No wall or fence, except retaining walls, shall be erected or altered in the front yard of any lot in any residential district to a height in excess of four feet, or in the side or rear yard in any residential district to a height in excess of six feet. All walls and fences, including retaining walls, shall meet the requirements of § 236-34 for corner clearance. Walls or fences, except retaining walls, erected on corner lots shall not be more than four feet in height in the front or side yard in any residential district.

No fence or wall shall be erected of barbed wire or topped with metal spikes. No fence other than in an industrial zone shall be constructed of any material or in any manner which may be dangerous to persons or animals.

Where any fence is discernible as having a finished or good side, said fence shall be installed with the finished or good side facing the abutting property.

Minor site plan approval shall be required for all fences in the Industrial District which do not meet the requirements of this section.

No retaining wall shall be erected in a residential district to a height in excess of four feet. Construction of retaining walls in a residential district for the purpose of regrading a property by terracing shall be limited to a maximum of two- to four-foot-high retaining walls with a minimum of four feet horizontal spacing between the faces of the two walls. Additional terracing of more than two walls will not be permitted without a minimum of 20 feet horizontal separation between terracing wall pairs. Retaining walls shall not be constructed in locations that would impact the disturbance of steep slope areas as regulated by § 236-21.2.