18 W. Market Street, Port Penn 19731. Area variance to construct a 1,440 square foot pole barn addition to an existing 320 square foot detached garage and the dwelling has a 720 square foot footprint (on a lot less than one acre, the gross floor area of any one freestanding accessory structure shall not exceed the square footage footprint of the principal dwelling unit). Dennis Lawrence. NC10 Zoning. CD 12. (App. 2012-0733) TP 13-010.09-014.