An addition is the one project where zoning can stop you before design starts. We are a licensed contractor in Virginia (Class A #2705183185) — we pull the permits through Fairfax County Land Development Services, coordinate the licensed trades, and hand you a written line-item scope before demolition starts.
An addition starts with zoning, not construction: setbacks, lot coverage and height limits get reviewed before a building permit is issued, and in some neighborhoods there is a stormwater or historic review on top. Then come the footing and foundation inspections, which have to pass before backfill. This is the longest-lead permit of any project we do, and it is why we start the paperwork while the design is still being drawn.
Your Herndon permit goes through Fairfax County Land Development Services. We pull it under our license and we hold the inspection schedule — you do not chase inspectors and you do not sign the application.
The Town of Herndon issues its own permits for properties inside town limits, separate from Fairfax County, and the town has a historic district downtown with its own design review. Herndon addresses straddle the town line, so we confirm which applies before filing.
Herndon's older core is early- to mid-20th-century housing on small lots; around it is 1970s–1990s subdivision and townhome development. The older houses commonly need electrical and plumbing brought forward as part of any kitchen or bath scope.
What's includedA planning range, not a quote. Your written line-item price comes after a free on-site walkthrough. HVAC, electrical and plumbing are performed by licensed trade partners.
A written, line-item scope for your home additions project. No design fee, no obligation.
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Our Herndon crews cover Reston, Sterling, Chantilly, Oak Hill and every ZIP in the area — 20170, 20171.
Yes. United Developers is a licensed contractor in Virginia (Class A #2705183185) and works throughout Herndon and Fairfax County, including 20170, 20171 and nearby Reston, Sterling, Chantilly.
We do, under our license, through Fairfax County Land Development Services. An addition starts with zoning, not construction: setbacks, lot coverage and height limits get reviewed before a building permit is issued, and in some neighborhoods there is a stormwater or historic review on top. Then come the footing and foundation inspections, which have to pass before backfill. This is the longest-lead permit of any project we do, and it is why we start the paperwork while the design is still being drawn.
The Town of Herndon issues its own permits for properties inside town limits, separate from Fairfax County, and the town has a historic district downtown with its own design review. Herndon addresses straddle the town line, so we confirm which applies before filing.
Most Herndon projects land in the $180 – $340 / sq ft range. That is a planning range for Fairfax County, not a quote — your written price comes after a free on-site walkthrough.
Yes. The walkthrough and the written scope are free and yours to keep whether or not you hire us. There is no design fee and no consultation invoice.
The build is rarely the long part — permitting and zoning review are. Expect the approval phase to run in parallel with final design, and expect us to give you a schedule that names the permit milestone rather than hiding it. We will tell you at the walkthrough if your lot has a setback or coverage problem, because that changes the whole conversation.