For all home construction and home improvement projects over $3,000, Maine law requires a written contract with a specific provision that prohibits payment up front of more than one third of the contract price. When a contractor asks you for any money up front, make sure that the money is being used to purchase materials for your project. Ask for receipts and for a lien waiver from subcontractors. A model home construction contract that meets State law can be found in Chapter 18 of the Maine Attorney General's Consumer Law Guide.
Chapter 18: Attorney General's Model Home Construction Or Repair Contract