Grays Harbor County Septic Permits: The Rule That Is About to Change

Sourced from Grays Harbor County’s 2026 Environmental Health fee schedule (BOH Resolution 2024-02), the county’s on-site sewage section, its environmental health FAQ, its Shellfish Protection District page, and chapter 246-272A WAC — last checked August 2026. Where we could not source something, we say so.

The sentence on the county’s website, and the one that is missing

Grays Harbor County’s environmental health FAQ answers the point-of-sale question directly:

That is accurate, and it is more than most counties bother to say. Four Washington counties — Clallam, Jefferson, Whitman and Asotin — do require one today, and Snohomish joins them on November 1, 2026. Grays Harbor is genuinely not among them.

⚠️ But we could not find any mention of February 1, 2027 anywhere on the county’s septic pages. On that date, WAC 246-272A-0270 makes a property-transfer inspection the statewide baseline — including here. The phrase that matters in the county’s own answer is “at this time.”

The practical read for a Grays Harbor seller: an answer that is true today, published without the expiry date attached. If you are selling before February 2027, nothing is required of you. If you are selling after it, the requirement arrives whether or not the FAQ has been updated by then. And if you are somewhere in between — listing in late 2026, closing in early 2027 — that is exactly the transaction that gets caught out. Ask the department where your closing date lands before you assume the FAQ still covers you.

The county’s own FAQ makes the adjacent point worth repeating: lenders may require an inspection regardless of what the county does. A VA, FHA or conventional lender can make it a condition of the loan, and no county rule overrides a lender’s underwriting.

What Grays Harbor charges

From the 2026 schedule adopted under BOH Resolution 2024-02:

Two features of this schedule are worth pulling out.

The repair discount is real. A verified failure repaired within six months is charged at half the base permit fee — so roughly $516 against a $1,032 conventional permit. That is a deliberate incentive to fix a failing system promptly rather than nurse it, and among the better repair terms in the state. Okanogan, by contrast, charges repairs at the full new-system price.

The fees index themselves. The schedule states that fees are automatically adjusted each January 1 by the increase in the August Consumer Price Index, capped at 3.5%. Grays Harbor is the only county in our Washington research that publishes an automatic escalator like this. It means two things: the numbers above are current for 2026 and will drift up on their own in January, and you never have to wonder whether a schedule is stale — it is designed not to be.

The evaluation to ask for when you are selling anyway

Even without a county requirement, sellers and lenders regularly want a system evaluated. Grays Harbor prices that as an Existing System Evaluation (ESE), used for loan certifications and compliance:

That $310 is the closest published figure anywhere in Washington to what a 2027 transfer inspection will actually cost through a county — and worth knowing now, because it is the number a lender-driven inspection will run you today. Note the pattern in the middle row: adding a water sample to the septic evaluation costs $103 more, which is $104 cheaper than buying the two separately. Grant County has a similar bundle, priced even more aggressively.

SmartGov only — paper is finished

Grays Harbor has moved on-site sewage permitting entirely online. The county states that applications “are now accepted online via our permit portal (SmartGov) and need to be submitted electronically.” Paper submissions are no longer accepted, with drawings the only exception.

Every new application also requires design plans from a Washington State licensed on-site designer or professional engineer. We found no homeowner design pathway described anywhere on the county’s pages — and given the flat requirement for licensed plans, do not assume one exists here the way it does in Okanogan or Asotin.

Digging your test holes right the first time

The county is specific, and the specifics are the kind that cost you a return visit if you get them wrong:

• Two test holes, in or adjacent to both the primary and the reserve drainfield areas
• 2 feet wide and 6 feet deep
• A ramp for inspector access — not an optional courtesy
• Flagging tape on all property corners and both test holes
• Call 8-1-1 before digging — required for any work deeper than 12 inches

A reinspection is $176. Two holes dug to the wrong spec is the cheapest expensive mistake on this page.

Aerobic units come with a contract for life

Among the five system types the county describes — conventional gravity, pressure distribution, mound and sand filter, Glendon biofilter, and aerobic treatment units — one carries an obligation that outlives the installation. An aerobic treatment unit requires an operation and maintenance agreement with a third party for the life of the septic system.

That is a permanent recurring cost attached to the system, not a one-time permit condition. If a designer proposes an ATU because the site will not take anything simpler, price the O&M contract into the decision, not just the install.

🔴 The priced program with no published rules

Here is the oddity we could not resolve. The 2026 fee schedule prices an “Area of Special Concern” O&M review at $310, plus an O&M report review at $52 digital or $104 paper. So the county charges for it.

The county’s Shellfish Protection District page — the obvious home for those rules — reads “Content under construction.”

We could not find the boundaries of any Area of Special Concern, which properties fall inside one, what the review requires, or how often it applies. If your property is near shellfish waters — and much of this coastline is — that $310 line may apply to you, and the department is currently the only place to find out. Call and ask directly rather than assuming the silence means you are outside one.

What we could not source

• Any mention of the February 1, 2027 requirement on the county’s septic pages, as of August 2026.
• Area of Special Concern boundaries or rules — priced but unpublished, see above.
• Inspection or pumping frequency by system type. The county describes five system types without attaching a maintenance schedule to any of them. The statewide pattern under WAC 246-272A is gravity every three years and all other types annually; confirm yours with the department.
• Whether homeowner design or installation is permitted. Licensed design is required for new applications; no homeowner path is described and none is explicitly ruled out.
• How many on-site systems are in the county. Not published anywhere we could find.

The practical bits

Note the closed hour over lunch — the office splits its day, and a call at 12:30 will not reach anyone.

Sources

• Grays Harbor County, 2026 Environmental Health fee schedule, BOH Resolution 2024-02 — PDF
• Grays Harbor County, On-Site Sewage Section — graysharbor.us
• Grays Harbor County, Environmental Health frequently asked questions — graysharbor.us
• Grays Harbor County, Shellfish Protection District — graysharbor.us
• WAC 246-272A-0270, on-site sewage system inspection at property transfer