Planning commission approves multiple ZLDR amendments on trees, fill, drainage and fees

The Charleston County Planning Commission voted July 14 to recommend a package of text amendments to the County Zoning and Land Development Regulations Ordinance intended to implement the comprehensive plan, reduce BZA caseload, and improve resilience and code clarity.
Planner Wynn and staff described the package as a set of mostly technical and enforcement clarifications. The amendments include separating "clearing" from "grubbing" in definitions; clarifying tree-removal rules to require BZA approval for removal of healthy trunks, limbs or stems that count toward a multi‑trunk tree's total size; allowing administrative approval of tree‑encroachment up to 35 percent with an approved arborist treatment plan; correcting "caliper" to "diameter" in tree-measurement language; adding a definition for temporary driveways; and specifying mitigation-fee amounts.
Wynn said the mitigation fee was set by benchmarking nearby jurisdictions, resulting in a figure of $250 per inch for tree mitigation. "That was where the number came up of the 250 per inch," Wynn said, summarizing the approach.
Other changes require Public Works Director approval before structural or nonstructural fill may be placed in setbacks, require road and drainage plans to be approved before preliminary plats, and require as-built surveys plus stormwater permanent maintenance covenants before final plat approval. Staff said the road-and-drainage changes seek to ensure permanent best-management practices for roads and stormwater are complete before final plat acceptance.
County arborist Kyle Foster and Public Works representative Chris Wanamaker were present and available to answer technical questions; no public commenters signed up on these amendments.
Commission discussion focused on practical enforcement. Commissioner Adam McConnell asked whether staff already reviews site plans for fill; staff replied that site-plan review is routine and the ordinance language clarifies the approval authority. Commissioner Logan Davis asked about the 8-inch diameter threshold used in the multi‑trunk tree calculation; staff said the threshold aligns with how multi‑trunk trees are counted toward the designated size that triggers grand‑tree protections.
The commission voted to recommend the ZLDR amendments; the chair said County Council will hear the package at its public hearing on Aug. 26, 2025 and again before the council's Planning and Public Works Committee on Sept. 11, 2025.
Discussion vs. decision: staff proposed the text changes (discussion/direction) and the commission voted to recommend the amendments (formal action); the recommended amendments will move to County Council for final consideration.
Background: staff said the changes are intended to implement goals in the comprehensive plan to encourage resilience and to harmonize standards with adjacent jurisdictions.
Next steps: County Council public hearing on Aug. 26, 2025, and committee review on Sept. 11, 2025; council readings will determine final adoption.