Over the years, the historic tax credit program has been a critical incentive in the rehabilitation of historic buildings and by extension, in the economic revitalization of America’s downtowns and main streets. According to the National Park Service, in its lifetime, the tax credit program has generated $62 billion in construction over 38,000 projects. In 2011, historic tax credit rehabilitation work totaled approximately $4.02 billion, comprised of 937 new projects Clearly, the program has been successful.