Planning commission approves combining two Winston Place lots despite septic permitting uncertainties

The Sumner County Planning Commission on Sept. 16 approved the resubmission to combine Lots 53 and 54 of Winston Place Section 3, a step applicants said is necessary to obtain a building permit for a proposed house. The commission acted after hearing staff explanations about a grandfathered septic approval and technical questions about the state review process.

Commissioners said the lot combination is intended to allow a single parcel to rely on an existing septic approval that was issued under older standards. Why it matters: county staff and residents said the existing approval covers only a two‑bedroom septic system and that state procedures (TDEC) have procedural limits on signing plats that do not meet current standards, which could block issuance of a building permit unless the lots are combined.

Staff described the request as essentially removing a lot line so the existing septic area and the house site would lie on the same legal parcel. According to staff, the property currently carries a TDEC approval shown on the submitted paperwork that allows a two‑bedroom septic system; that approval was described as a ‘‘grandfather’’ approval dating to older standards. The county’s presentation also noted a geotechnical review and earlier attempts by state reviewers that flagged rock and required additional soil mapping.

Property owners and their representatives told commissioners they had taken steps with the state and had installed an approved septic area. ‘‘I’m Dave Duetree. So I’m the owner of Platinum Investment Group. Yeah. Yeah. I’m on both of those lots, Platinum Investment Group,’’ one owner said during the hearing. Staff and several commissioners pressed for technical confirmation that the installed leach field and septic system match the proposed use and noted the risk that a future buyer could expand use beyond the two‑bedroom approval.

Commissioners repeatedly urged caution. One commissioner said waivers ‘‘shall not have the effect of nullifying the intent and purpose of regulations’’ and asked that a soil scientist or further verification be obtained if there was lingering concern about soil conditions and proximity of the leach field to neighboring properties. Another commissioner said that, absent a recorded plat combining the lots, the county might be unable to issue a building permit.

The planning commission recorded votes in favor from several members and approved the lot combination; the transcript records affirmative votes for Commissioners Mittler, Belcher, Holmes and Straw and indicates one commissioner abstained because of a business relationship with the applicant (name not specified in the record). The approval was taken with the understanding that the plat would be recorded across the hall at the registrar’s office after the planning commission signature process.

Staff and commissioners said the state (Tennessee Department of Environment and Conservation, TDEC) sometimes will not sign a subdivision plat unless a submission plan meets current requirements, even when older, grandfathered approvals exist; that procedural issue was central to the request. Commissioners recommended, and applicants agreed to, providing clear soil‑boring documentation or a survey note as appropriate if the commission or registrar requires it for recording.

Less critical details: speakers discussed historical context (the original approvals dated to the 1970s), that some lakefront lots in the county have similar grandfathered septic arrangements, and that the county’s subdivision regulations require showing adequate septic area on lots. The commission’s action addresses only the lot‑line and plat recording question; it does not change the scope of the state septic approval or otherwise modify TDEC’s authority to enforce current septic rules.

For next steps, staff indicated the signed plat would proceed to recording; the transcript does not specify any additional formal conditions beyond the discussion and the recorded vote.