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Board of Zoning Appeals approves accessory dwelling unit at 521 Williamsport Drive with conditions
Summary
The Smyrna Board of Zoning Appeals approved a special exception to allow an attached accessory dwelling unit at 521 Williamsport Drive. Staff recommended approval citing compliance with ordinance standards; the board approved the request with conditions including payment of fees and a prohibition on rental use.
At its March 2026 meeting, the Smyrna Board of Zoning Appeals approved a special exception to permit an attached accessory dwelling unit at 521 Williamsport Drive.
Mitch, a town staff member, told the board the parcel is about 16,575 square feet and zoned R3 (medium-density single-family). He said the proposed addition would be located on the west side of the dwelling and estimated it would be roughly 500 to 700 square feet. "Staff finds that the proposed use of an attached accessory dwelling unit should not negatively affect the health, safety, and welfare of the public," Mitch stated, citing Section 7.060 and Section 5.051.3C of the municipal zoning ordinance.
Staff also noted the extreme northwest corner of the property contains limited 100- and 500-year floodplain area and said the project would not affect that mapped area. Photos and the site plan shown to the board identified the addition footprint and confirmed a 10-foot side setback that staff said would be met.
A committee member moved to approve the special exception with staff-recommended conditions: payment of all applicable fees (including Rutherford County development tax, town impact fees, and code inspection fees), compliance with all applicable code and fire-department requirements, and a condition that the unit not be used for rental purposes. Another committee member seconded the motion. The board approved the motion by voice vote; the transcript records the motion as approved but does not record a roll-call tally.
The board opened a public hearing on the request and invited comments; no members of the public spoke during the hearing. The board then returned to other business and adjourned the meeting.
