I'm in a bit of a muddle with VAT on a builders quote for dormer loft and other reconfiguration of the living areas.
The builder would be sub contracting lots of trades. Plasters, plumbers, carpenters, electricians etc. I get VAT would be paid for materials. I think I understand that not all trades people have to be VAT registered. Or would the fact they are doing work for the main contractor mean that VAT is payable? Would some invoices (handled and paid for by the builder) include VAT and some wouldn't need to?
My question is really how can I be sure my VAT bill is accurate?