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.
Turning windows into french doors cost.
Turning a window into a patio door may seem like an overwhelming project for a homeowner.
The cost to install french doors starts at about 400 and with labor estimates running between 75 and 180 per door.
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.
The patio door after it has been installed.
There s also another option you might not have considered yet converting an existing window into a french glass door.
Andersen windows and doors sells french hinged and gliding patio doors in an array of materials like wood composite vinyl and aluminum.
Not only do you have to manage securing permits and the window company but you may also have to hire additional trades like drywall installers painters or electricians if you want the work to look seamless.
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.