A good contract makes the project workflow visible. It should say what is included, how decisions become changes, when money is due, and what happens when conditions differ.
Attach a scope someone can price
Reference drawings and specifications by date, list inclusions and exclusions, state allowance assumptions, and identify owner-supplied items and permit responsibility.
Make changes a process
Define who can authorize work, how cost and time are presented, whether work may begin before signature, and how concealed or emergency conditions are handled.
Use local legal review
Contractor laws vary by state and project type and may require notices, formatting, cancellation rights, deposit limits, or specific clauses. Have qualified counsel adapt the final contract.