We've been incredibly lucky and got an offer on our property within 24 hours of being on the market but are now terrified we are going to lose the sale due to the lack of building regs on our extension. We only had the extension done last year to replace a falling down conservatory put on by the previous owners. We checked with planning and found that it would come under permitted rights but we didn't realise that it would still need building regs. I know this sounds incredibly stupid but we had a very hard year with our child being seriously ill and spending lots of time in hospital so we just left the work to the builders. It turns out the builders were very busy with multiple jobs on at the same time and so ignored building regs in favour of getting the job done (& paid for) asap. The builders insist that the work is up to scratch and are willing to uncover (& make good) whatever a building inspector needs to see. We would of course be willing to do any work necessary if it turns out that any elements don't comply. My question is, will this cause a huge delay on our sale? I'm so worried about it.