Key Takeaways

  • Washington requires sellers to complete a Seller Disclosure Statement (Form 17) for most residential sales
  • Form 17 covers property condition including structural, environmental, and legal issues
  • Sellers who provide incomplete disclosure allow buyers to rescind within 3 business days of receiving disclosure
  • Sellers can choose not to complete Form 17, but buyers then have expanded rescission rights
  • Lead-based paint disclosure is required by federal law for homes built before 1978
Last updated: January 2026

Washington Seller Disclosure Requirements

Unlike some states, Washington has mandatory seller disclosure requirements for most residential real estate transactions.

Form 17 - Seller Disclosure Statement

The Form 17 Seller Disclosure Statement is required by RCW 64.06 for most residential sales.

When Required

Transaction TypeForm 17 Required?
Residential 1-4 unitsYes
Condominium unitsYes
Improved residential landYes
New constructionMay be modified
REO/ForeclosureExemptions may apply
Estate salesLimited exemptions
Court-ordered salesExemptions may apply

Form 17 Contents

The Form 17 requires disclosure of:

SectionTopics Covered
TitleOwnership, liens, encroachments, easements
WaterSource, treatment, quality, systems
Sewer/SepticSystem type, maintenance, condition
StructuralFoundation, roof, walls, floors
SystemsHVAC, electrical, plumbing, appliances
EnvironmentalLead paint, asbestos, contamination
Full DisclosurePets, flooding, defects, HOA
LegalPermits, violations, disputes

Seller's Completion Options

Sellers have three choices:

  1. Complete Form 17 fully - Best practice, reduces liability
  2. Complete partially - Must explain "don't know" or "N/A" responses
  3. Decline to complete - Buyer gains expanded rescission rights

Buyer Rescission Rights

Standard Rescission Period

If seller provides Form 17 after mutual acceptance:

SituationBuyer Can Rescind Within
Form 17 delivered after mutual acceptance3 business days of receipt
Amended disclosure delivered3 business days of amendment

Expanded Rights Without Form 17

If seller declines to provide Form 17:

SituationBuyer Can Rescind
No Form 17 providedUntil closing or possession
Greater riskBuyers should be cautious

Practical Note: Most buyers expect Form 17. Declining to provide it may deter buyers or invite lower offers.

Broker Disclosure Duties

Washington brokers have independent disclosure duties:

What Brokers Must Disclose

Must DiscloseDescription
Material factsKnown facts affecting property
Agency relationshipWho the broker represents
Conflicts of interestAny personal interest in transaction
Known defectsProperty condition issues

Broker's Standard of Knowledge

Brokers must disclose facts they:

  • Actually know
  • Should have known through reasonable diligence
  • Have reason to believe are material

Key Point: Broker disclosure duties exist independent of seller disclosure duties. Even if seller doesn't disclose, broker must disclose known material facts.

Federal Disclosure Requirements

Regardless of Washington state law, federal requirements apply:

Lead-Based Paint Disclosure (Pre-1978 Homes)

For any home built before 1978:

  • Seller must provide EPA pamphlet "Protect Your Family From Lead in Your Home"
  • Seller must disclose known lead-based paint
  • Buyer has 10 days to conduct lead inspection (can be waived)
  • Specific disclosure forms must be signed

Other Federal Requirements

DisclosureWhen Required
Flood zoneRequired by lenders for federally-related loans
Environmental hazardsIf known
FIRPTA (foreign seller)Withholding requirements
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Washington Disclosure Requirements
Test Your Knowledge

What is the Form 17 in Washington real estate?

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Test Your Knowledge

If a Washington seller provides Form 17 after mutual acceptance, how long does the buyer have to rescind?

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Test Your Knowledge

For homes built before 1978, what federal disclosure is required?

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