D.C. Office of the Chief Technology OfficerZoning Downtown Subareas. The review of the Zoning Regulations of 1958, as amended, was a project that began in 2007. The new Zoning Regulations of 2016 were published on March 4, 2016 and effective on September 6, 2016.The purposes of the Downtown (D) zones (D-1-R, D-2, D-3, D-4, D-4-R, D-5,D-5-R, D-6, D-6-R, D-7, and D-8) are to provide for the orderly development and use of land and structures in areas the Comprehensive Plan generally characterized as:(a) Central Washington; or(b) Appropriate for a high-density mix of office, retail, service, residential, entertainment, lodging, institutional, and other uses, often grouped into neighborhoods with distinct identities.Detailed information at http://dcoz.dc.gov.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/e907522e847a451ba514251f98270380_31engOpen Data DCPublicZoning Downtown Subareas [District of Columbia--Washington]Web servicesDistrict of Columbia--WashingtonDistrict of ColumbiaLast Modified: 2016-07-21