Washington State · Skagit County

Skagit County Septic Guide: Permits, Inspections & Rules

Skagit County Public Health runs the county's On-Site Sewage Program, covering an estimated 20,000-plus septic systems from Guemes Island to the Samish and Skagit valleys. The county's own code already requires an O&M inspection before a property changes hands, years ahead of the state's 2027 rule. Here's how permitting, fees, and the ongoing inspection duties actually work.

Independent research, checked against Skagit County primary sources on July 22, 2026.

This page is general information about Skagit County's septic rules. It's not legal advice. Confirm current requirements for your specific property with Skagit County Public Health or a licensed professional before you rely on anything here.

Who Permits Septic Systems in Skagit County

The Environmental Health Division of Skagit County Public Health runs the On-Site Sewage, or OSS, program. That's the office that issues permits, sets inspection schedules, and enforces the local code.

The program's public page is the starting point for most homeowners, with links to forms, the fee schedule, and the county's septic-provider list. (skagitcounty.net — On-site Sewage program, accessed July 22, 2026)

The governing document is Skagit County Code (SCC) Chapter 12.05, "On-site Sewage." The county's page for the chapter states it was updated effective October 1, 2025. The full code runs as a single PDF. (skagitcounty.net — SCC 12.05, On-site Sewage (PDF), accessed July 22, 2026)

What the October 2025 update actually changed isn't clear from the PDF alone. The ordinance history markers inside the code document (Ord. O20160001, O20110012, O20070010) suggest most of the provisions covered on this page, including the property-transfer inspection rule, predate the October 1, 2025 effective date. The document doesn't separate out what the 2025 revision itself changed. If a specific provision matters for your situation, confirm the current wording with Environmental Health directly.

Permit and design applications go through the county's Civic Access self-service portal, where you can start an application, check status, and pay fees online. (skagitcountywa-energovweb.tylerhost.net — Civic Access self-service portal, accessed July 22, 2026)

For how this local code sits inside the statewide framework, see our Washington Septic Regulations guide. Skagit is one of twelve Puget Sound counties required to maintain its own local on-site sewage management plan on top of the state rule, and the point-of-sale rule covered further down this page is a direct result of that local layer going further than the state floor.

What Permits Cost in Skagit County (2026 Rates)

Skagit County's OSS fee schedule took effect February 1, 2025, and was built with pre-set step increases for 2026 and 2027 already written in. The 2026 column below is what's charged as of today. (skagitcounty.net — Health Department fee schedule, accessed July 22, 2026)

OSS permit and service fees, 2025–2027
Fee20252026 (current)2027
Design review – New System (up to 2 revisions)$600$620$640
Design review – Repair (up to 2 revisions)$550$570$580
Design review – Redesign$430$445$460
Design review – Renewal of Expired Design$260$270$280
Site Evaluation (1–2 evaluations, same site/visit)$400$410$420
Additional evaluation, same site (after first 2)$125$130$135
New Tank Permit$280$290$300
Wet Season Review (up to 6 visits)$500$515$530
Reinspection$360$370$380
Abandonment$125$130$135
Homeowner Installation permit$480$495$510
OSS Installer / Pumper / O&M Specialist certification$260$270$280

Non-residential establishments with an OSS also pay a supplemental annual charge, roughly $115 to $280 in 2025 depending on how many systems the establishment operates. Check the fee schedule page above for the current-year table before budgeting a commercial project.

These figures cover what the county charges to review, permit, and inspect a system. They don't include what a contractor charges to actually design, install, or pump one. For those ranges statewide, see our Septic Installation Cost in Washington and Septic Pumping Cost in Washington guides, then add the Skagit County line item that matches your project.

Operation & Maintenance: How Often Skagit County Requires Inspection

The base standard comes from the state rule, WAC 246-272A-0270, which Skagit adopts by reference. County code then adds its own requirements on top for specific system types and property uses.

Minimum O&M inspection frequency by system type
System typeMinimum inspection frequency
Simple gravity system (tank + gravity drainfield only)At least once every 3 years
All other systems (pressure distribution, sand filters, ATUs, other treatment components)At least once a year
Systems with proprietary treatment products (SCC 12.05.160(1))Annually, by a certified O&M specialist — or more often if the Health Officer requires it

(app.leg.wa.gov, WAC 246-272A-0270. skagitcounty.net, SCC 12.05 (PDF). Both accessed July 22, 2026.)

SCC 12.05.163 sets a separate, mandatory annual inspection requirement, regardless of system type, for a specific list of non-residential uses: food service establishments, campgrounds, mobile home parks, non-pool water recreation facilities, vault toilets and dump stations, transient accommodations and short-term rentals, schools and childcare facilities, group homes, nursing and treatment centers, and other non-residential establishments. If a property falls into one of those categories, the every-3-year gravity option doesn't apply.

Homeowners can self-inspect a gravity system, but only if every condition below is met. Under SCC 12.05.160(4)(a), a homeowner may personally inspect their own gravity system in place of hiring a certified provider, if: a certified record drawing or site plan is on file with the county; the drainfield sits at least 200 feet from marine water and at least 100 feet from surface water; a certified provider inspected the system within the last 3 inspection cycles; and the homeowner has completed the county's Septics 101/201 training. (skagitcounty.net — Septics 101/201 training, accessed July 22, 2026)

Whoever performs the inspection, the paperwork runs on a clock. The certified O&M specialist or pumper has to file the report with the Health Officer, and with the owner (and buyer, at transfer), within 30 days of the inspection. If the inspection turns up a suspected system failure, that has to be reported within 7 days instead.

Selling or Buying? Skagit Already Requires an Inspection at Transfer

Washington is rolling out a statewide septic inspection requirement at property sale, but it isn't active yet anywhere in the state. Skagit County didn't wait. SCC 12.05.160(2) already requires one today.

The code text, exactly as written: "Before any property transfer, an operations and maintenance inspection must be completed by a certified O&M specialist, except when a complete O&M inspection has been conducted within six months prior to the property transfer by a certified O&M specialist."

In practice, the county's real-estate transfer program page breaks that down into three roles. (skagitcounty.net — Real estate transfer requirements, accessed July 22, 2026)

Seller's obligation: arrange the O&M inspection, dated within 6 months of closing, and give a copy of the completed report to both the buyer and the Health Officer.

Buyer's right: review the completed inspection report before closing.

The report requirement also ties into the standard Washington Seller Disclosure Statement, Form 17, required under RCW 64.06 for any home sale in the state. A county-published list of certified O&M providers who can perform the transfer inspection is available as a PDF. (skagitcounty.net — Certified septic providers list (PDF), accessed July 22, 2026)

This local rule is separate from, and already ahead of, the statewide inspection-at-sale requirement that starts February 1, 2027. That statewide rule will apply everywhere in Washington, including counties with no local point-of-sale rule of their own today. Skagit County residents are effectively already living under a version of it. For how the statewide rule works once it takes effect, see our Selling a House With a Septic System in Washington guide.

Finding Your Septic Records

Before you budget a repair, schedule the transfer inspection, or list a house, it helps to know what the county already has on file for your system.

The county's free public tool is Septic Search. No login is required, and you can search by owner name, property address, parcel number, or permit number. (skagitcounty.net — Septic Search, accessed July 22, 2026)

What each record actually contains isn't fully clear without running your own search. The tool's page doesn't specify whether a given record includes a scanned as-built drawing you can view online or only permit metadata. Run a search for your own parcel to see what's actually attached, and contact Environmental Health directly if the record looks incomplete.

Certified O&M providers file inspection reports through a separate, third-party portal, Online RME, rather than through Septic Search directly. (onlinerme.com, accessed July 22, 2026)

Buying a home with a septic system anywhere in Washington involves more than pulling the county's file. See our Buying a Home With a Septic System in Washington guide for the fuller records and disclosure checklist.

Skagit County Quirks Worth Knowing

Marine Recovery Areas: locally designated, tighter rules

SCC 12.05.167–168 authorizes the county to designate Marine Recovery Areas, also called Areas of Special Concern, in places that meet specific trigger criteria under SCC 12.05.167(2): sole- source aquifers, critical aquifer recharge areas, wellhead protection areas, shellfish protection areas, or nitrogen-impacted areas. A designated area can carry added design and performance standards, larger required lot sizes, extra monitoring, mandatory system upgrades, or an outright prohibition on new development, depending on what the board sets.

The named list below is likely outdated, and the current map is a 2013 scan. The county's own MRA map is a scanned, image-based PDF dated February 2013, so it can't show whether any area has been added, removed, or reclassified since. The named list that follows comes from the county's 2007 Management Plan draft, amended in May 2012 to add Upper NE Samish and Willard Creek. Treat it as indicative, not current. (skagitcounty.net, MRA countywide map (PDF). skagitcounty.net, Local Management Plan draft (PDF). Both accessed July 22, 2026.)

The areas named in that plan: Samish Island and Samish Bay, the Similk Bay and Similk Beach community, Padilla Bay and the Bay View rural village, Guemes Island, the Lower Samish River Watershed, the Upper Samish River Watershed near Alger, the Thomas Creek Watershed, and the Nookachamps Creek Watershed.

Guemes Island is the only area named specifically as an EPA-designated sole-source aquifer in the plan, which is the strictest of the trigger categories under SCC 12.05.167(2).

Clean Samish Initiative: a $100 rebate tied to shellfish protection

The Clean Samish Initiative is a multi-agency effort to cut fecal coliform levels in the Samish Bay watershed, protecting the shellfish beds that depend on clean water there. It offers a $100 rebate toward a septic inspection or riser-lid installation for eligible properties in the watershed. (skagitcounty.net — Clean Samish Initiative and poopsmart.org, accessed July 22, 2026)

No countywide moratorium

No county page or code section describes an active moratorium on new septic permits anywhere in Skagit County as of this writing. SCC 12.05.167(3)(c) does give the Health Officer authority to prohibit new development in a designated Marine Recovery Area. Nothing published indicates that authority is currently invoked, countywide or in a specific area.

Financing help for repair and replacement

Two financing programs are advertised alongside the county's septic pages: a county Septic System Rebate Program, and low-interest Craft3 clean-water loans for homeowners repairing or replacing a failing system. (skagitcountywa-self.govplatform.com, Septic System Rebate Program. craft3.org, Clean water homeowner loans. Both accessed July 22, 2026.)

The county's OSS program page states there are "over 20,000 septic systems in Skagit County," without giving a year for that figure. The Local Management Plan governing the MRA program is posted separately on the county site. (skagitcounty.net, On-site Sewage program. skagitcounty.net, Local Management Plan. Both accessed July 22, 2026.)

Looking for a Local Pro in Skagit County

Skagit County isn't part of our live referral network yet

This site doesn't currently connect homeowners in Skagit County with a local septic provider. Tell us what you need on the contact form. If we can match you with a local pro free of charge, we will. Go to the contact form →

Primary Sources

All sources accessed July 22, 2026. This page is general information about Skagit County's septic permitting and inspection rules. It is not legal advice, and both fees and rules change over time. Confirm current requirements for your specific property with Skagit County Public Health or a licensed professional.

Related guides

Questions about Skagit County septic? Ask the Septic Guide, our AI assistant.