The most important thing you must remember to do is get everything in writing. You and the contractor should work together to determine what is inclusive in the quoted price. Go over some home improvement tips for the contractor to know exactly what you are expecting. Get a detailed listing of everything, including materials, as they a part of the bid price. Keep the initial proposal as detailed as possible, so you know exactly what the contractor offers to do for the price. Things you agree upon verbally should also be recorded in written form, signed, and documented.