Form 17 is the Northwest Multiple Listing Service (NWMLS) form that Washington sellers use to complete the seller disclosure statement required by state law. In most residential sales, the seller must answer a detailed set of questions about the property—title, water, sewer or septic, structure, systems, HOA, and environmental conditions—and deliver it to the buyer. Once the buyer receives it, the buyer generally has three business days to rescind the agreement.
This guide explains what Form 17 covers, when it is due, and how Pierce County sellers can complete it with confidence. It is general information, not legal advice. For questions about your specific situation, consult a Washington real estate attorney.
The law behind Form 17
Washington’s seller disclosure requirements are in Chapter 64.06 RCW. Under RCW 64.06.020, sellers of improved residential real property must provide a disclosure statement in the format set by the statute. Form 17 is the NWMLS version of that statement for improved residential property; a separate disclosure applies to unimproved land.
The statute is amended from time to time, and updated versions have been adopted with future effective dates. Always use the current NWMLS form your broker provides.
Key deadlines
| Step | Timing under the statute |
|---|---|
| Seller delivers the disclosure | No later than 5 business days after mutual acceptance, unless otherwise agreed |
| Buyer may rescind | Within 3 business days after the disclosure is delivered, by written notice, unless otherwise agreed |
| New information after delivery | Seller must amend and deliver the update; buyer then has 3 business days to rescind unless the seller corrects the issue at least 3 business days before closing |
Sources: RCW 64.06.020, RCW 64.06.030, and RCW 64.06.040.
In practice, many Puget Sound sellers complete Form 17 before listing so buyers can review it before writing an offer. That reduces surprises after mutual acceptance and can make offers stronger.
What Form 17 asks about
The disclosure is organized into sections, including:
- Title: ownership, easements, encroachments, boundary questions, and recorded restrictions.
- Water: the water source, and private well details if applicable.
- Sewer and on-site sewage system: whether the home connects to public sewer or a septic system, plus related history.
- Structural: roof, additions or remodels, permits, settling, and known defects.
- Systems and fixtures: electrical, plumbing, heating, and included items.
- Homeowners’ association: dues, assessments, and association information.
- Environmental: conditions such as flooding, fill, or hazardous materials known to the seller.
- Manufactured and mobile homes, when applicable.
For Pierce County sellers, the sewer and water sections deserve extra attention. Many rural and semi-rural homes—in parts of Graham, Orting, Buckley, and Bonney Lake, for example—rely on septic systems or private wells. If that applies to you, read How to Sell a Home With a Septic System in Pierce County.
Getting ready to list?
The Barnard Group helps sellers gather records and prepare disclosures before launch so buyers can move forward with confidence. Request a complimentary Home Selling Strategy Session.
How to answer well
- Answer based on actual knowledge. The form asks what you know. If you do not know, “don’t know” is an appropriate answer—guessing is not.
- Explain “yes” answers clearly. Attach invoices, permits, warranties, or reports where helpful. A clear explanation of a repaired issue often reassures buyers more than silence.
- Gather records first. Roof replacement dates, permits for remodels, pest treatments, water intrusion repairs, and septic maintenance reports make the form easier and more accurate.
- Do not rely on memory alone. Review past inspection reports, insurance claims, and contractor invoices.
- Update it if something changes. A new leak or discovered defect after delivery requires an amendment.
Form 17 is a disclosure of the seller’s knowledge, not a warranty and not a substitute for the buyer’s own inspections. Your broker can explain the form, but cannot give legal advice about how to answer. If you are unsure how to describe an issue, consult an attorney.
Are any sales exempt?
RCW 64.06.010 lists transfers that are exempt, including certain foreclosure transfers, some transfers between family members or spouses, and certain transfers by personal representatives or trustees. A buyer may also waive receipt of the disclosure in some situations, but the environmental section generally cannot be waived when a “yes” answer would apply. Estate and trust sales have particular rules, so confirm with your broker or attorney.
What about selling as-is?
Selling as-is does not remove the disclosure obligation. You can decline to make repairs, but you still need to disclose what you know. See Should I Sell My Pierce County Home As-Is or Make Repairs First?
Frequently asked questions
Can I fill out Form 17 before I list?
Yes, and it is common practice. Completing it early lets buyers review it before offering and helps avoid late-stage surprises.
What if I discover a problem after the buyer receives the form?
The seller must amend the disclosure. The buyer then has three business days to rescind, unless the seller corrects the issue at least three business days before closing.
Does Form 17 affect my closing costs?
No. For a breakdown of seller expenses, see How Much Does It Cost to Sell a House in Pierce County?
Prepare with confidence
A clear, complete disclosure is one of the simplest ways to protect a sale. If you are planning to sell in Pierce County, book your complimentary Home Selling Strategy Session with Josh Barnard and The Barnard Group.
This article provides general information about Washington’s seller disclosure requirements and is not legal advice.
