Office of Historic Preservation, City of San AntonioAdministers guidelines for creating historic districts, regulations for exterior changes to historic structures and sites, and the process concerning applications for permits. Includes the Historic and Design Review Commission which hears cases from 26 historic districts, six River Improvement Overlay districts, over 1300 individually designated landmarks, and all public projects. The HDRC is guided by the Secretary of the Interior’s Standards for Rehabilitation and the City’s Unified Development Code.