By Genaro Shaffer, Bellwether Real Estate — Updated May 2026
Form 17 is Washington’s required seller disclosure statement. Every WA residential real estate transaction involves it. Buyers should know what to look for; sellers should know what to disclose.
The 60-second answer
Form 17 is a 6-page Washington state form where sellers disclose known material facts about the property — defects, history, systems, environmental issues, and HOA information. Sellers must complete + sign it before closing. Buyers have 3 days after receipt to revoke purchase based on disclosures. Honest completion protects sellers from post-sale liability; review by buyers prevents surprises.
What Form 17 covers
The form has multiple sections:
1. Title issues
- Easements
- Liens
- Boundary disputes
- Right-of-way issues
2. Water
- Public water vs well
- Water rights
- Recent water issues
- Water source quality
3. Sewer / on-site septic
- Public sewer vs septic
- Septic system age + condition
- Recent septic issues
- Sewer connection status
4. Structural
- Foundation issues
- Roof condition + age
- Window/door issues
- Flooring + walls condition
- Recent settling
5. Systems
- Heating/cooling system age + condition
- Electrical system
- Plumbing system
- Appliances
- Pool/spa if applicable
6. Environmental
- Lead-based paint (pre-1978 homes)
- Asbestos
- Underground storage tanks (oil tanks especially)
- Radon
- Mold
- Pest infestations
- Hazardous materials
7. HOA / Common Interest
- HOA dues + assessments
- Pending special assessments
- HOA reserves
- HOA rules + restrictions
8. Other
- Insurance claims history
- Recent improvements
- Building permits status
- Defects known to seller
When sellers must complete Form 17
- Before closing — required
- Within 5 days of accepted purchase contract typically
- Updated if material facts change before closing
What buyers should do with Form 17
Read every section carefully. Yes, all 6 pages.
Pay particular attention to:
- Anything marked “Yes” in known defects
- Environmental disclosures (especially oil tanks)
- HOA reserves + assessments
- Recent insurance claims
- Boundary or easement issues
The 3-day revocation right: After receiving Form 17, you have 3 business days to revoke purchase based on disclosures. If you don’t revoke + don’t otherwise terminate, you’ve accepted the disclosures.
Combined with inspection: Form 17 + your independent inspection = your due diligence. Form 17 tells you what the seller knows; inspection tells you what an outside expert sees.
Common Form 17 issues
For buyers:
- “Unknown” answers can be concerning. Verify with inspection.
- Inconsistencies between Form 17 and inspection — important to reconcile.
- Environmental issues marked yes — get expert assessment.
- Oil tanks — Washington has specific UST (underground storage tank) rules. Inspect.
- HOA reserves under 50% of fully-funded — warning sign for future special assessments.
For sellers:
- Don’t omit known defects. Form 17 disclosure protects you from post-sale liability for disclosed items. Omissions create liability.
- Don’t be vague. “Some leaking” without specifics creates buyer questions + potential disputes.
- Use “Unknown” honestly. Better than guessing.
- Update if conditions change. New information before closing requires update.
What Form 17 doesn’t cover
Form 17 is sellers’ known material facts. It doesn’t:
- Replace inspection
- Cover what sellers genuinely don’t know
- Substitute for title insurance review
- Replace title commitment + easement review
You still need: inspection, title commitment review, lender appraisal, and (often) attorney review.
Legal mechanics
Form 17 is required by RCW 64.06 — Washington’s Seller Disclosure law.
Sellers’ liability:
- Disclosed items = no liability typically
- Undisclosed material defects sellers knew = potential liability post-sale
- Truly unknown defects = limited seller liability
Buyers’ rights:
- 3-day revocation after receipt
- Continued right to terminate per inspection contingency
- Post-sale legal action available for undisclosed material defects
Common questions
Can sellers refuse to provide Form 17? No — required by WA law for residential real estate transactions.
Can buyers waive Form 17? Specific waiver in writing possible but unusual + not recommended.
What if seller is selling “as is”? “As is” doesn’t waive Form 17 requirement. Sellers still must disclose known material defects.
What if Form 17 marks everything “Unknown”? Concerning — especially if seller has lived in home for years. May warrant deeper investigation.
Does Form 17 cover new construction? Yes — though new construction often involves additional builder warranties.
Does Form 17 apply to commercial sales? No — Form 17 is residential. Commercial has different disclosure mechanics.
What about FSBO (for sale by owner) transactions? Form 17 still required even without agents.
Can I sue for undisclosed defects post-sale? Possible if seller knew + didn’t disclose. Consult attorney for specific situation.
Talk to Genaro
📞 (360) 389-6616 · ✉️ genaro@bellwetherrealestate.com
For buyer process: Buying a Home in Bellingham. For seller process: Sell Your Bellingham Home.
Don’t go generic — go with Genaro.
Genaro Shaffer · WA Broker #27119 · Bellwether Real Estate · 11+ years · 67+ transactions · 5.0 Zillow 📞 (360) 389-6616, Bellingham WA 98225 Powered by Bellwether Real Estate · Member NWMLS · Equal Housing Opportunity
This is real estate guidance, not legal advice. Form 17 disputes may require attorney consultation.