5 county-level rules, plus city-specific rules for 1 city in Davidson County, Tennessee.
Verified from official government sources
Metro Nashville Stormwater Regulations (Metro Code Title 15.64) require permits for land disturbance of 1 acre or more and water quality treatment for the first inch of runoff. Metro Water Services administers the MS4 permit.
Metro requires EPSC (Erosion Prevention and Sediment Control) plans for grading permits under Metro Code 15.64 and TDEC CGP. Certified EPSC Level 1 inspector required on larger sites. Silt fence, stabilized construction exits, and inlet protection standard.
Davidson County is inland (no coast) but Metro regulates development along the Cumberland River, Mill Creek, Richland Creek and floodplains. Water Quality Buffer Zones of 30-60 feet apply to blue-line streams under Metro Code 15.64.
Davidson County has extensive FEMA Zone AE flood hazard areas along the Cumberland River and its tributaries. Floodplain development requires Metro Water Services permits. Updated FIRM maps from February 2022 added 1,000+ properties to flood zones.
Metro requires a grading permit from Metro Codes for land disturbance over 10,000 sq ft or any disturbance in a floodplain. Drainage may not adversely affect adjacent properties. Retaining walls over 4 feet need engineered permits.
1 cities in Davidson County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
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Davidson County Ordinance Hub →