They may not be metallic. You may erect any shed that is 100 square feet or less without permission from the Architectural Control Committee. If you want to build a storage building/shed greater than 100 square feet you must submit your plans to the Architectural Committee for approval prior to starting construction. Also, buildings larger than 100 square feet must match the architectural style of the home and be a minimum of 60% brick, stone or masonry that matches your home.