Johns Island Council proposes new tree protection and mitigation guidelines for development

The Charleston County Planning Commission convened on May 12, 2025, to discuss significant changes to tree protection regulations as part of a development agreement. The meeting focused on proposed amendments to the definition of protected trees and the conditions under which grand trees and protected trees may be removed or encroached upon.

The first item on the agenda addressed the proposed changes to the protected tree definition. The commission reviewed a request to allow developers to remove or encroach upon grand trees and protected trees without needing approval from the Board of Zoning Appeals (BZA), provided that mitigation measures are implemented.

Mitigation requirements were outlined, stating that for trees removed, mitigation must occur on an inch-per-inch basis for Grade A and B trees, with a minimum size of 2.5 inches in caliper. For Grade C trees, the zoning and planning director will determine if mitigation is necessary based on the condition of the tree. Mitigation can involve planting replacement trees either on-site or off-site on Johns Island, or through contributions to a tree fund designated for planting efforts on the island.

Additionally, trees that are encroached upon by more than 25% will require monitoring by an arborist for a minimum of five years. If these trees do not survive, they must be mitigated according to the previously mentioned guidelines.

The commission also discussed the approval process for encroachments. Encroachments of up to 35% of the protected area may be permitted with a tree preservation plan approved by the zoning and planning director, developed by a certified arborist. However, any encroachments exceeding 35% will necessitate BZA approval. The Architectural Review Board (ARB) will also have the authority to approve removal and mitigation requirements for trees that do not fall under the categories of grand or protected trees.

In conclusion, the meeting highlighted the commission's efforts to balance development needs with environmental protection, particularly concerning tree preservation on Johns Island. The proposed changes aim to streamline the approval process while ensuring that adequate mitigation measures are in place to protect the local ecosystem. Further discussions and decisions on these proposals are expected in upcoming meetings.