37 states require a license to perform home inspections.
They are: Alabama, Alaska, Arizona, Arkansas, Connecticut, Delaware, Florida, Illinois, Indiana, Kentucky, Louisiana, Maryland, Massachusetts, Mississippi, Montana, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Vermont, Virginia, Washington, Washington DC, West Virginia, Wisconsin.
Contact the state licensing authority for additional information.