About West Sound Septic Pros

West Sound Septic Pros is a free, independent guide to septic work across Thurston, Kitsap, and Mason counties, built around the rule that catches many home sellers off guard: the septic inspection required when a property changes hands.

What this site is, and what it is not

West Sound Septic Pros is two things: a plain-language reference on West Puget Sound septic rules, and a free way to reach an independent local septic professional. It is not a septic contractor, not a certified inspector, and not a government office. All work, from a transfer evaluation to a full drainfield, is performed by independent local professionals, and the choice of who to hire always stays with you.

The reference side exists because the rules here are unusual, and unusually consequential. A seller in Olympia, Bremerton, or Shelton can watch a closing date slip because nobody told them a county inspection or a maintenance record stood between the offer and the deed.

Why the transfer inspection leads every page

Thurston County has required a Time of Transfer Evaluation Report before a septic-served property sells since September 1, 2010, and its Environmental Health division manages an estimated 55,400 on-site systems (county fact sheet, PDF; November 2025 management plan update, PDF, p.15). Kitsap Public Health's Board Ordinance 2025A-01, effective March 17, 2025, directs sellers to obtain a property conveyance inspection before the final sale (ordinance document page). Mason County works through records: under Chapter 6.76 of the county code, certified professionals file every inspection and pumping report with the county, and those records surface at sale time (county program page). And on February 1, 2027, the revised Chapter 246-272A WAC takes an inspection-at-transfer requirement statewide, per the Washington State Department of Health.

The full walkthrough, county by county with dates and sources, is the Washington time-of-sale septic guide.

How the information is checked

Every rule on this site carries a date and a source, and the sources are county and state documents first: Thurston County's program fact sheet and its November 2025 on-site sewage management plan update, Kitsap Public Health's ordinance and program pages, Mason County's environmental health pages, and the Washington State Department of Health. Cost figures stay qualitative unless a published Washington source carries them, and those figures are labeled contractor-published. When a detail cannot be confirmed against an official page, it stays off the site.

How the matching pays for the site

We are paid a referral fee by the professional we match you with, never by you, and that fee does not change your price. The full explanation is on how we make money.

Ready to start? Get matched, browse the services, or find your city in the service areas.