Oregon Basement Apartment Rental Laws: Key Renter Rights

Many Oregon renters consider basement apartments as affordable options, but these living spaces present unique challenges and rights. Knowing Oregon’s specific rental laws, safety standards, and tenant protections is crucial for making informed decisions and ensuring your home is legal and safe.

Understanding Basement Apartments in Oregon

Basement apartments in Oregon must comply with state habitability laws, city zoning requirements, and local building codes. Not every basement is legally permitted for rental. Always confirm whether the unit meets safety standards before signing a lease.

Habitability and Safety Requirements

Oregon's Residential Landlord and Tenant Act (ORS Chapter 90) requires all rental units, including basement apartments, to meet basic health and safety standards:

  • Proper ventilation and heat
  • Safe exits and emergency egress windows
  • No mold, pests, or hazardous conditions
  • Running water and plumbing
  • Smoke and carbon monoxide detectors

If you're unsure whether a basement apartment is legal or safe, ask for permits or contact your local building department.

Zoning and Local Ordinances

In addition to state law, local cities and counties may have stricter rules for accessory dwelling units (ADUs) or basement rentals. For example, the City of Portland’s ADU regulations govern requirements for legal basement apartments. Always check with your local jurisdiction.

Rental Agreements and Required Disclosures

Landlords must provide a written rental agreement detailing rent, security deposit terms, and any house rules. Oregon requires all landlords to disclose known lead-based paint hazards (for buildings before 1978) and provide a carbon monoxide alarm disclosure if applicable (see disclosure form).

Official Oregon Tenant Forms

  • Notice of Repair Needed: If your basement apartment needs repairs, use the Notice to Landlord — Repairs Needed form. Provide written notice and give the landlord a reasonable time to fix the problem. For example, if your basement window does not meet egress requirements and is a safety hazard, this is the form to use.
  • Notice of Rent Withholding (see ORS 90.360): If the landlord does not make critical repairs, you may be able to withhold rent after giving proper notice. Consult the Rent Withholding Law (ORS 90.360) for requirements.
  • Notice of Termination: Use the Tenant Notice to Vacate form to give written notice when you intend to move out. Typically, 30 days' notice is required on a month-to-month rental.

Dealing With Issues in Basement Apartments

If you experience health hazards, illegal conditions, or unresponsive landlords, Oregon law provides ways to assert your rights and seek help.

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When to Contact Authorities

If your landlord retaliates or attempts an illegal eviction, you can contest the action in court under ORS 90.385.

Always keep copies of all correspondence, notices, and photos related to your basement apartment conditions.

What to Do if You Suspect Your Basement Apartment Is Illegal

If you believe your unit does not comply with state or local law:

  • Ask to see proof of permits or city inspections
  • File a Notice of Repair Needed if health or safety standards are not met
  • Contact your city housing inspector or the Oregon Housing and Community Services

Remember, tenants in illegal rentals are still protected under Oregon state law, which means you cannot be suddenly evicted or denied basic rights simply because of the unit's status.

FAQ

  1. Does my basement apartment need an emergency exit in Oregon?
    Yes, Oregon law requires all sleeping areas, including basement apartments, to have an emergency exit (egress window or door) for fire safety. Check building code requirements for details.
  2. What can I do if my landlord refuses to make safety repairs?
    You should complete a Notice to Landlord – Repairs Needed. If repairs remain unaddressed, rent withholding or other legal remedies may be possible.
  3. If my basement apartment isn’t legal, can the landlord evict me immediately?
    No. Even if the unit is unpermitted, landlords must follow Oregon’s eviction procedures outlined in ORS 90.392, including proper notice.
  4. Do I have to move out if my unit is found to be illegal?
    Possibly, after due process. You may be given time to relocate, and your landlord must still follow the formal notice period required by Oregon law.
  5. Who enforces Oregon’s rental laws?
    The Oregon Judicial Department handles rental disputes and the courts enforce tenant rights statewide.

Conclusion: Key Takeaways for Oregon Basement Renters

  • Basement apartment rentals must meet Oregon’s habitability and local building code standards.
  • Illegal units do not strip renters of rights—eviction can only proceed by official process.
  • Contact local authorities or use official tenant forms if you experience safety, repair, or legal issues.

Need Help? Resources for Renters


  1. Oregon Residential Landlord and Tenant Act – ORS Chapter 90
  2. Oregon Judicial Department – Landlord & Tenant
  3. City of Portland Accessory Dwelling Unit Rules
  4. Oregon Building Codes Division
  5. Oregon Housing and Community Services – Rental Housing
Bob Jones
Bob Jones

Editor & Researcher, Renter Rights USA

Bob writes and reviews tenant law content for various regions. They’re passionate about housing justice and simplifying legal protections for tenants everywhere.