# Washington — Septic system inspection at property sale: which states require it

For Washington, inspection required at sale? is Beginning February 1, 2027, obtain an inspection, as required in WAC 246-272A-0260 (5), by a third-party inspector authorized by the local health officer; exemptions is The local health officer may: (A) Remove the requirement for an inspection at the time of property transfer if the local health jurisdiction has evidence that the OSS is in compliance with (e) of this subsection and the OSS was inspected by a third-party inspector authorized by the local health officer; authority is WAC 246-272A-0270, verified against its source on 2026-08-18.

- **State:** Washington _(our reading, not quoted from the source)_
- **Inspection required at sale?:** Beginning February 1, 2027, obtain an inspection, as required in WAC 246-272A-0260 (5), by a third-party inspector authorized by the local health officer _(verified: appears in the quote below)_
- **Exemptions:** The local health officer may: (A) Remove the requirement for an inspection at the time of property transfer if the local health jurisdiction has evidence that the OSS is in compliance with (e) of this subsection and the OSS was inspected by a third-party inspector authorized by the local health officer _(verified: appears in the quote below)_
- **Authority:** WAC 246-272A-0270 _(verified: appears in the quote below)_

## What the source says

> (k) At the time of property transfer: (i) Provide to the buyer, all available OSS maintenance and repair records in addition to the completed seller disclosure statement in accordance with chapter <http://app.leg.wa.gov/RCW/default.aspx?cite=64.06> 64.06 RCW for residential real property transfers; (ii) Beginning February 1, 2027, obtain an inspection, as required in WAC <http://app.leg.wa.gov/WAC/default.aspx?cite=246-272A-0260> 246-272A-0260 (5), by a third-party inspector authorized by the local health officer. The local health officer may: (A) Remove the requirement for an inspection at the time of property transfer if the local health jurisdiction has evidence that the OSS is in compliance with (e) of this subsection and the OSS was inspected by a third-party inspector authorized by the local health officer;

## Source

- https://app.leg.wa.gov/wac/default.aspx?cite=246-272A-0270

Last verified: 2026-08-18. Review by: 2027-08-18.
Part of [Septic system inspection at property sale: which states require it](https://referencesource.org/septic-inspection-at-property-transfer/).