Denton County, TX Solar Energy: Panel Permits (2026)

Installing solar panels in Denton County requires a building permit and an electrical permit from the applicable city or the county for unincorporated areas. The permit application typically requires a site plan showing panel placement, a structural analysis confirming the roof can support the additional load, electrical single-line diagrams, and equipment specifications. Rooftop systems must maintain required fire setbacks from roof ridges and edges as specified by the adopted fire code, typically 3 feet from the ridge and 18 inches from the edge to allow firefighter roof access. Ground-mounted solar systems must meet zoning setback requirements for accessory structures. The electrical installation must comply with the National Electrical Code (NEC) as adopted locally, including rapid shutdown requirements for rooftop systems per NEC 690.12. Interconnection with the local utility (Oncor distribution, with various retail electric providers) requires a separate application and approval process. Texas operates under a competitive retail electricity market in Denton County, and net metering or buyback rates vary by retail electric provider. The City of Denton operates its own municipal electric utility (Denton Municipal Electric) and has its own interconnection and buyback policies. Texas has no state sales tax exemption for solar equipment, but the federal Investment Tax Credit applies. Property tax exemptions for solar installations are available under Texas Tax Code 11.27, which exempts the added value of solar or wind devices from property taxation.