Septic Inspection for a Home Sale: Washington's 2027 Rule, Spokane County Steps and Idaho Notes

Beginning February 1, 2027, selling a Washington property with a septic system requires an inspection by a third-party inspector the local health officer authorizes. In Spokane County the seller needs an inspection by a permitted O&M provider within 12 months, and files the report with SRHD before closing. Idaho has no matching rule in the sources used here, so confirm with the health district.

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Last reviewed: October 26, 2026

What the rule says

Washington's on-site sewage rule, WAC 246-272A-0270(1)(k), covers what an owner must do at the time of a property transfer. The owner must give the buyer all available maintenance and repair records along with the seller disclosure statement required by chapter 64.06 RCW. Beginning February 1, 2027, the owner must also obtain an inspection, following WAC 246-272A-0260(5), by a third-party inspector authorized by the local health officer, and submit the results on an approved form.

The rule gives the health officer room to adjust. The officer may remove the inspection requirement if the district has evidence that the system complies with the routine inspection requirement and was inspected by an authorized third party. The officer may also verify the results, require additional inspections, and require a compliance schedule for repairing a failure found during the transfer inspection. The plain-language overview is in Washington's 2027 septic inspection rule.

Spokane County: the steps SRHD lists

SRHD's property transfer page lays out a four-step process. The seller needs, before closing: an inspection of the septic system completed by a permitted O&M provider within the past 12 months; the tank or tanks pumped, if the inspection report recommends it; and an as-built record drawing. If there is no as-built, or the one on file is wrong, a site plan must go in with the report, and permits and fees may apply.

  1. The seller submits the inspection report to SRHD and pays the submittal fee before closing. The report includes the current sizing of the system.
  2. SRHD looks over the report and the related septic records. With no deficiencies, the report comes back with none noted. If surfacing sewage or another health hazard shows up, SRHD staff may visit the site, start enforcement, or set a compliance schedule with the current owner, and additional fees may apply.
  3. At the transfer, the seller gives the buyer the report as checked by SRHD, which is valid for 12 months from the date of inspection, along with the maintenance records and the seller's disclosure statement.
  4. The buyer should contact SRHD after the purchase closes to update ownership information, so maintenance reminders reach the right address.

SRHD says to allow up to two weeks for it to process a complete inspection form, and longer if a form is incomplete. It also says that if a seller does not fix a deficiency that is under enforcement before the sale, enforcement shifts to the buyer, who becomes responsible for resolving surfacing sewage or a health hazard. Deficiencies must be corrected as WAC 246-272A-0270 requires.

Exemptions in Spokane County

SRHD says an exemption may be approved by application and fee if the system on record was installed and its operational permit issued within the past 12 months, if a permitted O&M provider completed an O&M inspection within the last 12 months, or if the system has been properly abandoned and the structures tied into sewer. SRHD's operation and maintenance page adds a warning: failing to obtain or maintain a current operational permit may delay property transfer inspections in 2027 and after. The seller-side Spokane County transfer checklist puts these steps in order.

Stevens, Pend Oreille and Ferry counties

The Northeast Tri County Health District adopted its own on-site sewage regulation, numbered 03-2025, which repeats the state language. It requires, beginning February 1, 2027, an inspection by a certified operation and maintenance provider authorized by the health officer, and says an inspection is not required at transfer when a recent compliant inspection has already been done by such a provider. The regulation does not define recent in the sections read for this page, so ask the district what it accepts. The district posts the list of certified O&M service providers on its septic contractors page, with offices in Colville, Newport and Republic.

Idaho

Washington's rule stops at the state line. A house in Bonner, Boundary or Kootenai County falls under the Panhandle Health District and Idaho DEQ rules, and this page found no statewide Idaho transfer-inspection rule matching Washington's. Confirm the current sale requirement with the Panhandle Health District, and see the Sandpoint and Coeur d'Alene pages for the district names and lists.

What the inspection looks at

WAC 246-272A-0260(5) sets the content: tanks with baffles, effluent filters, contents, water tightness and structure; lids, accesses and risers; the system and the reserve area for signs of failure; distribution boxes; the record drawing and earlier reports; and any proprietary products according to their manuals. For a transfer, WAC 246-272A-0260(6) adds the property address, the inspection date, the permitted type and design flow for known systems, and verification that the record drawing is accurate, or a site plan showing every component relative to structures and site features. The routine inspection page has the same list in more detail.

Tips for sellers and buyers

What changes the price

This site does not quote prices. A transfer inspection is priced by system type, tank count, lid depth, access, travel and any pumping the report recommends. The district also charges its own fee to file the report. See the pumping cost guide.

Reasons to trust this page

Frequently Asked Questions

When does Washington's septic transfer inspection start?

February 1, 2027. Beginning that date, WAC 246-272A-0270(1)(k) requires the owner to obtain an inspection by a third-party inspector authorized by the local health officer when a property with an on-site sewage system is transferred. The results go to the health jurisdiction on an approved form. Local districts add their own steps and fees.

What does the seller need in Spokane County?

SRHD lists an inspection by a permitted O&M provider within the past 12 months, pumping if the report recommends it, and an as-built drawing or a site plan. The seller submits the report and the fee to SRHD before closing, then gives the buyer the SRHD-checked report, maintenance records and the seller disclosure statement.

Can a recent routine inspection satisfy the transfer requirement?

Possibly. The rule lets the health officer remove the requirement when the district has evidence of a recent compliant inspection by an authorized provider. SRHD defines it through an O&M inspection within the last 12 months, by application and fee. Northeast Tri County does not define recent in the sections read, so ask.

Does Idaho require a septic inspection when selling a house?

The sources used for this page show no Idaho rule matching Washington's. An Idaho house is under the Panhandle Health District. Confirm the current sale requirement with the district, and ask for the maintenance records and any permit drawing for the system.

How long does SRHD take to process a transfer report?

SRHD says to allow up to two weeks for a complete form, and longer if the form is incomplete and needs follow-up. Since the report and fee must reach SRHD before closing, ask the inspector when the report will be ready and book the visit early in the listing.

Sources

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