Is a landlord responsible for mold in a Portland Rental Property?

In the lush, rainy climate of Portland, Oregon, moisture is a constant companion. For many renters and landlords, this raises a critical question: Is a landlord responsible for mold in a Portland rental property?
The short answer is yes, but with conditions. Under Oregon law and Portland city code, the responsibility for mold is generally shared between the landlord and the tenant, depending on the cause of the growth.
The Landlord’s Duty: Habitability
In Oregon, landlords are legally required to provide a “habitable” living environment (ORS 90.320). This means the property must be safe, sanitary, and weatherproofed. If mold results from a structural failure or lack of maintenance, the landlord is responsible for remediation.
Typical scenarios where the landlord is responsible include:
- Roof or Siding Leaks: If water is entering the home through the building envelope.
- Plumbing Issues: Leaky pipes under sinks, behind walls, or in the crawlspace.
- Poor Ventilation: If the unit lacks functional exhaust fans in the bathroom or kitchen, or if windows are improperly sealed.
- HVAC Failures: When heating systems fail to manage indoor humidity or circulation.
In Portland specifically, City Code Title 29 mandates that properties be kept free of dampness and visible mold. If a landlord fails to address a structural leak that leads to mold, they violate these habitability standards.
The Tenant’s Duty: Prevention and Reporting
While the landlord must provide a sound structure, the tenant has a duty to use the home in a way that prevents mold. According to the Oregon Residential Landlord and Tenant Act, a tenant must keep the premises as clean and safe as conditions permit.
A tenant may be held responsible for mold if it is caused by:
- Lack of Ventilation: Failing to run exhaust fans during showers or cooking.
- Excessive Moisture: Keeping an unusual number of indoor plants or drying clothes inside without proper airflow.
- Failure to Report: If a tenant notices a small leak but waits months to report it to the landlord, the tenant may be liable for the resulting extensive mold damage.
What to Do if You Find Mold
If you discover mold in a Portland rental, the first step is to notify the landlord in writing. In Oregon, verbal notice is often insufficient for legal protection. Your written notice should include:
- A description of the mold and its location.
- Any suspected causes (e.g., a nearby leak or a non-working fan).
- A request for a timeline for inspection and repair.
If the landlord ignores the request, Portland tenants can contact the Bureau of Development Services (BDS) to request a code inspection. If an inspector finds that a code violation causes the mold, they can compel the landlord to make repairs.
Partner with the Professionals
Managing mold issues can be a legal and financial headache for independent landlords. Ensuring your property stays compliant with Portland’s strict habitability codes requires proactive maintenance and clear communication with tenants.
At Rent Portland Homes – Professionals, we specialize in protecting your investment. From routine inspections to coordinating expert remediation, we handle the complexities of Portland property management so you don’t have to.
Are you a landlord looking to ensure your property remains safe and compliant? Contact Rent Portland Homes – Professionals today to learn how our comprehensive management services can give you peace of mind year-round.
CALL TODAY: (503) 646-9664 – Talk to a Live Person – Our office answers the phone 9 AM to 5 PM Monday through Friday – or click here to connect with us online.








