Buildings shall avoid long, monotonous, uninterrupted walls or roof planes. Building wall offsets, including projections such as canopies and recesses, shall be used in order to add architectural interest and variety and to relieve the visual effect of a simple, long wall. Similarly, in the case of a pitched roof, roofline offsets, dormers or gables shall be provided in order to provide architectural interest and variety to the massing of a building and to relieve the effect of a single, long roof.