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 the Loudoun County Department of Building and Development, 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 Ashburn permit goes through the Loudoun County Department of Building and Development. We pull it under our license and we hold the inspection schedule — you do not chase inspectors and you do not sign the application.
What we find in Ashburn homesAshburn is predominantly 1990s–2000s subdivision housing, and almost all of it sits under an HOA with architectural review for exterior work. The houses are modern and predictable to work in — which means the schedule risk is the HOA and permit path, not the construction. Unfinished basements are common here, so basement finishing is the most requested 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.
By submitting you agree United Developers may call or text you about your request, including by autodialed/automated means and AI voice, at the number provided. Consent is not a condition of purchase. Msg/data rates may apply. Reply STOP to opt out.
Our Ashburn crews cover Sterling, Leesburg, Brambleton, Broadlands and every ZIP in the area — 20147, 20148.
Yes. United Developers is a licensed contractor in Virginia (Class A #2705183185) and works throughout Ashburn and Loudoun County, including 20147, 20148 and nearby Sterling, Leesburg, Brambleton.
We do, under our license, through the Loudoun County Department of Building and Development. 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.
Most Ashburn projects land in the $180 – $340 / sq ft range. That is a planning range for Loudoun 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.