If the new dwelling is partly or wholly contained inside the existing building, You can not zero charge your perform underneath the rules In this particular area. You may be able to minimize price your charge as a ‘improved variety of dwellings conversion’ ― the rules are spelled out in https://buildingandcostruction37700.digitollblog.com/32543132/how-building-and-costruction-can-save-you-time-stress-and-money