25 Del. C. § 2243: “For Sale” signs.

Any unit owner shall have the right to display a “For Sale” sign, measuring up to 12 inches by 18 inches (12″ X 18″) on the exterior wall of such person’s unit or the common elements proximate to the unit. Such “For Sale” sign shall be entitled “For Sale”, and contain such information as accurately describes the unit and any applicable names, addresses and phone numbers of the person or persons who are offering the unit for sale, unless unit owners enact a covenant that prohibits this practice.

Developers may initially ban such signs for 2 years from the first sale of a unit, or until 75 percent of the units are sold, whichever comes first.