Setbacks & Height Limits in Nashville

This guide explains the basic setback and height rules that apply to residential construction in Nashville under Metro Code Title 17 (Zoning). These numbers depend on your exact zoning district, overlay zones, and lot geometry, so always confirm with the Metro Nashville Planning Department before finalizing plans.

What Are Setbacks?

A setback is the minimum required distance between a building and a lot line. Setbacks are measured from the property line to the nearest point of the building (typically the wall, but eaves, bay windows, and chimneys can have their own rules).

Nashville's zoning code specifies front, side, and rear setbacks separately for each zoning district. Corner lots have two "front" setbacks (one per street frontage) and typically one interior side and one rear. In many established neighborhoods, Nashville also applies a contextual front setback — your front setback must match the average of neighboring homes on the block rather than the base district minimum.

Typical Residential Setbacks

For Nashville's most common single-family residential zones (RS5, RS7.5, RS10, RS20), expect approximately:

The parallel "R" districts (R6, R8, R10, R15, R20) share the same numeric setbacks as their RS counterparts but allow either single-family or two-family (duplex) development. Higher-density residential zones (RM) and mixed-use zones (MUL, MUN, MUG, DTC) have separate setback schedules — many downtown and mixed-use zones have zero front setback and build-to lines instead.

Height Limits

Maximum building height in Nashville's RS and R single-family residential districts is 35 ft, measured from average grade to the highest point of the roof. Duplex and multi-family buildings in RM districts generally allow 45 ft or more depending on the specific RM subcategory and lot size.

Height rules get more complicated in:

• Urban Design Overlays (UDOs) — many Nashville neighborhoods have UDOs that cap height below the base district limit
• Historic Preservation Zoning Overlays — height may be capped by context and subject to Historic Zoning Commission review
• Contextual standards — in some districts, maximum height is set by the average height of existing homes on the block
• Downtown Code (DTC) and mixed-use zones — generally allow greater height, often tied to building form standards rather than a flat number

Lot Coverage and ISR

Beyond setbacks and height, two other numbers shape how much you can build in Nashville:

• Lot coverage — the percentage of the lot covered by buildings. Most RS districts allow around 40 percent coverage for the principal structure.
• Impervious Surface Ratio (ISR) — Nashville uses ISR (rather than FAR) in many residential districts to limit the total hardscaped and built area, which protects stormwater drainage in Davidson County watersheds.

Common Exceptions and Encroachments

Metro Code Title 17 allows certain features to project into required setbacks. Typical allowances include:

• Eaves, gutters, and cornices (usually up to 2 ft)
• Chimneys (up to 2 ft)
• Uncovered porches, stoops, and steps
• Air conditioning condensers
• Bay windows (limited projection)

Fences, retaining walls, and accessory structures have separate rules — check the Title 17 chapter on accessory structures and the Metro stormwater regulations.

State ADU Overrides

If your project is an Accessory Dwelling Unit (ADU), note that Tennessee has no statewide ADU mandate, so Metro Nashville's local zoning ordinance governs. Nashville allows detached accessory dwelling units (DADUs) in many residential zones with reduced rear and side setbacks. See the ADU rules page for this city.

How to Look Up Your Specific Requirements

1. Find your zoning district — use the Metro Nashville zoning map on nashville.gov
2. Read the district regulations — Title 17 of the Metro Code lists setbacks, height, lot coverage, and ISR by district
3. Check for overlays — Urban Design Overlays, Historic Zoning Overlays, and floodplain overlays can modify the base rules
4. Ask planning staff — call the Metro Planning Department at (615) 862-7150 for a zoning verification before you commit to design

Variances

If your project cannot meet the strict letter of the zoning code, you may apply to the Metro Board of Zoning Appeals for a variance — a formal request to deviate from the rules based on hardship specific to your lot. Variances are discretionary and require a public hearing. See the Variance Application Guide for the general process.

Official Sources

See the sources linked in the frontmatter for Metro Nashville's Title 17 zoning code and the Metro Planning Department. This guide is informational and is not a substitute for direct confirmation from planning staff.

Disclaimer: Zoning codes are subject to change. Always verify current regulations with the Metro Nashville Planning Department or the Metro Code of Ordinances before making development decisions.