Sullivan's Island is separated from Mount Pleasant by the Intracoastal Waterway to the north. Breech Inlet separates Sullivan's from the Isle of Palms and the Atlantic Ocean and Charleston Harbor make up the rest of the surrounding waters. This old beach town is known for its rustic charm and its Civil War era history. Generally speaking, this is a community of single-family, owner-occupied homes. The town enforces a strict rental policy.