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About GridPermit

GridPermit is an independent educational platform built to help U.S. homeowners understand residential solar permitting: what permit authority handles it, what documents and inspections are required, and which utility governs interconnection, for their specific city. We also run a separate, California-only illustrative savings calculator.

Solar Permit Guides

Our core product is a set of source-linked solar permit guides, with research on file for all 50 states. Every fact on a published guide links directly to the official source it came from and shows when it was last verified. See our Methodology for exactly how a guide earns publication. Coverage depth varies by location; California is currently our most complete state, and we say so plainly on our state-by-state coverage page rather than implying more national completeness than the data supports.

Educational Purpose (Calculator)

Separately, GridPermit provides a simple, clearly-labeled illustrative system-size estimate for California ZIP codes, based on standardized placeholder assumptions, not real utility rate data or property-specific analysis. We say so plainly on every page rather than implying more precision than the tool actually has; see our Methodology for the exact numbers used. Our goal is to offer transparent informational tools, with optional links to independent third-party solar marketplaces.

Independent Referral Model

GridPermit is not a solar installer, contractor, engineering firm, public utility, or government agency. We do not provide engineering calculations or binding price quotes. On eligible California pages, GridPermit may show a clearly disclosed paid referral to CompareSolarPrices. Other pages may link to independent third-party resources such as EnergySage without tracked compensation. Each commercial or referral link is labeled according to its actual status on that page.