What the Smyrna zoning ordinance says about setbacks, district by district. Section numbers link to the official ordinance.
R-1 yard standards: front 35 ft, side 15 ft, rear 25 ft. The side setbacks on two adjacent lots may be reduced to a combined 25 ft (10 ft and 15 ft paired) on a Planning Commission approved subdivision plat that shows all four setbacks. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
R-2 yard standards: front 35 ft, side 12 ft, rear 20 ft. The side setbacks on two adjacent lots may be reduced to a combined 22 ft (10 ft and 12 ft paired) on a Planning Commission approved subdivision plat that shows all four setbacks. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
R-3 yard standards: front 35 ft, side 10 ft, rear 20 ft. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
R-4 yard standards: front 35 ft, side 10 ft, rear 20 ft. Zero-lot-line construction must also meet the party wall and planned development side yard provisions in Sections 4.074 and 4.080 where they apply. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
R-5 yard standards for a mobile home on a single lot: front 35 ft, side 10 ft, rear 20 ft. Mobile home parks use park-level setbacks (front 30 ft, side 15 ft, rear 10 ft, larger where noted) with 20 to 30 ft separations between units under Sections 5.051.5.E.2 and 4.090; the ordinance table marks conditions with asterisks, so read the exact row before siting a unit. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer. (Flag 2026-07-03: the mobile home park setback table prints out of alignment in the June 2026 PDF; the single-lot values are clear, but have Planning confirm park-level setbacks and the asterisked conditions.)
R-6 yard standards: front 35 ft, side 10 ft, rear 20 ft. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
C-1 yard standards: front 25 ft, but where adjacent buildings provide front yards under 20 ft the front yard equals the average of the adjacent front yards; no side setback is required, but any open side area provided must be at least 10 ft wide and unobstructed; rear 20 ft. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
C-2 yard standards: front 35 ft, side 15 ft, rear 20 ft. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
C-3 yard standards: no front setback, side 15 ft, no rear setback. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
C-4 yard standards: front 25 ft, side 15 ft, rear 20 ft. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
C-5 yard standards: front 35 ft, side 15 ft, rear 20 ft. Gasoline service stations also need a 40 ft building setback from street rights-of-way with pumps at least 25 ft back under Section 4.060. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
P-O-1 yard standards: front 35 ft, side 15 ft, rear 20 ft. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
P-O-2 yard standards: front 35 ft, side 15 ft, rear 20 ft. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
I-1 yard standards: front 30 ft, side 20 ft, rear 25 ft. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
I-2 yard standards: front 60 ft, side 30 ft, rear 30 ft. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
I-3 yard standards: front 100 ft, side 50 ft, rear 50 ft. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
A-1 yard standards: front 50 ft measured from the edge of the public road right-of-way, side 25 ft, rear 25 ft. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
PRD dimensional standards: Under Section 4.073 no minimum lot size or yards are required within a planned development, but developments of 25 or more single-family dwellings must use three lot-size tiers (7,000, 9,000, and 11,000 sq ft minimums at maximum 40 percent, maximum 30 percent, and minimum 30 percent of lots), and lots abutting Town R-1 or county RM property must be at least 11,000 sq ft with a 20 ft landscape buffer. Use the approved plan for parcel-specific standards. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
PCD dimensional standards: Under Section 4.073 no minimum lot size or yards are required within a planned development, but developments of 25 or more single-family dwellings must use three lot-size tiers (7,000, 9,000, and 11,000 sq ft minimums at maximum 40 percent, maximum 30 percent, and minimum 30 percent of lots), and lots abutting Town R-1 or county RM property must be at least 11,000 sq ft with a 20 ft landscape buffer. Use the approved plan for parcel-specific standards. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
PID dimensional standards: Under Section 4.073 no minimum lot size or yards are required within a planned development, but developments of 25 or more single-family dwellings must use three lot-size tiers (7,000, 9,000, and 11,000 sq ft minimums at maximum 40 percent, maximum 30 percent, and minimum 30 percent of lots), and lots abutting Town R-1 or county RM property must be at least 11,000 sq ft with a 20 ft landscape buffer. Use the approved plan for parcel-specific standards. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
PUD dimensional standards: Under Section 4.073 no minimum lot size or yards are required within a planned development, but developments of 25 or more single-family dwellings must use three lot-size tiers (7,000, 9,000, and 11,000 sq ft minimums at maximum 40 percent, maximum 30 percent, and minimum 30 percent of lots), and lots abutting Town R-1 or county RM property must be at least 11,000 sq ft with a 20 ft landscape buffer. Use the approved plan for parcel-specific standards. Overlays, planned-development approvals, recorded conditions, and Article VI exceptions can change the parcel-specific result; confirm with Smyrna Planning and Zoning before relying on this answer.
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