Solar panel installation in Herndon — roof first.

Often, and it is far cheaper to find out first. A rooftop array is designed to stay put for decades, so mounting one on a roof with a few years left means paying to remove it, reroof, and reinstall it. United Developers inspects the roof free, typically within 24 hours, and gives you a photo report of what it actually has left — yours to keep either way. If the roof is fine, we will say so.

Permits for work here run through Fairfax County Land Development Services. For a rooftop array, expect a building permit for anything fastened to the roof structure and a separate electrical permit for everything downstream of it — the electrical permit pulled by the licensed electrician on the job, which is how Maryland and Virginia jurisdictions generally require it. We confirm the exact permit set for your parcel before anything is filed. Permit authority and code requirements are summarized for general guidance and can change; we confirm the current requirements for your specific parcel before work begins.

That gets checked before anything is designed, not after. On older Fairfax County housing stock we routinely find undersized service, and if yours is one of them the panel has to be addressed first. A licensed electrician on the job confirms your service capacity and does the electrical work — United Developers holds a home improvement and general contractor licence (MHIC #111971, Virginia DPOR Class A #2705183185), not an electrical licence, and we do not pretend otherwise.

We do not publish either figure, here or anywhere else on this site. The cost depends on your roof — its planes, pitch, condition and whether it needs replacing first — and the payback depends on a year of your own electricity bills and on incentive programmes that change. You get an itemised written scope and price after a free on-site assessment. Be wary of any number quoted before someone has been on the roof.

Yes — the 20170, 20171 ZIPs and the rest of Fairfax County, plus neighbouring Reston, Sterling, Chantilly, Oak Hill. United Developers works Maryland and Virginia only; our office is at 4915 St Elmo Ave Ste 403, Bethesda, MD 20814.