Panel Permits: Herndon vs Vienna
How do panel permits rules compare between Herndon, VA and Vienna, VA?
Herndon has fewer restrictions than Vienna.
Herndon, VA
Fairfax County
Herndon permits residential solar panel installation with building and electrical permits. Rooftop solar typically receives expedited review. Virginia Solar Freedom Act §67-701 prevents HOAs from unreasonably restricting solar. Net metering is available through Dominion Energy up to 25 kW residential.
View full Herndon rules →Vienna, VA
Fairfax County
Solar permits in Vienna require a building permit for structural review, an electrical permit for the DC and AC components, and an interconnection agreement with Dominion Energy. Most residential systems are reviewed over the counter or within a few weeks and must meet Virginia USBC wind and fire code provisions.
View full Vienna rules →Key Facts Comparison
| Fact | Herndon | Vienna |
|---|---|---|
| Fact | Building and electrical permits required | Building and electrical permits required |
Highlighted rows indicate differences between cities.
Herndon FAQ
Can my HOA deny rooftop solar?
No, the Virginia Solar Freedom Act §67-701 prevents HOAs from unreasonably restricting solar. They can impose reasonable restrictions on location and appearance.
How long does solar permitting take in Herndon?
Typical residential rooftop solar permits are issued within 5-10 business days. Complete submittals with structural verification speed the process.
Vienna FAQ
How long does solar permitting take in Vienna?
Most residential rooftop projects clear permit review in a few weeks. Ground mounts and systems with battery storage take longer due to additional code review.
Is there a local incentive beyond net metering?
Vienna does not currently offer a dedicated local solar incentive. State-level incentives and the federal Investment Tax Credit remain the primary financial drivers.
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