Work is scheduled to start on our house around 9 June. We're renovating the upstairs of house, including 2 new bathrooms and there will also be some groundwork. It will cost around £37k (including VAT) - the bathrooms are quite high end, so that will be a fairly large part of the cost (not sure if that's relevant).
Our builder is asking for a 50% deposit, to be paid now, 2 months before they start. Is that normal? It's a listed building, we've struggled to find anybody else to do the work and we really don't want to piss them off before we start, but neither do I want to potentially lose £18k!
Their reviews are good, but I'm not sure how meaningful that is. Any advice, please?