The BHAC guidelines include requirements for the maintenance and repair of original and historically significant architectural materials and features at Beacon Hill when possible and, if this is not possible, the BHAC requires that new material “must match the materials being replaced in composition, design, color, texture and other visible qualities. The only exception to deviating from obtaining a permit for construction and alterations on Beacon Hill is if the City Building Commissioner certifies that an alteration, construction, or demolition is necessary in the interest of public safety due to a unsafe or dangerous condition with a building or other architectural feature on Beacon