Make certain that any contractor you consider hiring has a license for the work they are performing, liability insurance, and workman’s compensation insurance. These are vital prerequisites for protecting yourself from any serious liability in the unfortunate case of an accident. Each state has its own requirements for licensing contractors. You may want to check with your local building inspection department or visit http://www.contractors-license.org/ to determine what is required where you live. A contractor must maintain liability insurance and workman’s compensation insurance to ensure you don’t get stuck with the bill if your house gets damaged or end up in court if someone falls off a ladder and gets hurt. All legitimate contractors will be aware of the local laws and regulations and should be more than willing to put your concerns to ease. Most contractors advertise using their license number to eliminate any questions. These items should be clearly listed on the contract to provide you with a record of their credentials.