The County Commissioners of St. Mary’s County may impose building permit fees in an amount up to 2% of the cost of any new construction of any living units: built in St. Mary’s County; or prebuilt and brought into St. Mary’s County. The county commissioners shall set the building permit fees in December of each year. The revenue derived from this section shall be used to defray the cost to St. Mary’s County for additional educational, water, sewerage, road, sanitation, solid waste, park, or similar facilities.