In Residential Districts no fence shall be more than seven feet in height in any rear or side yard or four feet in height in any front yard; provided further that on a corner lot nothing shall be erected, placed, planted, or allowed to grow in such a manner as to materially impede vision within the sight triangle zone, which is defined as a height of between 2.5 feet and 10 feet above the established curb grades of the intersections streets within the triangle formed by the curb lines of the intersection streets and the line joining points a distance of 25 feet on each curb line from their point of intersection (Figure 1).

In Commercial and Industrial Districts, no fence shall be more than nine feet in height in any yard.