The City of Chula Vista’s electrical code includes photovoltaic (PV) pre-wiring requirements that mandate all new residential units to include an electrical conduit specifically designed to allow the later installation of a PV system that utilizes solar energy as a means to provide electricity. Similarly, Chula Vista’s plumbing code requires all new residential units to include plumbing specifically designed to allow the later installation of a solar water heater that utilizes solar energy as the primary means of heating domestic potable water. To obtain a building permit, the applicant’s building plans must include both PV pre-wiring and solar water heater pre-plumbing. The building official may modify or waive these provisions if the applicant demonstrates that the requirements are impractical due to shading, building orientation, construction constraints, or parcel configuration.