Louisiana
http://www.contractors-license.org/la/la.htm
Louisiana needs a building contractor be registered if construction work passes $75,000.00. Home improvement and repair contractor limits are between $7,500.00 and $75,000.00. If a repair or improvement passes this limit, the home improvement contractor must register as a building contractor.
License search: http://www.lslbc.louisiana.gov/contractor-search/