Tennessee Code Title 5. Counties § 5-9-113

(1) “Affordable housing” means housing that, on an annual basis, costs thirty percent (30%) or less than the estimated median household income for households earning sixty percent (60%) or less of the area median income for the Nashville-Davidson County metropolitan statistical area as determined by the United States department of housing and urban development, adjusted for family size; and

(2) “Workforce housing” means housing that, on an annual basis, costs thirty percent (30%) or less than the estimated median household income for households earning more than sixty percent (60%) and not to exceed one hundred twenty percent (120%) of the area median income for the Nashville-Davidson County metropolitan statistical area as determined by the United States department of housing and urban development, adjusted for family size.