Hi, we have had a builder provide us with a written quote for some work. All agreed to go ahead however he has just sprung on us that he has now become vat registered which means we have an extra 20% to pay..this adds almost £1000 on to our bill. I'm not sure where I stand with this. WIBU to refuse to pay the additional amount? Is the builder being unreasonable asking me to pay an additional amount or should they just take it on the chin? I'm not too sure what my rights are..I just want it to be fair for all parties. I'm likely to go ahead with the builder regardless as I've seen his work...I just don't want to get taken for a ride!