Real estate sign not exceeding sixteen (16) square feet in area and six (6) feet in height, and which advertises the sale, rental or lease of the premises upon which the sign is located.

Wall mounted home occupation and personal name signs not exceeding two (2) square feet in area, and indicating only the name and occupation of the resident.

Signs denoting the architect, engineer or contractor when placed upon work under construction, and not exceeding ten (10) square feet in area.

Professional occupation signs denoting only the name and profession of an occupant in a commercial building, or public institutional building, and not exceeding four (4) square feet in area for each occupant therein.