10 Oregon Landlord Law Mistakes (and the Class Topic That Prevents Each)
If you manage your own rentals in Oregon, you already know the law is long. ORS Chapter 90 runs well past a hundred sections, and it changes almost every legislative session. The good news: the mistakes that actually cost landlords money show up over and over, and almost all of them are preventable with the right training.
After years of teaching landlord classes, the pattern is clear. Expensive mistakes are rarely about bad intentions. They're a missed clock, a missing form, or a rule that changed while you were busy. Here are 10 Oregon landlord law mistakes we see most, the statewide rule behind each one, what it can cost, and the class topic that prevents it.
These are statewide rules. Some cities, like Portland, add their own layer on top.
One quick note before the list. None of this is meant to scare you off self-managing. Plenty of Oregon landlords run their own rentals well for decades. What they have in common is a habit: they learn the rule before they need it, keep a calendar for every deadline, and use forms written for current Oregon law instead of a lease they downloaded years ago. If you build that habit, most of this list never happens to you.
Oregon landlord law mistakes 1 to 5: money, notices and repairs
1. Charging for wear and tear, or missing the 31-day accounting
Under ORS 90.300, you can deduct only for the tenant's defaults and for damage beyond ordinary wear and tear, and you must deliver a written accounting stating the specific basis of each claim within 31 days after the tenancy ends and the tenant delivers possession.
The cost: the tenant can recover twice the amount withheld without a proper accounting or in bad faith.
The class topic that prevents it: move-out and deposit accounting, covered in our day-to-day operations and habitability classes.
2. Getting the rent increase notice wrong
ORS 90.323 bars any increase in the first year of a tenancy, allows only one increase in any 12 months, and requires at least 90 days' written notice for tenancies other than week-to-week. The notice must state the amount of the increase, the new rent and the effective date, plus the facts supporting an exemption if you're above the cap. The cap itself is the lesser of 10% or 7% plus CPI, published each year by the state, and units whose first certificate of occupancy is less than 15 years old are exempt from the cap.
The cost: an increase above the cap can make you liable for three months' rent plus actual damages.
The class topic that prevents it: rent increases and no-cause terminations.
3. Using the wrong termination notice
Oregon has different notices for nonpayment (ORS 90.394), other for-cause violations (ORS 90.392), and terminations without tenant cause (ORS 90.427). After the first year of occupancy, a landlord generally can't end a month-to-month tenancy without cause, only for tenant cause or a qualifying landlord reason with 90 days' notice. For qualifying reasons, landlords with an ownership interest in five or more units must also pay one month's rent with the notice.
The cost: a defective notice usually means starting over, plus losing the court case and possibly paying the tenant's attorney fees.
The class topic that prevents it: our legal guide to ending a tenancy.
4. Screening without written, consistent criteria
If you deny an applicant after screening, ORS 90.304 requires a written statement of the reasons within 14 days. Your criteria must apply the same way to everyone, and ORS 659A.421 prohibits discrimination based on protected classes, on top of federal fair housing law. ORS 90.295 also limits screening fees and requires you to tell applicants about your criteria.
The cost: fair housing complaints, damages and attorney fees, and the time to defend them.
The class topic that prevents it: tenant screening that actually works.
5. Slow or skipped repairs
ORS 90.320 requires landlords to keep the unit habitable throughout the tenancy, including weatherproofing, plumbing, hot and cold water, heat, electrical, and a unit free of rodents and vermin at the start. Tenants have repair and rent remedies when you don't.
The cost: rent reductions, damage claims and counterclaims in an eviction case.
The class topic that prevents it: habitability, repairs and tenant accountability.
and now a couple shameless plugs.
Every one of these topics is part of the RPM Education class lineup, taught with real Oregon forms and scenarios so you can practice before it counts.
Need Oregon landlord forms to go with what you learn? The Portland Area Rental Owners Association (PAROA) gives members forms written for Oregon law.
Oregon landlord law mistakes 6 to 10: paperwork and process
6. Putting illegal clauses in the lease
ORS 90.245 says a rental agreement can't make a tenant waive rights under the landlord-tenant law, confess judgment, excuse the landlord's own negligence, or agree to liquidated damages except as allowed by ORS 90.302. Those clauses are unenforceable.
The cost: if you knowingly use and try to enforce a prohibited clause, the tenant can recover actual damages plus up to three months' rent.
The class topic that prevents it: Oregon rental agreements and essential addendums.
7. Mishandling last month's rent
Under ORS 90.300, a last month's rent deposit counts as a security deposit, and prepaid rent needs its own separate accounting at move-out. Treating last month's rent as ordinary income, or rolling it into a single accounting with the deposit, causes problems later.
The cost: a disputed or late accounting can trigger the same twice-the-amount penalty as mistake 1.
The class topic that prevents it: deposits and prepaid rent, part of our operations classes.
8. Occupancy rules that are too strict
ORS 90.262 says an occupancy guideline can't be more restrictive than two people per bedroom and must be reasonable, considering bedroom size, overall unit size, and any discriminatory impact on people protected under ORS 659A.421.
The cost: an overly strict limit can become a familial status fair housing complaint.
The class topic that prevents it: screening and rental agreements.
9. Self-help: lockouts and shutoffs
Changing the locks, removing a tenant's belongings, or shutting off heat, water or electricity to force someone out is never allowed. Oregon evictions go through the court process.
The cost: under ORS 90.375, the tenant can recover up to two months' rent or twice their actual damages, whichever is greater, and get possession back.
The class topic that prevents it: ending a tenancy, which covers the court process step by step.
10. Skipping the receipt or leaving the deposit off the lease
ORS 90.300 requires a receipt for any security deposit the tenant pays, and a written rental agreement must list the deposit. It sounds small until a tenant disputes how much they paid.
The cost: it's your word against theirs, which is a bad place to start a deposit dispute.
The class topic that prevents it: rental agreements and move-in paperwork.
The thread that runs through all 10
Look back at the list and you'll notice something: nearly every mistake is about a clock (31 days, 90 days, 14 days), a form (the accounting, the notice, the receipt) or a rule that changed (the rent cap and termination rules have both been rewritten in recent years). That's exactly what good landlord education is built around. Here's the form, here's the clock, here's what the court looks for.
Also worth a refresher: notices only count if they're delivered correctly. ORS 90.155 controls how written notices are served, including when mail-and-attachment service or email service is allowed. Our post on Oregon rental law basics is a good starting point.
and now a couple shameless plugs.
If you manage your own rentals, the cheapest insurance you can buy is a class. Browse the current schedule at RPM Education.
And if you'd rather hand off the parts that carry the most risk, like notices and evictions, Northwest Real Estate and Property Management (NWRPM) offers full management and eviction processing.
Make your own top-10 list
Before your next lease signing, renewal or move-out, ask: which of these 10 Oregon landlord law mistakes am I most likely to make? Pick the one that makes you most nervous and start there. One class on the right topic now is a lot cheaper than one hearing later.
For more, see Oregon landlord legal compliance essentials.
This post is general education, not legal advice. Talk with a qualified Oregon attorney about your specific situation.
Christian Bryant
President of both the Portland Area Rental Owners Association (PAROA)
Join PAROA for Oregon landlord forms and member support while you manage your own rentals.
Own rentals in the Portland Metro or Central Oregon areas? Hire NWRPM for full management or eviction processing.
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