Oregon Mold Laws: Landlord Disclosure, Notice, and Remedies

Oregon’s mold laws sit inside the state’s landlord-tenant code rather than in a standalone mold statute. Under ORS 90.320, your landlord must keep the unit habitable, and when a leak, failed ventilation, or other building defect within their control produces mold, fixing it is their obligation. If they don’t, ORS 90.360 and ORS 90.365 give you written-notice remedies that can lead to repairs, damages, or termination of the lease.

How Oregon Law Treats Mold

There is no Oregon statute that names mold directly. Instead, mold is handled through the habitability standard in ORS 90.320, which requires every rental to be weatherproof and structurally sound. A unit is uninhabitable if it substantially lacks effective waterproofing of the roof and exterior walls (including windows and doors), plumbing in good working order, adequate heating, or floors, walls, and ceilings maintained in good repair.¹

Chronic moisture leading to mold almost always traces back to one of those listed deficiencies, which is why housing authorities and courts treat it as a habitability violation. A landlord who wipes visible mold off a wall without repairing the leak behind it has not restored habitability, and the mold will come back.

What Tenants Have to Do to Keep Their Rights

Oregon does not put every mold problem on the landlord. ORS 90.325 requires tenants to use the premises reasonably, keep areas under their control clean, and properly use plumbing, heating, and ventilation systems.² If mold grows because you block a bathroom vent, never run the exhaust fan, or let standing water sit for days, your landlord has a strong argument that your behavior caused the problem.

You also have to notify the landlord promptly. If you spot water stains, condensation, or early mold and say nothing for months, some of your legal remedies weaken. Report moisture problems in writing as soon as you notice them, keep a copy, and take date-stamped photos. That paper trail matters if the dispute escalates.

Mold Is Not a Repair-and-Deduct Item

Oregon’s repair-and-deduct remedy under ORS 90.368 lets tenants fix small habitability defects costing $300 or less and subtract the cost from rent. Mold is explicitly excluded, alongside radon, asbestos, and lead-based paint.¹ You can’t hire a cleaning crew, take $300 off the rent, and call the problem handled. Mold has to run through the landlord’s habitability duty under ORS 90.320 or the essential-services remedies under ORS 90.365.

What Your Landlord Was Required to Disclose

Oregon’s rental disclosure statute, ORS 90.305, is narrow. It requires landlords to provide the name and address of the property manager and owner (or authorized agent) and to disclose whether the property was previously used as an illegal drug manufacturing site.³ Mold and water damage history are not on that list.

Oregon’s Unlawful Trade Practices Act fills part of the gap. ORS 646.608(1)(t) makes it unlawful for anyone delivering real estate to fail to disclose a known material defect.⁴ A landlord who knew about significant mold or recurring water intrusion and rented the unit without telling you may be violating this provision. Under ORS 646.638, a tenant harmed as a result can bring a private action and recover actual damages or a $200 statutory minimum, whichever is greater, plus possible punitive damages.⁵

Notice and Remedies When the Landlord Won’t Fix It

Once you’ve given written notice of the mold problem, two statutes govern what comes next, and which one applies depends on how serious the condition is.

Standard 30-Day Notice: ORS 90.360

For most habitability violations, ORS 90.360 lets you send written notice describing the problem and stating that the lease will terminate in 30 days unless the landlord fixes it. If the issue involves an essential service, the cure period shrinks to seven days.⁶ If the landlord still doesn’t act, you can terminate the lease and pursue damages or injunctive relief in court. The statute does not authorize simply withholding rent while continuing to live in the unit.

Essential Services Failure: ORS 90.365

When the failure to maintain the property rises to an essential-service disruption, ORS 90.365 gives you three options after a reasonable time for the landlord to act. You can procure the essential service yourself and deduct the actual cost from rent, recover damages based on the reduced rental value, or, if the unit becomes unsafe, move to substitute housing, stop paying rent, and recover the excess cost of comparable housing from the landlord.⁷

If the failure creates an imminent and serious threat to your health, safety, or property, you can give written notice that the lease will terminate in 48 hours unless the landlord remedies the problem.⁷ The statute expressly excludes radon, asbestos, and lead-based paint from the imminent-threat category. Mold is not on that exclusion list, so severe contamination that makes the unit unsafe can qualify.

How to Document and Report Mold

Documentation is what separates a mold complaint that gets fixed from one that goes nowhere. Work through the sequence below:

Take date-stamped photos of visible mold, water stains, peeling paint, and damaged personal property. Include a ruler or common object for scale.
Send written notice to your landlord describing the mold, its location, and any moisture source you can identify. Reference ORS 90.320 and request repair. Keep a copy of everything you send.
Log health symptoms for anyone in the household: respiratory issues, nasal congestion, skin irritation, with dates and severity. See a doctor and save the records.
Follow up in writing if the landlord doesn’t respond. Reference ORS 90.360 or ORS 90.365 and the specific remedy you plan to use.

If the landlord still won’t act, contact your local code enforcement office or housing authority. Inspectors can enter the property, document the mold, and issue correction notices with their own deadlines. In Portland, the Rental Housing Code under PCC 30.01.085 adds enforcement teeth, and a landlord who fails to comply may be liable for up to three times the monthly rent plus actual damages, relocation assistance, and attorney fees.⁸

If local enforcement doesn’t resolve it, you can file a complaint with the Oregon Attorney General’s Office under the Unlawful Trade Practices Act, especially where the landlord concealed the condition or misrepresented the property’s state.⁴

Retaliation Protection

Tenants often hesitate to report mold because they fear eviction. ORS 90.385 addresses that directly. After you complain to a government agency about a code or habitability violation, a landlord cannot raise your rent, reduce services, threaten eviction, or begin eviction proceedings in retaliation.¹ If a landlord retaliates, you can raise it as a defense in any possession action and pursue remedies under ORS 90.375.

The protection has limits. It does not apply if the code violation was primarily caused by your own lack of reasonable care, if you were behind on rent when the notice was served, or if compliance would require demolition or remodeling that makes the unit unusable. For a straightforward mold complaint caused by a building defect, though, the retaliation shield is strong.

Reasonable Accommodation for Respiratory Conditions

Tenants with asthma, chronic lung disease, or other conditions worsened by mold may have additional protection under the federal Fair Housing Act. Under 42 U.S.C. § 3604(f)(3)(B), landlords must make reasonable accommodations in rules, policies, and practices when necessary for a tenant with a disability to use and enjoy the dwelling.⁹

To trigger the duty, notify your landlord in writing that someone in the household has a qualifying condition and request accommodation. A letter from a doctor explaining how mold exposure worsens the condition strengthens the request. If the landlord refuses or stalls, you can file a complaint with HUD or a local fair housing agency. This applies to private-market rentals, not only subsidized housing.

Subsidized Housing: Faster Timelines Under NSPIRE

Tenants in HUD-assisted or public housing get a separate, more specific set of deadlines under HUD’s NSPIRE inspection protocol:

Moderate levels (more than 4 square inches but less than 1 square foot in a room) must be corrected within 30 days.
High levels (1 to 9 square feet) are classified as a severe health and safety deficiency requiring correction within 24 hours.
Extremely high levels (more than 9 square feet) are classified as life-threatening, also requiring correction within 24 hours.

NSPIRE inspectors also check for elevated moisture using pinless moisture meters when they see peeling paint, warped walls, or water-stained ceilings.¹⁰ If you’re in subsidized housing and your property manager is ignoring mold, these federal standards open a separate enforcement path through HUD on top of Oregon’s state remedies.

Where to Take the Dispute

If direct communication hasn’t worked, mediation through a local housing authority or a tenant advocacy group can help both sides reach an agreement without litigation. It is faster and cheaper, and it often preserves the tenancy when both parties want to keep it.

When mediation fails, Oregon’s small claims court handles cases up to $10,000.¹¹ That’s the right venue for mold-related expenses like medical bills, damaged personal property, or temporary housing costs. Larger habitability claims or requests for injunctive relief belong in circuit court. Legal aid organizations, including Oregon Law Center, provide free representation to low-income tenants on housing matters, mold disputes included.

The financial exposure for landlords who ignore mold adds up quickly. Damages under ORS 90.360 can cover the period the unit was uninhabitable and include injunctive relief. Tenants who relocate due to an essential-service failure can recover substitute-housing costs on top of being excused from rent under ORS 90.365.⁷ Where the landlord knowingly concealed the condition, a private action under ORS 646.638 can yield actual damages, possible punitive damages, and attorney fees to the prevailing tenant.⁵ Portland renters get the additional PCC 30.01.085 remedies of up to three times monthly rent plus actual damages and relocation assistance per violation.⁸

1
Oregon State Legislature. Oregon Revised Statutes Chapter 90 – Residential Landlord and Tenant
2
Oregon State Legislature. Oregon Revised Statutes 90.325 (2025) – Tenant Duties
3
Oregon State Legislature. Oregon Revised Statutes 90.305 (2025) – Disclosure of Certain Matters
4
Oregon State Legislature. Oregon Revised Statutes 646.608 (2025) – Additional Unlawful Business, Trade Practices
5
Oregon Public Law. ORS 646.638 – Civil Action by Private Party; Damages; Attorney Fees
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Oregon State Legislature. Oregon Revised Statutes 90.360 (2025) – Effect of Landlord Noncompliance With Rental Agreement or Obligation to Maintain Premises
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Oregon State Legislature. Oregon Revised Statutes 90.365 (2025) – Failure of Landlord to Supply Essential Services; Remedies
8
Portland.gov. 30.01.085 Portland Renter Additional Protections
9
Office of the Law Revision Counsel. 42 U.S. Code 3604 – Discrimination in the Sale or Rental of Housing and Other Prohibited Practices
10
HUD.gov. NSPIRE Standard – Mold-like Substance
11
Oregon State Legislature. Oregon Revised Statutes Chapter 46