An ordinance (BL2025-757) by the Metropolitan Government of Nashville and Davidson County authorizes specific building material restrictions and requirements for the River North Urban Design Overlay, encompassing 165.21 acres across multiple streets including Cowan Street, Waterside Drive, Oldham Street, North 1st Street, River North Boulevard, Spring Street, and Cowan Court. This ordinance mandates that building facades visible from public spaces or interstates must use high-quality materials from an approved list. The approved materials list includes masonry, masonry panels, textured metal, metal paneling, precast concrete, precast concrete panel, and spandrel glass (for upper stories only), or substantially similar materials. This ordinance is part of a larger urban design overlay (BL2025-756). The bill was filed on 2/20/2025, approved by the Planning Commission on 1/9/2025 with conditions, and passed by the Metropolitan Council on its third reading as amended on 4/15/2025, becoming effective on 4/25/2025.