Can anyone tell me how a building regs inspector assesses and signs off work done on an extension 10 years ago? During the build, we had regular inspections and sign-offs but never the final one. It's become urgent now as we are trying to mortgage the house and as we've spoken to our LA an indemnity policy isn't an option. We have certificates for electrics and plumbing from the trades men. Our other concern is that we have installed a different type of boiler from the one we had permission for although we do have an installation certificate for that, again from the installer. I know that the old building regs will be applied (rather than today's) but I also understand that enforcements can't be required if work done over 10 years ago. Where does that leave us in terms of getting a certificate?