The frontage is mutli layered but I have neither the skills nor the patience to prepare a detailed set of technical drawings. I just did an outline on paper and laid out the windows to make sure the front looked about right in plan view. I'll make the rest up as I go along.
The rear wall I'll cut out later when I work out how the roof fits - I have no idea at the moment since I can't see past the huge facade. It might be Georgian style with a shallow pitch and flat on top. Or there might be nothing at all behind the top 3 windows!