Show single contractor most satisfactory in end placing a contract for the finished house in the hands of a single responsible contractor usually Is tile the roost most satisfactory method when a 8 contract Is let to a single singla contractor on a lump sum basis tho the owner knows Oxil exactly etlY what the total cost of the house will be if his plans are complete and no extras have to be added as aa the work progresses this practice Is somo sometimes tImes varied by placing most of the work under one contract separate contracts only for lighting heating and plumbing equipment another form of contract which Is not likely to prove as satisfactory as the lump sum contract la IS to have the contracting builder pay for all labor and materials and receive in addition an agreed percentage of their cost this Is known ns as tile the cost plus system its weakness lies iles in that it gives the contractor an incentive to let labor and material costs mount up and that the total ultimate cost la Is not determined in advance A third common form of building contract provides that tile the contractor shall be ba paid for materials and labor and a fee for supervision fixed in advance |