Perc Tests and Soil Evaluations in Virginia

Called here: Onsite Soil Evaluation (OSE/AOSE)

Since August 2019, Virginia has required that virtually all onsite sewage permit applications be accompanied by work from a private, licensed evaluator; the Virginia Department of Health's own evaluation service is limited to owners who qualify under income or hardship guidelines and file a petition. The permit chain runs: (1) you hire a licensed evaluator, who digs test pits and produces a soil evaluation (and sometimes a design); (2) the application goes to your local or district health department, not a state office; (3) the health department reviews the submission and can order an actual percolation test if it questions the evaluator's estimated rate; (4) the construction permit is issued, formally by the State Health Commissioner but administered locally; (5) after construction, the evaluator or certifying PE inspects the installed system and files a signed inspection report.

Virginia also offers a faster, narrower product for buyers who want to know whether land can support a septic system before committing to a purchase or a design: a letter in lieu of a permit. When a licensed evaluator's evaluation supports the request, Virginia law requires the state to issue that letter within 20 working days of the application filing date. The letter does not require a system design and is not confirmation the parcel is otherwise buildable (zoning, access, well approval, and setbacks sit outside its scope), and the state can require its own field check if there has been a substantial, intervening change in site conditions since it issued.

The evaluator's fee is private and market-set: Virginia firms report hand-dug test holes running roughly $200 to $1,500, and excavator-dug pits from about $500 up to $3,000 or more, with typical jobs described by one Central Virginia firm as running several hundred dollars for a single test site. The state permit fee is fixed and published: $425 for a construction permit with no evaluator/engineer documentation attached, $225 when that documentation is attached and the system is under 1,000 gallons per day, and $1,700 for a combined well-and-septic permit over 1,000 gallons per day with documentation attached. These are two separate charges to two separate parties; ask for an itemized quote.

Virginia's evaluation method reads mottling and soil structure, which are permanent soil features, not a live water measurement, so evaluators can generally read a seasonal high water table's mark in the soil color in dry conditions as well as wet ones (practices can vary locally). If the health department orders an actual percolation test as a secondary check, that procedure itself allows testing during dry periods by building in extra presoak time when the soil has cracked.

The person who signs off on a Virginia soil evaluation must hold a state license as an onsite soil evaluator, issued under Chapter 23 of Title 54.1 of the Virginia Code by the Board for Waterworks and Wastewater Works Operators and Onsite Sewage System Professionals. Virginia issues four license classes split along two axes: Journeyman vs. Master, and Conventional vs. Alternative system types. A journeyman must work under a master evaluator's direct supervision; a master can sign off independently. The health department will only accept a design certified by a licensed onsite soil evaluator, or by a professional engineer working in consultation with one, so confirm a license is current and covers your system type before hiring.

Board for Waterworks and Wastewater Works Operators and Onsite Sewage System Professionals (Virginia DPOR) · Verify a license