Stamp duty on new build. This topic has 0 replies, 1 voice, and was last updated 19 years, 8 months ago by marios. Viewing 0 reply threads Author Posts September 18, 2006 at 3:21 pm #52247 mariosParticipant How do you work out what stamp duty to pay on a new build when you have bought the plot and built seperately. Author Posts Viewing 0 reply threads The forum ‘Spanish Real Estate Chatter’ is closed to new topics and replies.