About to move into our new flat that has had double glazed panels put into sash frames. You have to look very hard to see what has been done and you can't tell from the road. It's listed and no consent was sought (several years ago by a builder, not the person we are buying from). Understand there are issues with building regs and also planning consent. Anyone know what the council will do in this sort of situation? I want to make sure it's all legal for the day we need to sell, but first off the windows need renovating as it's too drafty to live in right now, don't want to spend cash on this and then get told it's wrong later. Told planners can take weeks and we can't wait that long as we would freeze to death! Anyone had any experience with the planners etc?