If this is something you can't do yourself i.e. break down all the materials needed and the costs I would suggest you approach a Quantity Surveyor who will do this from the Architects Drawings. Obviously as a Carpenter you will need associated trades such as a bricklayer, plumber, electrician etc to be involved, so you could piece it together yourself by getting individual quotes for each process and adding them to your own. Not that I get involved myself with building work but I believe there are books available to help with this sort of thing so check this out or simply approach an experienced builder for advice. Always remember if you are running the show to manage the job in an organised manner as delays cost money, particularly if you hold up a trade!