What Is the Implied Warranty Law in Washington State?

Washington’s implied warranty laws build unwritten guarantees into most consumer transactions: when you buy a product, rent a home, or purchase a newly built house, state law promises certain minimum standards even if nothing in the paperwork says so. The implied warranty law in Washington State covers goods under the Uniform Commercial Code, rental housing under the Residential Landlord-Tenant Act, and new residential construction under decades of Supreme Court decisions. Each type carries its own rules about what’s covered, when a seller or landlord can limit the protection, and how long you have to act.

Implied Warranties When You Buy Goods

Two separate warranties attach automatically to most product sales in Washington.

The first is the warranty of merchantability. Under RCW 62A.2-314, any seller who regularly deals in a type of goods implicitly promises that what they sell will pass without objection in the trade, run consistently in quality, and work for the ordinary purposes the product is used for.¹ A used car bought from a dealer for everyday driving carries an implied promise that it’s reasonably safe and suitable for ordinary driving, even if the paperwork is silent on the point.² The warranty speaks to the product’s condition at the time of sale. It isn’t a promise the product will last forever, and it doesn’t cover misuse or defects the seller disclosed before the sale.

The second is the warranty of fitness for a particular purpose. If you tell a seller what you need a product for and rely on their expertise to pick one out, RCW 62A.2-315 guarantees the product will actually work for that use.³ Ask a paint store employee for something that will hold up on an outdoor metal fence, buy what they recommend, and watch it peel off in the first rain — that’s a breach, because the seller knew your purpose and you depended on their judgment. The distinction from merchantability is reliance: you have to show you actually leaned on the seller’s knowledge rather than making your own pick.²

When a Seller Can Disclaim These Warranties

Washington lets sellers limit implied warranties, but the rules are strict. Under RCW 62A.2-316, a disclaimer of merchantability has to use the word “merchantability,” and any written disclaimer has to be conspicuous. A disclaimer of the fitness warranty must be in writing and conspicuous.⁴ Phrases like “as is” or “with all faults” can wipe out implied warranties if they clearly signal that no warranty exists.

For consumer goods — things bought primarily for personal, family, or household use — Washington goes further. A generic disclaimer isn’t enough. The seller has to spell out the specific qualities and characteristics they aren’t warranting.⁴ A blanket “sold as is” sticker on a consumer appliance, with no description of what might be wrong, is unlikely to hold up. Commercial and business purchases follow the standard disclaimer rules.

Inspection also matters. If you had the chance to examine the goods and either looked them over fully or refused the opportunity, you can’t later claim a warranty breach for defects a reasonable inspection would have caught.⁴

Federal law closes another door. Under the Magnuson-Moss Warranty Act, if a seller gives you any written warranty on a consumer product or sells you a service contract within 90 days of the sale, that seller cannot disclaim implied warranties at all. Any attempt to do so is void.⁵ So when a product comes with a one-year limited manufacturer warranty, the retailer can’t also disclaim merchantability.⁶

Implied Warranty of Habitability for Renters

Every residential rental in Washington carries an implied warranty of habitability. The landlord has to keep the property fit for human habitation throughout the entire tenancy, and a lease clause that tries to waive this duty is unenforceable. RCW 59.18.060 lists what the landlord owes you:

Structural components — roofs, floors, walls, chimneys, fireplaces, and foundations — kept in usable condition.
Electrical, plumbing, heating systems, and any appliances the landlord supplied, kept in working order.
Adequate heat, water, and hot water.
Pest control at the start of the tenancy, and during the tenancy for multi-unit buildings.
A reasonably weathertight unit.
Clean, hazard-free common areas and fire safety information for tenants.
Health-hazard information about indoor mold, in a form approved by the Department of Health.

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Landlords also have to address conditions that cause mold growth, like leaks and ventilation defects.⁸ Courts look at whether a defective condition poses a genuine health or safety risk, not mere inconvenience, when deciding whether the warranty has been breached.

How Long the Landlord Has to Start Repairs

Once you give the landlord written notice of a problem, RCW 59.18.070 sets the clock:

24 hours for loss of hot or cold water, heat, or electricity, or any condition immediately dangerous to life.
72 hours for loss of a refrigerator, stove and oven, or a major plumbing fixture supplied by the landlord.
10 days for everything else.

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These are start-work deadlines, not finish-work deadlines, though the landlord has to show the repair was completed with reasonable speed.

Repair and Deduct

If the landlord misses the deadline, you can hire a licensed contractor, get the repair done, and deduct the cost from your rent. RCW 59.18.100 caps the deduction at two months’ rent per repair and two months’ rent total over any 12-month period.¹⁰ For non-emergency repairs in the 10-day category, you can’t hire the contractor until at least 10 days after your notice or two days after the landlord receives your cost estimate, whichever is later.

Simply refusing to pay rent because repairs aren’t happening can trigger an eviction. The repair-and-deduct process is the safer legal route, and it’s worth talking to a lawyer before using it.

Implied Warranty for Newly Built Homes

When a builder sells a newly constructed home to its first intended occupant, Washington law reads in an implied warranty that the foundation is firm and secure and the house is structurally safe for residential use.¹¹ This covers construction quality in structural components, plumbing, electrical, and other core building elements.

The warranty runs only to the first purchaser who occupies the home and cannot be assigned to later buyers.¹² If you buy an existing home, even a nearly new one, this warranty doesn’t come with it. For resale homes, Washington generally follows a buyer-beware approach, which is why pre-purchase inspections carry so much weight.

The Lemon Law for New Vehicles

New motor vehicles get their own protection on top of general implied warranties. RCW 19.118 covers both express manufacturer warranties and implied warranties during an eligibility period of two years from delivery or 24,000 miles, whichever comes first. If you report a problem during this window, the manufacturer or dealer has to attempt repairs even if the eligibility period expires mid-repair. When the manufacturer can’t fix the defect after a reasonable number of attempts, you can demand a replacement vehicle or a full repurchase, and the manufacturer has 40 calendar days after your written request to comply.¹³ Lemon law remedies stack on top of any other warranty claims.

Enforcing an Implied Warranty Claim

Washington requires you to give the responsible party a chance to fix the problem before suing.

For defective goods, you have to notify the seller within a reasonable time after discovering the problem. Under RCW 62A.2-607, a buyer who fails to give notice loses the right to any remedy for the breach.¹⁴ “Reasonable time” isn’t defined in days, so document the defect and act promptly. Waiting months without explanation weakens your position.

For rental habitability issues, the RCW 59.18.070 timelines serve as the notice framework: written notice to the landlord, then the applicable 24-hour, 72-hour, or 10-day wait before you pursue remedies.⁹

For construction defect claims against a builder, Washington requires written notice of the defect and an opportunity to repair before suit. Skipping that step can defeat an otherwise valid claim.

When notice doesn’t resolve things, several routes exist. Warranty breaches that involve deceptive practices can support a claim under Washington’s Consumer Protection Act, RCW 19.86, which lets a successful plaintiff recover actual damages plus attorney’s fees, and the court can award up to three times the actual damages for unfair or deceptive acts, with that enhancement capped at $25,000.¹⁵ Small claims court handles disputes up to $10,000 for individuals and runs without the cost of a lawyer.¹⁶ Larger disputes go to superior court. Mediation and arbitration are options, and the Attorney General’s Office runs a consumer complaint resolution process.¹⁷

Deadlines That Can End Your Claim

Missing a statute of limitations ends an otherwise strong case.

For goods, RCW 62A.2-725 gives you four years from the date the breach occurred. The breach generally occurs at delivery, not discovery, which means the clock starts the day you take possession.¹⁸ The one exception: if a warranty explicitly promises future performance, the clock starts when you discover the breach or should have. A sales contract can shorten the period to as little as one year, but it can never extend it beyond four.

For new home construction defects, RCW 4.16.310 sets a six-year statute of repose. The claim has to arise within six years of substantial completion of construction or six years after the builder’s services ended, whichever is later.¹⁹ That cutoff is hard. If a foundation defect doesn’t cause visible damage until year seven, the claim is barred regardless of when you noticed. Within the six-year window, the regular statute of limitations for your type of claim still runs, so don’t wait until the end of the repose period.

For lemon law claims on new vehicles, you have to report the nonconformity within two years of delivery or 24,000 miles, whichever comes first.¹³ The manufacturer’s repair duty continues even if the eligibility period expires while the fix is underway.

1
Washington State Legislature. Washington Code 62A.2-314 – Implied Warranty Merchantability
2
Washington State Office of the Attorney General. Implied Warranty
3
Washington State Legislature. Washington Code 62A.2-315 – Implied Warranty Fitness for Particular Purpose
4
Washington State Legislature. Washington Code 62A.2-316 – Exclusion or Modification of Warranties
5
Office of the Law Revision Counsel. 15 USC 2308 – Implied Warranties
6
Federal Trade Commission. Businessperson’s Guide to Federal Warranty Law
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Washington State Legislature. Washington Code 59.18.060 – Landlord Duties
8
Washington State Department of Health. Renters, Landlords, and Mold
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Washington State Legislature. Washington Code 59.18.070 – Landlord Failure to Perform Duties
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Washington State Legislature. Washington Code 59.18.100 – Landlord Failure to Carry Out Duties
11
Justia Law. House v. Thornton
12
Washington State Legislature. Senate Bill Report SB 6701
13
Washington State Legislature. Washington Code 19.118 – Motor Vehicle Warranties
14
Justia Law. Washington Code 62A.2-607 – Effect of Acceptance
15
Washington State Legislature. Washington Code 19.86.090 – Civil Action for Damages
16
Washington State Courts. Small Claims Court
17
Washington State Office of the Attorney General. Small Claims Court
18
Washington State Legislature. Washington Code 62A.2-725 – Statute of Limitations in Contracts for Sale
19
Washington State Legislature. Washington Code 4.16.310 – Actions Arising From Construction