Conversion (other than for housing associations) of a non-residential building into a qualifying dwelling or communal residential building and conversions of residential buildings to a different household use ― fee of VAT 5% (study section seven) SIPs are employed for numerous building forms, which include household and lightweight professional buildings. https://manuellrvze.onesmablog.com/the-best-side-of-building-and-costruction-73270703