one way or another I would presumeHow much does it cost to change a casement window into a bay window?You are going to have to reframe the whole thing. It would impossible to tell you how much it will cost. I would not use a slider, a bay window is rather large. What kind of a room is this? Really need a lot more info.