All construction and renovation work requires a written contract with the client and some kind of plan, on paper or in digital form. And for most jobs, big or small, a building permit may also be required.
PLANS
For every job, make technical drawings that show construction details, locations of systems and specifications for material installation. Keep track of completions and changes. Consider hiring a professional designer as part of your job costing.
BUILDING PERMITS
Consult with local municipal building officials to obtain the proper permits for the work you're undertaking. Significant changes to a building envelope, structural changes or changes to systems like plumbing or electrical require a permit. Ensure that your work is cleared with your local building office.
CONTRACTS:
Always work to a written contract. Clearly outline the scope of work, describing tasks, milestones, payments, contingencies and agreed upon goals before the contract closing. Consider a consultation with a legal professional who specializes in construction contracts.