Here are the top three things you should do/know/ask when hiring a landscape contractor… Obtain a copy of their Worker’s Compensation, General Liability and Automotive Insurance. By law, this information MUST be faxed, mailed or e-mailed directly from their insurance company. Do not allow the contractor to simply hand you a copy as it could be expired. Check references for other projects in the area and take the time to drive by them. Ask your contractor for a lien waiver upon completion of the project. This protects you in the event the contractor fails to pay their material supplier or subcontractors.