To expand the expenses that may be included in calculating a Michigan Business Tax credit equal to 25 percent of the cost to rehabilitate a "historic" building or other property as defined in current law; and also expand the ability of credit recipients to assign or transfer these tax breaks to another taxpayer. The bill removes a provision that reduces the state credit by the amount of a federal rehab credit, and makes tax credits of up to $250,000 "refundable," meaning that if the credit exceeds the amount of tax owed the state will send the taxpayer a check for the difference.