Hi, I’m looking for a bit of advice regarding a project i’m hoping to get completed, I have contacted our local building control guys to see if this is OK to do but i'm still awaiting their reply. It is a fairly straight forward job with no structural work involved and no change in usage, above our double garage we have a large 7.75 x 5.93m room that is used as a cinema room and a study. I have had a builder in to quote to partition the current cinema area of the room, this would involve building stud walls to create a 5 x 3.6m area so I can install in-wall speakers and a projector. The builder is pretty certain that I wouldn’t need building reg approval but I thought it would be worth checking as it would be an inner room. I have attached a plan I created which may explain the layout better. In the existing room there are 6 opening windows which I can easily get through and the existing door goes onto a landing and then downstairs to the main front door. Does anybody know if this would be acceptable and if so would it need any regs approval? Thanks Karl