What Washington Sellers Must Disclose on Form 17

What does Washington's Form 17 require sellers to disclose?

The Form 17 Washington seller disclosure statement requires you to tell the buyer what you actually know about your home's condition — the roof, plumbing, electrical, foundation, water, sewer, environmental issues, and HOA details. You answer each item “Yes,” “No,” or “Don't Know,” and explain every “Yes.” You're not required to inspect or investigate — only to disclose what you genuinely know. You must deliver it within five business days of mutual acceptance, and the buyer then has three business days to back out.

By Samantha Schlegel | June 17, 2026

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If you're selling a single-family home anywhere in Shoreline, Edmonds, Mountlake Terrace, or the greater Seattle area, one document will land on your plate early and carry more legal weight than almost anything else you sign: the Form 17 Washington seller disclosure statement. It's a state-required form, it follows you after closing, and it's the single most common place sellers accidentally create problems for themselves.

Here's the good news. Form 17 is far less scary than it looks once you understand the rule that governs the whole thing. Get that rule right, and the form becomes a shield instead of a liability.

What Form 17 actually asks you to disclose

Form 17 is Washington's legally required Seller Disclosure Statement under RCW 64.06, and it applies to most residential resale transactions. It's organized into sections that walk through the major systems and history of your home:

• Title - ownership, easements, encroachments, boundary disputes, and any leases or rights affecting the property

• Water - source, any shared wells, water rights, irrigation

• Sewer and septic - connection type, septic system history, and known problems

• Structural - roof, foundation, settling, additions or remodels, and whether permits were pulled

• Systems and fixtures - electrical, plumbing, heating, and appliances that convey

• Environmental - flooding, drainage, soil stability, hazardous materials, and proximity to known issues

• Homeowners' association - dues, assessments, and shared common areas

• Full disclosure by seller - a catch-all for anything material you're aware of that the rest of the form didn't capture

For each item, you answer Yes, No, or Don't Know. Every “Yes” needs a short explanation. That's it. You're describing your home's condition as you know it - not certifying that everything is perfect, and not guaranteeing anything.

The one rule that protects you: you disclose what you know

This is the part most sellers miss, and it's the part that keeps you out of trouble.

Your obligation is tied to actual knowledge. You disclose what you genuinely know. You are not required to hire inspectors, dig through old records, or go investigating problems you've never noticed. Washington law (RCW 64.06.050) specifically protects sellers from liability for errors or omissions about things they truly didn't know.

So when you hit a question you're unsure about, “Don't Know” is an honest and acceptable answer. It's not a dodge - it's often the correct one. What you can't do is claim ignorance about something you clearly know, or actively paper over a problem.

The trouble starts in one of two ways:

1. You knew about a material defect and didn't disclose it. That can expose you to a claim for negligent or intentional misrepresentation after closing.

2. You took steps to hide a known problem - painting over a water stain, for example. That's fraudulent concealment, and it's the most serious version of this.

The throughline is simple: honesty about what you know protects you. Concealment is what creates lawsuits. This is exactly the kind of thing I walk every seller through before they fill out a single line - because a careful, truthful Form 17 is one of the best forms of protection you have.

A couple of situations come up constantly, so let me clear them up.

Selling “as-is” does not get you out of disclosing. As-is means you won't make repairs - it does not waive your disclosure obligations. You still complete Form 17 and still disclose known defects. If you're weighing that route, my breakdown on whether to sell your Shoreline home as-is or fix it first walks through the trade-offs.

You usually don't have to disclose a death in the home. Washington doesn't require disclosing a death - natural, accidental, suicide, or homicide - unless the buyer asks directly, or unless the event caused a physical defect or safety issue you'd otherwise need to report. If a buyer asks you directly, you can't misrepresent it.

Deadlines, rescission, and what happens if you get it wrong

Timing on Form 17 matters as much as content, and it's where deals quietly go sideways.

• You must deliver Form 17 to the buyer no later than five business days after mutual acceptance, unless your contract says otherwise.

• Once the buyer receives it, they have three business days to rescind - to cancel the purchase and walk away - even after the offer was accepted. This is a normal, built-in checkpoint, not a sign anything went wrong.

• If you deliver it late, complete it improperly, or skip it, the buyer's right to rescind can extend beyond that three-day window - which means a buyer could potentially back out much later in the process.

That last point is why a sloppy or rushed Form 17 is more dangerous than people realize. It doesn't just risk a post-closing dispute - it can keep your sale cancelable long after you thought you were locked in.

There's a 2026 wrinkle worth naming, too. King County's market has rebalanced this year - more inventory, homes sitting closer to three to four weeks on average, and prices roughly flat year over year. In a cooler, more cautious market, buyers and their agents scrutinize disclosures harder and are quicker to use any opening to renegotiate or walk. A clean, complete Form 17 keeps that door shut. If you want the full picture of what selling actually costs and involves right now, my Shoreline seller cost breakdown lays it out.

The bottom line: fill out Form 17 carefully, honestly, and on time. Disclose what you know, use “Don't Know” when that's the truth, and never hide a defect. Done right, it protects you for years after you hand over the keys.

Frequently Asked Questions

Do I have to disclose problems I fixed before listing?

If a repair fully and properly resolved the issue, you generally disclose that the repair was made rather than treating it as an active defect. The risk is repairs that were cosmetic or incomplete — if you know the underlying problem still exists, you have to disclose it. When in doubt, disclose the history.

What if I genuinely don't know the answer to a Form 17 question?

Answer “Don't Know.” Washington only requires you to disclose what you actually know, and you're not obligated to investigate. An honest “Don't Know” is far safer than a guess that turns out wrong.

Can a buyer sue me after closing over my disclosure?

They can if you knew about a material defect and failed to disclose it, or if you concealed it. They generally can't hold you liable for something you genuinely didn't know about. Accuracy and honesty on Form 17 are your best protection.

Do I still need Form 17 if I'm selling my home as-is?

Yes. Selling as-is means you won't make repairs, but it doesn't remove your duty to disclose known defects. You complete Form 17 either way.

How long does the buyer have to back out after getting Form 17?

Three business days from receipt. If the form is delivered late or filled out improperly, that rescission window can extend, so timely, accurate delivery matters.

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Form 17 isn't the scary part of selling - it's the protective part, as long as you treat it with care. Disclose what you know, deliver it on time, and never hide a defect, and you've removed one of the biggest sources of post-closing risk.

Every home and every sale has its own wrinkles, and the gray areas are exactly where having someone in your corner matters. If you're getting ready to list in Shoreline or anywhere around Seattle and want to make sure your disclosures are buttoned up before you sign anything, I'm happy to walk you through it. Reach out anytime.

About Samantha Schlegel

Samantha Schlegel is a residential listing specialist serving Shoreline and the greater Seattle area, with a focus on sellers navigating complex situations like probate, inherited homes, divorce, and relocation. She believes every seller deserves a strategy tailored to their real circumstances, not a one size fits all approach. Samantha works with Compass Real Estate and is known for guiding clients through tough transitions with clarity and care.