The following requirements are from the The Tennessee Board of Architectural and Engineering Examiners Reference Manual, detailing when an architect or engineer is required to stamp the drawings for a project.
In general, all structures must have plans prepared by design professionals registered by the Board. Plans and specifications for all structures classified as "assembly," "educational," and "institutional" must also be prepared by architects or engineers.
The only exceptions to this requirement are:
1. Structures classified as "business," "factory-industrial," "hazardous," "mercantile," "residential" and "storage" occupancies which are: (1) Less than three stories in height; and (2) Less than 5,000 square feet in TOTAL gross area.
2. One-family and two-family dwellings and their accessory structures
3. Farm buildings not intended for human occupancy.