Snohomish County Now Requires
Septic Inspections Before Every Home Sale
The Snohomish County Board of Health adopted Ordinance BOH26-02 — requiring sellers to complete a certified septic inspection, pump the tank(s) if recommended, obtain an as-built record drawing, and submit a Report of Property Transfer (RPT) to SCHD before closing. The RPT must be reviewed and accepted by the county before a sale can proceed.
What the New Ordinance Means for Sellers & Buyers
Starting November 1, 2026, every home in Snohomish County with a septic system must have a certified inspection completed before the sale can close. This applies to approximately 2,785 properties that change hands each year.
The inspection must be performed by a certified septic professional who submits a Report of Property Transfer to the county. Tanks must be pumped if required.
The good news: inspections can be scheduled up to one year before closing — so you can get ahead of it right now.
Read the full Lynnwood Times article →Effective Date
November 1, 2026
RPT Valid For
12 months from SCHD acceptance date
County Filing Fee
$245 (2026–2027)
County Review Time
Up to 10 business days
Seller Must Provide Buyer
RPT + maintenance records + disclosure statement (RCW 64.06)
Applies To
All ~84,000 private septic systems in Snohomish County
Blackwater Services — Your Certified Inspection Partner
Licensed, insured, and certified in Snohomish County. We handle the inspection, pumping, county paperwork, and any needed repairs — one call covers everything.
Fully Certified
Licensed septic contractors certified for the Report of Property Transfer program
Same-Day Available
We move fast — don't risk losing a sale because of a delayed inspection
Repairs On-Site
If we find issues, we can fix them — no need to coordinate multiple contractors
24/7 Support
Emergency line always open — your closing timeline won't be derailed
How It Works With Blackwater
Book Your Certified Inspection
Call or book online — same-day available. We come to you anywhere in Snohomish County. Inspection must be done by a certified septic professional.
Inspection + Pumping + As-Built Drawing
We inspect the full system, pump the tank(s) if required by the inspection report, and create a site plan (as-built record drawing) if none is on file with the county — all in one visit.
We Submit the Report of Property Transfer (RPT)
We file your RPT with the Snohomish County Health Department (SCHD) on your behalf. SCHD reviews the report and related septic records — allow up to 10 business days.
SCHD Approves — You Close
Once SCHD accepts the RPT (valid for 12 months from date of acceptance), you provide it to the buyer along with maintenance records and the seller's disclosure statement. If deficiencies are noted, we handle the repairs and resubmit.
Don't Wait Until November
Inspections are valid for 12 months — schedule now, stay ahead of the rush, and close on your timeline.
Frequently Asked Questions
When does the Snohomish County septic inspection law take effect?
November 1, 2026. All homeowners selling a property in Snohomish County with a septic system must comply with Ordinance BOH26-02 after that date.
What does the seller need before closing?
Three things: (1) a full septic system inspection within the past 12 months by a certified professional, (2) tank(s) pumped if recommended on the inspection report, and (3) an as-built record drawing of the septic system. If no as-built is on file with the county, the inspector must create a site plan at the time of inspection.
What is the Report of Property Transfer (RPT)?
The RPT is the official county document that the certified septic professional submits to the Snohomish County Health Department (SCHD) on behalf of the seller. SCHD reviews it and either returns it with no deficiencies (you're cleared to close) or identifies deficiencies that must be corrected. The RPT is valid for 12 months from the date SCHD accepts it.
Who can perform the inspection and submit the RPT?
Only a certified septic professional licensed to perform inspections and submit Reports of Property Transfer in Snohomish County. Blackwater Services is fully certified. We handle the inspection, pumping, as-built drawing, and RPT filing in one visit.
What happens if deficiencies are found on the RPT?
SCHD returns the RPT to the seller with deficiencies noted. If deficiencies include surfacing sewage or another immediate health hazard, SCHD may conduct a site visit and initiate enforcement. Deficiencies must be corrected per WAC 246-272A-0270. Blackwater Services handles repairs and resubmission. If deficiencies are not resolved before sale, SCHD resets enforcement with the buyer.
What must the seller provide to the buyer at closing?
The seller must provide: (1) the SCHD-reviewed RPT (valid for 12 months from date of acceptance), (2) septic maintenance records, and (3) the seller's disclosure statement per Chapter 64.06 RCW.
Are any properties exempt from the new law?
Yes — properties where the septic system was installed within the past 12 months are exempt from the inspection requirement.
What does the county charge for the RPT filing?
The county charges a $245 application fee (2026–2027 fee schedule). Our certified inspection, pumping, and RPT preparation service is priced separately — call (425) 777-4545 for a free estimate.
Related Resources
Everything you need to understand and comply with Snohomish County's new septic inspection law.
Realtor Resources
How to prepare your seller clients, timeline tips, and inspection types explained.
Learn moreSnapshot Inspection™
Our county-compliant pass/fail inspection — satisfies BOH26-02 and the RPT requirement.
Learn moreProtection Inspection™
Goes beyond pass/fail — includes a System Health Score (0–100) and predictive risk index.
Learn moreBlackwater Protection Plan
From $59/mo — covers inspections, service calls & $1,000/yr in repair credits. Protect your investment after you close.
See plansPrintable Flyers
Download ready-to-print one-page guides for sellers and real estate agents — great for open houses and listing appointments.
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Managing multiple properties with septic systems? We offer portfolio pricing and scheduled compliance inspections.
Learn moreReady to Schedule Your Inspection?
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