I've been quoted nearly £20k (incl vat) For taking out all existing pipework and central heating system and replacing both. The system is old and has been updated on a piecemeal basis. Tanks in loft, oil boiler over 20 years old. House is being re-arranged so a change to kitchen, bathroom and new utility and cloakroom being created plus a new porch. it will be a new oil combi boiler Price does not include sanitary ware but thats not a lot these days I've used the plumber before and he has worked with the builder and electrician before. is this price in the right ball park?