A contract should tell both parties what will happen when the project proceeds normally and what process applies when it does not.
Attach the details
Drawings, cabinet schedules, appliance specifications, finish lists and the accepted quote should be incorporated or clearly referenced. Avoid relying on verbal assurances for work that affects price or appearance.
Define allowances and substitutions
Identify the allowance amount, whether it includes tax and installation, and what happens when a selected product is unavailable. Substitution approval should be written.
Use milestone payments
Payments should correspond to mobilization, delivered materials, completed work or inspections. The legal rules for deposits, holdbacks and liens vary; seek local advice for large contracts.
Approve changes before work proceeds
A change order should state the reason, revised price, tax, schedule effect and any consequences for other work. Emergency action may sometimes be necessary, but documentation should follow promptly.