Anybody have an idea how much it would cost to convert a single garage into a home cinema room ? Currently I have an integrated single garage with up and over door. I would like to keep the door so it looks like a normal garage from the outside. I would require the inside blocking up (concrete blocks) and then everything insulating (for warmth and sound). Hopefully I have put this in the right thread. Didn't want to put it in DIY as I can't do it myself ;-) Thanks.