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SellingPublished August 25, 2026
Washington Form 17 Explained | What Seattle Sellers Must Disclose
Washington Form 17 Explained | What Seattle Sellers Must Disclose
Selling a home in Seattle involves specific legal responsibilities, chief among them being the seller disclosure statement known in Washington state as Form 17. This statutory document requires homeowners to disclose known material defects about the physical condition of the property before closing.
Completing Form 17 accurately protects you from future buyer disputes while building trust during contract negotiations.
Understanding Key Sections of Form 17
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Environmental Factors and Structural Systems Form 17 covers a wide range of property features and potential issues.
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Systems and Fixtures: You must disclose the operational status of electrical networks, heating systems, plumbing lines, and included major appliances.
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Water Damage and Roof Condition: Disclose any known history of roof leaks, basement flooding, dampness, or drainage problems around the foundation.
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Unpermitted Work and Boundaries Seattle homeowners frequently renovate or update older spaces. Form 17 asks specific questions about property alterations.
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Permits and Building Codes: Sellers must disclose whether additions, basement buildouts, or structural modifications were completed with required city permits.
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Encroachments and Shared Fences: Disclose any known boundary line disputes, shared driveways, or structural encroachments onto neighboring lots.
Frequently Asked Questions
What happens if a seller lies on Washington Form 17? Failing to disclose known defects can expose sellers to legal liability for rescission or fraud after the sale completes. Honest disclosures protect sellers from post closing lawsuits.
Can a buyer cancel the contract based on Form 17? Yes, buyers in Washington state have three business days after receiving Form 17 to review disclosures and can rescind the agreement if they disapprove of items noted.
Do I have to disclose issues that were already repaired? Yes, if a past issue required major repairs, such as basement waterproofing or sewer line replacement, disclosing the past issue alongside documentation of professional repairs reassures buyers.
Questions about completing Form 17 or preparing your Seattle home for listing? Contact our experienced seller representatives today for professional market guidance!
Call: (425) 920-3959
Sean Dooney
| Fox Real Estate Groups | Sean Dooney | Keller Williams Bothell
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