For residential lots, only trees 16 inches in diameter (measuring trunk 4 1/2 feet from the ground) require a permit from the Town of Mount Pleasant. Residential trees that are exempt from a permit, but per § 156.225 still require a tree protection zone on site plans, are those under 16 inches in diameter as well as the following tree species: pine, sweet gum, callary pear, river birch, mimosa, chinaberry, Chinese tallow, camphor tree, and white poplar trees. Trees located within special buffer areas, critical areas, easements, or rights-of-way may be protected regardless of size or species.