In required front yards. Walls, fences, or hedges not exceeding four feet in height, shrubs and trees, providing there is a substantially unobstructed view between four feet and 10 feet above ground level, open porches not more than one story or 14 feet in height, extending eight feet or less into the yard, provided no porch shall be constructed closer to the side lot than the required width of the side yard, enclosed vestibules not exceeding 25 square feet and not projecting more than five feet into the yard, and signs as permitted by other provisions of this Zoning Code.
Exception: On corner lots, properties with two or more front yards, the maximum height of fences, hedges, and shrubbery shall be three feet in height.