Home Additions in Round Hill, VA

The town has planning and zoning jurisdiction inside its limits. It takes land-development applications for additions and similar work and enforces the town zoning ordinance. Rezonings go to the town council.

The county Department of Building and Development issues building permits and grading permits for the entire county, and it issues zoning permits for properties outside the incorporated towns. A county approval still leaves any separate town approval in place, and the applicant still has to obtain the Round Hill town approval.

Loudoun treats a residential addition as square footage added to the house, and condominiums fall outside that definition. The application needs the owner signature, the plat for the addition, and plans that detail the structural elements. A paper filing uses three sets of plans and the house location plat. Filing is online in LandMARC or in person on weekdays. A bedroom added to a house served by well and septic also needs health-department approval. Gas permits for residential alterations and additions have required plan review since October 1, 2025. The counter is open weekdays from 8:30 until 5. Real Elite coordinates the gas trade on a Round Hill addition and does not perform that work.