HI Everyone, I'm based in the West Midlands and would like a rough idea of costs and things to watch out for in relation to a workshop I would like constructed. Any help gratefully received. In the picture you can see my garage on the left and my neighbours on the right. I want to build a workshop in the middle (around 9ft wide and 15ft deep). I want to match the bricks and have a double glazed single door into the workshop. Inside i just need a concrete floor, a light and a double socket. I'm hoping I might be able to use my garage wall and my neighbours wall (which I won't drill into) as the side walls - which will reduce the cost (not sure if I have to ask their permission if I don't put holes in their wall. Thanks in advance.