This might be enough for some people but it is worth considering whether the door will be wide enough.
Cost of converting windows to french doors.
Sysysysref tue 13 jun 17 15 40 13.
Cost to convert a window to french doors 8 posts add message report.
We currently have a window and would like to replace the window with straightforward white upvc french doors.
It doesn t need a support or lintel it just needs the window removing and the brickwork underneath the window removing.
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.
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.
You can expect an average cost of 525 and up.
There s also another option you might not have considered yet converting an existing window into a french glass door.
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.
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.