Unincorporated Williamson County has no zoning and does not issue building or zoning permits for rooftop solar. Installations follow the National Electrical Code and require an interconnection agreement with the serving utility, such as Oncor or Pedernales Electric Cooperative.
Because Texas counties cannot zone, there is no county solar permit or setback rule for panels in unincorporated Williamson County. Homeowners still connect through their electric provider - Oncor, Pedernales Electric Cooperative, or a municipal utility - under an interconnection agreement and net-metering or buyback terms set by that provider. Wiring must meet the National Electrical Code, and licensed electrical work is required. Inside city limits such as Georgetown, Round Rock, Cedar Park, Leander, and Hutto, the city building department issues the solar permit instead.
Connecting a solar system to the grid without an interconnection agreement violates utility rules and can force disconnection. Unlicensed electrical work carries state penalties.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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