This is the image I am trying to recreate.
However I am stuck on one part.
One side of the house is separated from the other by a curved wall rather than a corner.
How would i go about adding the shape I wish to the curved surface without it looking untidy.
For example if I made the window and tried to manually curve it, I doubt it would look very good so is there a tool that allows me to do what I mentioned?
In the example photo, I do not believe that the windows are curved. It is an illusion from having the surfaces above and below the windows curved. To me, it appears that the window frames are planar.
I agree with jrboddie1. Windows are usually flat objects, especially in old-style buildings. I would model a single flat window frame and use an array modifier with a rotated empty to place the window frames on a circle.