City of Tucson - Solar Readiness and EV-Ready Sustainability Codes
Solar Readiness
Tucson adopted an ordinance in June 2008 that requires all new single-family homes and duplexes in Tucson to be "solar-ready." The ordinance requires all new homes either to have a photovoltaic (PV) and solar water heating system installed, or to have all the necessary hardware installed so that a system can easily be installed at a later date.
To comply with this requirement, new homes must either have a complete solar water heating system installed or comply with one of two solar stub-out options. Option One requires the installation of two insulated pipes and a suitably sized conduit