Building permits in Louisiana
3 jurisdictions, each with the department that issues, its portal and its phone number. Cities issue their own permits; counties cover unincorporated areas, which is the distinction that sends most contractors to the wrong office.
3 checked against the department's own page
Licensing
Commercial contractor license required for projects $50,000+; residential $75,000+ (LSLBC).
Louisiana State Licensing Board for Contractors (LSLBC)