In order to protect the safety and welfare of themself and the public, homeowners should be sure their contractor do quality and fair construction practices. Homeowners may use the Board for Licensing Contractors or to verify if contractor's license is an active and suitable for the project or contact at 1-800-544-7693 for assistance
A Tennessee contractor's license is required if the total cost of starts from $25,000 (includes materials and labor) to perform the following:
A license is needed in order to perform any improvements adjacent to the dwelling with total cost ranging from $3,000 to $24,999. It would include alter, replacement, modernization, or addition to any land or building, such as, swimming pools, porches, driveways, garages, fences, landscaping, fall-out shelters, roofing, painting and etc. This an actual requirement in some counties listed below:
In order to be more informed please check at Tips for hiring a contractor