Hartford permits building-mounted solar and roof-mounted wind energy systems as an accessory structure by right within all jurisdictions, subject to use-specific regulations. Freestanding wind and solar energy systems, as well as solar-collecting canopies over parking lots, are permitted as accessory structures by right in a limited number of jurisdictions and are likewise subject to specific use regulations. Each renewable energy system in the ordinance is regulated by categories such as quantity, height, location, output or capacity, height, setback, installation method, and building material. A few other categories are tailored for individual systems, such as the permitted location of free-standing windmills within the City.