A Building Permit is required for an owner or contractor of a property to construct any residential building with a floor area greater than 120 square feet. They need lots to be at least 14,400 square feet and allow up to 12 units per acre.This area is good for attached and detached homes. Plans shall be clear, legible, and of sufficient size (suggested size, 24 in x 36 in. , suggested scale, ¼ in.