Planning Permission on a site is (normally) given for 5 years. My question is in raletion to the time close to the expiry of the PP and the house for which the permission has been given has not been built. To what level does the house build have to be to meet the PP requirment at the end of the 5 years. Is it possible to get an extension of the 5 years if the house has not been built or is a complete new submission required?