Boundaries of the French Quarter The most common definition of the French Quarter includes all the land stretching along the Mississippi River from Canal Street to Esplanade Avenue (12 blocks) and inland to North Rampart Street (seven to nine blocks). It equals an area of 78 sq. blocks. Some definitions, such as city zoning laws, exclude the properties facing Canal Street, which had already been redeveloped by the time architectural preservation was considered, and the section between Decatur Street and the river, much of which had long served industrial and warehousing functions. Any alteration to structures in the remaining blocks is subject to review by the Vieux Carré Commission, which determines whether the proposal is appropriate for the historic character of the district. Its boundaries as defined by the City Planning Commission are: Esplanade Avenue to the north, the Mississippi River to the east, Canal Street,Decatur Street and Iberville Street to the south and the Basin Street, St. Louis Street and North Rampart Street to the west.