I'm doubtless showing my ignorance here, but I'm just curious as to what would happen if I simply didn't pay the (extortionate) building regs fee that the local council have invoiced me for. We're currently having our loft converted and have been sent a bill for £490 by building regs. But I know a few people who have never had their building works signed off, either because the officer wasn't happy with something trivial such as a window being fitted 4 inches too high, or else because the job is kind of still on-going four years later. But no-one seems too concerned that their works haven't been signed off and I've heard it said that after a couple of years it's meaningless anyway (in terms of reassuring potential buyers) because anyone could have done anything to the property in the meantime. Which therefore begs the question, if I'm planning to keep living in the place for at least 5 years, why bother paying the fee? What would happen if I didn't? Would I go to prison or would I just not get a piece of paper which will soon be worthless anyway? As ever, any thoughts or advice gratefully received.