Perc Tests and Soil Evaluations in Vermont

Called here: Site Evaluation and Design (Licensed Designer) (this state no longer performs a literal perc test)

Vermont's default permit path runs through one of DEC's five regional offices, though a delegated municipality may issue permits on DEC's behalf. Identify the office for the property and confirm whether the municipality is delegated. Hire a designer whose class covers the likely system. The designer evaluates the proposed leachfield and replacement area, records test-pit soil descriptions, selects an allowed system, and prepares the application and design. Vermont uses designer self-certification, and DEC does not routinely witness each test pit, though it audits designers. Submit the application and pay the fee based on the higher water or wastewater design flow, then wait for the permit before taking a permit-triggering action. After installation, file the signed certification addressing conformity, inspection, testing, and performance.

Vermont has no current acreage exemption of any size, and a large rural parcel does not avoid permitting. The date-based Clean Slate exemption covers buildings, structures, and campgrounds substantially completed before January 1, 2007, their associated systems and supplies, and improved or unimproved lots in existence before that date. It continues only while no permit-triggering action is taken on or after January 1, 2007, so it cannot exempt new construction. The former 10-acre loophole is historical. Other rule exemptions cover narrow circumstances such as some reconstruction, primitive camps, older modifications and subdivisions, and specified leases. Have the designer or permitting office apply the current rule before relying on one.

Vermont's state application fee is separate from the designer's bill and is based on the higher water or wastewater design flow. The schedule is $306.25 at 560 gallons per day or less, $870 above 560 through 2,000, $3,000 above 2,000 through 6,500, $7,500 above 6,500 through 10,000, and $13,500 above 10,000, plus separate Minor Amendment and Minor Project fees. A typical single-family home is very likely in the $306.25 tier, but the design flow controls. Published designer pricing is thin. Hogg Hill Design advertised a $500 per-lot feasibility study, which is pre-design screening, not the full evaluation, design, and permit package. Ask two or three licensed designers what each quote includes.

The current Vermont rule does not name a winter, frozen-ground, frost, or snow restriction for digging soil-evaluation test pits. Its seasonal-high-water-table reference describes a soil condition, not a testing season. As practical context rather than a rule, backhoe access can depend on snow, mud, and other site conditions. Do not assume Vermont law creates a fixed testing season or that access will work on any chosen date. Ask the designer about field scheduling and plan preparation, and ask the regional office or delegated municipality about its current review schedule.

Vermont's Office of Professional Regulation licenses four cumulative designer classes, while DEC administers technical exams and approves continuing education. Class A covers evaluations, applications, designs, and certifications for relatively simple soil-based systems at 1,350 gallons per day or less. Class B adds pressure distribution, mounds, bottomless sand filters, and several alternatives; Class BW adds certain multi-building potable supplies without expanding wastewater scope. Class 1 is a Professional Engineer who meets the soil qualification and may cover all wastewater and potable-water systems within the engineer's specialty. Use OPR's Find a Professional tool to verify the license and match the class to the design. DEC says septic installers are not state-licensed, but the rule still requires an installation certification.

Vermont DEC Wastewater System and Potable Water Supply Program · Verify a license