Septic inspections on Camano Island
Camano Island sits in Island County, and Island County has required a septic inspection at time of sale since 2008. That is the single most important fact on this page. If you are selling a home anywhere on the island, from Terry's Corner south, an inspection by an Island County Licensed Maintenance Service Provider is part of your sale, and it has been part of every island sale for well over a decade.
Unlike Snohomish County across the bridge, where inspection at sale only takes effect in late 2026, Island County has had this requirement on the books since 2008. Sellers, agents, and title companies on the island have been running this play for years. Here is how it works.
The requirement, in plain terms
When a septic property sells in Island County, the buyer and seller need a current inspection of the on-site septic system. Current means within the validity window for your system type, covered below. The inspection documents the condition of the tank, the drainfield, and any pumps or treatment components, and it becomes part of the record a buyer relies on.
Washington's seller disclosure law (RCW 64.06) runs alongside the county requirement: you have to disclose what you know about the system. A real inspection report is the cleanest way to answer those questions with confidence instead of guesswork.
Who may do the inspection
Island County licenses the people who inspect septic systems in its jurisdiction. For a sale, the inspection must come from an Island County Licensed Maintenance Service Provider. That licensing is county-specific: being certified to work in a neighboring county does not by itself make someone eligible to do a time-of-sale inspection on Camano.
One wrinkle worth knowing. Island County runs a homeowner certification program that lets qualifying owners of conventional systems perform their own routine inspections. Good program, saves islanders money on maintenance. But it applies to routine inspections only. A sale needs a licensed provider's inspection, full stop. If you have been self-inspecting for years, budget for one professional inspection when you decide to sell.
Validity windows: 12 months or 3 years
How fresh the inspection must be depends on what kind of system you have.
- Conventional gravity and pressure systems: 3 years. An inspection within the past 3 years satisfies the time-of-sale requirement. These systems are simpler, so the county accepts a longer window.
- Alternative systems: 12 months. ATUs, sand filters, mounds, and other systems with treatment components or pumps need an inspection within 12 months of the sale. More moving parts, shorter window.
Practical upshot: if you own a gravity system and keep up with routine inspections, there is a fair chance your last report already covers a sale. Check the date before paying for a new one. If you are not sure which category your system falls in, the as-built drawing settles it.
Where the records live
Island County keeps septic records in two places, and a smooth sale uses both.
OnlineRMEholds inspection and maintenance reports. Every report a licensed provider files on your system lands here, so it doubles as your system's service history. Buyers and their lenders like seeing a consistent record.
SmartGOV is the county permit portal where as-built drawings live. The as-built shows where your tank, lines, and drainfield actually sit, which is what the inspector works from on site.
If digging through two county systems is not how you want to spend an evening, we pull both for sellers as part of setting up the inspection. Tell us the address and we come to the appointment already knowing your system.
What it costs
Island County itself cites $100 to $500 for inspections. Most full time-of-sale inspections we see run $300 to $600. The spread is mostly system type and access: a gravity tank with exposed risers is quick, while an alternative system means testing pumps, floats, and alarms, and a buried lid means digging before anyone inspects anything. If pumping is needed it typically adds $400 to $700, cheapest when done the same visit. Full breakdown on our inspection cost page and pumping page.
If the inspection finds a problem
Most inspections pass, especially on systems with a steady OnlineRME history. When one does not, you have two honest paths: repair the deficiency before closing, or disclose it and negotiate, usually as a price concession sized to the repair. RCW 64.06 means a known problem gets disclosed either way, so the choice is about money and timing, not about whether the buyer finds out.
The math usually favors repairing. A broken baffle or a failed pump is a bounded, quotable fix; the same item left open at negotiation time gets padded for uncertainty by the buyer's side. The exception is major drainfield work, where replacement runs $10,000 to $30,000 or more and a concession is often the cleaner path. As always, finding out at listing beats finding out during the buyer's inspection period, which is the whole argument for inspecting early.
Fifteen minutes away, no ferry
We are based in Stanwood, which puts Camano Island 15 minutes over the Mark Clark bridge. No ferry line, no tide table, no waiting for a mainland outfit to decide the island is worth the drive. Island soils and high water tables near the shoreline make septic care matter more here than most places, and scheduling should not be the hard part.
Selling on the Stanwood side instead? Snohomish County runs a different process with its own paperwork. Start with our Snohomish County point-of-sale guide, or see how every Washington county compares in our statewide seller's guide. Agents working both sides of the bridge: our agent page lays the two counties out side by side.
Common questions
Do I need a septic inspection to sell my house on Camano Island?
Yes, and this is not a recent change. Island County has required a septic inspection at time of sale since 2008. The inspection must be performed by an Island County Licensed Maintenance Service Provider, and it must be current: within 12 months of the sale for alternative systems, or within 3 years for conventional gravity and pressure systems.
Who is allowed to do a time-of-sale inspection in Island County?
An Island County Licensed Maintenance Service Provider. Island County licenses the providers who inspect systems in its jurisdiction, and a sale-related inspection has to come from one of them. A report from an unlicensed inspector, or a homeowner's own routine inspection, does not satisfy the time-of-sale requirement.
I certified to inspect my own septic system. Does that cover a sale?
No. Island County's homeowner certification program lets qualifying owners of conventional systems do their own routine inspections, and it is a good program for keeping maintenance costs down. But it covers routine inspections only. When the property sells, the inspection must come from an Island County Licensed Maintenance Service Provider.
How much does a septic inspection cost on Camano Island?
Island County publishes a range of $100 to $500. In practice most full time-of-sale inspections run $300 to $600, with system type and access moving the price more than anything. A conventional gravity system with an accessible tank sits at the low end; alternative systems with pumps, floats, and control panels take longer to check and cost more. If the tank needs pumping, that typically adds $400 to $700.
How do I find my septic records for a Camano Island property?
Two county systems hold them. Inspection and maintenance reports are filed in OnlineRME, the reporting database Island County uses. As-built drawings and permit records are available through the county's SmartGOV portal. Pull both before you list: the as-built tells the inspector where everything is, and the OnlineRME history shows a buyer the system has been looked after.
How long is my inspection good for when I sell?
It depends on your system type. For conventional gravity and pressure systems, an inspection within the past 3 years satisfies Island County's time-of-sale requirement. For alternative systems, such as ATUs, sand filters, and mound systems, the inspection must be within 12 months of the sale. If your last inspection is older than the window for your system type, you need a new one before closing.
Talk to a septic pro today
One call handles it: inspection, pumping if it's needed, and the county paperwork done right the first time.
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