Here is a recent response on cost to install a sliding glass door which is quite a bit easier than a french door but same general size.
Convert bay window to french doors.
Hi there we have a 3m bay window which we are converting to 1 7m approx french doors with two side windows.
Because you are almost certainly going to be increasing the width of the opening and very likely raising and lengthening the support header over the window as well you are going to to be above the cost in the referenced comments probably in the 2000.
We have a bay window that sticks out of the back of the house.
That s why projects like turning a window into a patio door or changing a regular window into a bay are becoming more and more popular.
The bay window is load bearing just for a small canopy above the window only so the new structure needs to be fitted with care.
The only problem with some of the suggestions is that they already ordered the custom non returnable window before i was ever involved.
The good news about turning a window into a door assuming it s wide enough is that the advanced carpentry required for altering a load bearing wall.
You can expect an average cost of 525 and up.
It s true that these projects have their own particulars but when done properly they aren t any less successful than a regular window replacement.
Before converting a window into a patio door.
We don t want to lose the space of bay and would like to replace the flat bay roof with a glass ceiling of sorts.
The cost to install french doors starts at about 400 and with labor estimates running between 75 and 180 per door.
All sounds good except the as a tiny little patio door these are older folks now.
So you ve just built a new deck on the back of your house and those once lovely double windows in the living room would now make a better door sliding glass or french out to that awesome deck.
Patio door installation you converting window to french doors you 44 best french doors images 11 best convert bay window to french doors images 26 best patio door ideas images in 2020 doors french bay bow windows renewal by andersen.
We are looking to change the end window into a form of french doors is this possible who would we speak to.
There s also another option you might not have considered yet converting an existing window into a french glass door.