Oregon Manufactured Home Park Rent Increase Limits & Protections — Landlord Compliance Guide (2026)

Oregon’s Manufactured Home Park Rent Increase Cap: What You Need to Know

Oregon landlords managing manufactured home parks operate under one of the nation’s strictest rent control regimes. Unlike general residential rentals, where Oregon has limited statewide controls, spaces in manufactured home parks are subject to mandatory rent increase caps under ORS 90.600. This statute applies to any park with 10 or more spaces and creates hard limits on how much you can raise rent annually.

As of 2026, the cap remains at 7% or the Consumer Price Index (CPI) plus 2 percentage points, whichever is lower. This means even if inflation is running 5%, you cannot charge the full 7% if CPI + 2% equals 6.5%. The annual recalculation and strict notice requirements make non-compliance a constant risk, particularly for self-managing landlords juggling multiple parks.

The legal and financial stakes are high. Unlawful rent increases can trigger tenant lawsuits under ORS 90.735, resulting in actual damages, treble damages, court costs, and attorney fees. Oregon’s courts have consistently held that rent control violations are material breaches of the implied covenant of good faith and fair dealing, and the state attorney general’s office actively investigates park management complaints.

Statute Overview: ORS 90.600 and ORS 90.725

ORS 90.600: Rent Increase Limitations

ORS 90.600 is the foundational statute governing rent increases in parks with 10 or more spaces. The law is straightforward but requires precise compliance:

Requirement	Rule
Annual Increase Cap	7% or CPI + 2%, whichever is lower
Parks Subject to Cap	10 or more rental spaces; exempts single-space parks
Notice Period	120 days written notice before increase takes effect
What Counts Toward Cap	Rent for the space only; utilities and optional services excluded
New Tenancy Exemption	Applies to spaces occupied less than 1 year; capped tenancies begin after 12-month anniversary
First Increase Timing	No cap on initial rent at new tenancy; cap begins after 1 year of occupancy

The statute defines “rent” narrowly as the charge for use of the space itself. This is critical: you cannot increase rent beyond the cap and then add a “facility charge,” “park maintenance fee,” or “amenity surcharge” as a workaround. Oregon courts have repeatedly struck down such tactics under the doctrine of substance over form. If the charge is fundamentally for the right to occupy the space, it is rent and subject to the cap.

ORS 90.725: Prohibited Rent Increase Practices

ORS 90.725 works in tandem with ORS 90.600 to prohibit specific practices. It bars rent increases that:

• Exceed the statutory cap without proper cause
• Are implemented without 120 days’ written notice
• Are retaliatory in nature (in response to tenant complaints, requests for repairs, or exercise of legal rights)
• Deliberately disguise the increase as fees, utilities, or services

Retaliation is a particular trap. If a tenant requests maintenance, files a complaint with the housing authority, or asserts any legal right within six months before a rent increase, the burden shifts to you to prove the increase was not retaliatory. This presumption of retaliation is strict and difficult to overcome. Even if your increase is within the statutory cap and properly noticed, if it occurs within the retaliation window and lacks a documented business reason, you may face liability.

How to Calculate the Allowable Rent Increase

Step 1: Determine the CPI Figure

Oregon uses the Portland-Salem-Vancouver Consumer Price Index (All Urban Consumers, all items) to calculate the CPI component. This index is published monthly by the U.S. Bureau of Labor Statistics. For annual increases, you use the 12-month average or the year-over-year change, depending on your contract language and local practice.

As of August 2026, the CPI component is approximately 2.8%, making the CPI + 2% formula equal 4.8%. Since 4.8% is lower than the 7% ceiling, the allowable increase cap is 4.8%. However, verify the exact CPI figure for your notice date by checking the Bureau of Labor Statistics website or consulting an accountant, as the index updates monthly.

Step 2: Compare 7% to CPI + 2%

Whichever is lower is the cap. If CPI is 6%, then CPI + 2% = 8%, which exceeds 7%, so you use 7%. If CPI is 3%, then CPI + 2% = 5%, so you use 5%. This formula ensures that in deflationary or low-inflation periods, tenants receive additional protection.

Step 3: Apply to Current Rent Only

Multiply the current space rent by the allowable percentage. For example, if a tenant’s current rent is $1,200 per month and the allowable increase is 4.8%, the new rent is $1,200 × 1.048 = $1,257.60.

Step 4: Document and Issue Notice

Once you’ve calculated the increase, prepare a formal written notice. The notice must clearly state:

• The current rent amount
• The new rent amount
• The date the new rent takes effect (minimum 120 days from delivery)
• The calculation method (if you wish to demonstrate compliance)
• Instructions for payment

Deliver the notice by certified mail, personal delivery, or according to the method specified in the lease. Keep a copy and proof of delivery in your records.

The 120-Day Notice Requirement: Non-Negotiable Compliance Deadline

ORS 90.600 mandates 120 days’ written notice before any rent increase takes effect. This is not a guideline; it is a statutory requirement. Failure to provide 120 days’ notice voids the rent increase entirely, and you cannot collect the increased amount. Worse, the tenant may pursue you for damages under ORS 90.735.

What “Days” Means

The 120-day period is counted from the date of delivery, not the date you prepared the notice. If you mail a notice on June 1 but the tenant doesn’t receive it until June 5, the 120-day period starts June 5. If you hand-deliver on a specific date, that date is day zero, and day 120 arrives 120 calendar days later.

When to Issue Notice: Annual Timing

Most parks increase rent on an anniversary date (e.g., the date the tenant moved in, or January 1 each year). Plan your notice accordingly:

• If your anniversary is January 1: Issue notice by September 3 at the latest to allow the 120-day window
• If your anniversary is the tenant’s move-in date: Calculate backward 120 days from that date to determine the deadline for issuing notice
• If you miss the deadline: The increase is void. You cannot retroactively collect the difference or demand it at the next opportunity

Delivery Methods and Proof

The notice must be delivered in person, by certified mail, or by the method specified in the lease agreement. Always document delivery:

• Certified Mail: Request return receipt; retain the green card and USPS tracking
• Personal Delivery: Have the tenant sign a receipt; photograph or scan it
• Lease-Specified Method: If the lease allows email or posting, use that method but retain proof of sending/posting with timestamps

If you cannot prove the notice was delivered 120 days before the increase took effect, you cannot enforce it. Burden of proof falls on you, not the tenant.

Exemptions and When the Cap Does NOT Apply

New Tenancies (First 12 Months)

ORS 90.600 exempts rent increases for spaces occupied for less than one year. This means you can set any rent price for a new tenant moving into a space, without regard to the cap. However, once that tenant completes 12 months of occupancy, all subsequent increases must comply with the cap and notice requirements.

Critical timing issue: The cap applies based on the anniversary of occupancy, not calendar years. If a tenant moves in on March 15, 2025, the cap takes effect on March 15, 2026, not January 1, 2026.

Single-Space Parks

Parks with fewer than 10 rental spaces are exempt from ORS 90.600. If you manage a 7-space or 9-space park, you may increase rent without the statutory cap, but you must still provide reasonable notice (typically 30 days minimum under general Oregon law) and comply with retaliation prohibitions.

Owner-Occupied Parks

If the park owner occupies one of the spaces, the exemption still applies to the owner’s space, but all other spaces remain subject to the cap.

Utilities, Fees, and Services: What’s NOT Subject to the Cap

The rent increase cap applies only to the charge for the space. You may charge separately for utilities, trash, water, sewer, and optional services without triggering the cap. However, you must segregate these charges clearly on the lease and billing statements.

What You CAN Increase Without the Cap

• Utilities (if tenant-paid and metered or reasonably apportioned)
• Trash collection (if charged separately)
• Water and sewer (if separately billed)
• Parking (if listed as an optional add-on and separately charged)
• Pet fees or deposits (within reason)
• Optional amenity charges (pool, fitness center, Wi-Fi — if truly optional)

The Rent-Disguise Problem

You cannot circumvent the cap by relabeling rent as a “facility maintenance fee” or “park improvement charge.” Oregon courts apply a substance-over-form test: if the charge is mandatory and covers the right to occupy the space, it is rent. Disguising rent as fees exposes you to treble damages and attorney fees under ORS 90.735.

Reasonable Utility Increases

If you provide utilities to tenants (rather than tenants paying the utility directly), you may increase the utility component of the bill in response to actual increases in your utility costs. However, you must document the cost increase and apply it proportionally across all tenants. Unexplained spikes or selective increases invite disputes and potential retaliation claims.

Retaliation Protections: The Six-Month Window

Oregon’s retaliation statute, ORS 90.385, creates a rebuttable presumption that a rent increase is retaliatory if it occurs within six months after a tenant:

• Requests repairs or maintenance
• Reports code violations or safety hazards
• Files a complaint with a housing agency
• Contacts a tenant rights organization
• Asserts any legal right under the lease or Oregon law
• Participates in tenant organizing or union activity

If a rent increase falls within the six-month window, you bear the burden of proving it was not retaliatory. “We needed to increase rent for profitability” is not a sufficient defense. You must show a documented, independent business justification, such as:

• Significant capital improvements to the park (with records and invoices)
• Increased property taxes (with tax assessments)
• Increased insurance premiums (with policy documents)
• General market rate analysis showing the increase is in line with comparable parks

The safest practice is to avoid issuing any rent increase notice within six months of a tenant complaint or repair request. If you must increase rent, document your business reasons contemporaneously and in writing before the tenant makes any complaint.

Calculating and Recording Your Compliance Timeline

Use this checklist to ensure timely, compliant notice:

Action	Deadline	Documentation
Verify park qualifies (10+ spaces)	Before first increase	Count of rental spaces; deed or park map
Check CPI + 2% formula	30 days before notice date	BLS CPI print-out; written calculation
Determine allowable increase %	30 days before notice date	Written memo (7% vs. CPI + 2%, whichever lower)
Check for retaliation window	Before issuing notice	Tenant complaint log; 6-month lookback
Issue written 120-day notice	120+ days before increase takes effect	Certified mail receipt or hand-delivery receipt
Retain proof of delivery	Date of mailing/delivery	USPS tracking, green card, or signed receipt
Increase takes effect	120+ days after notice	Updated rent roll; tenant billing records

Penalties and Legal Consequences for Non-Compliance

Civil Damages Under ORS 90.735

A tenant harmed by an unlawful rent increase can sue you under ORS 90.735. The statute provides for:

• Actual damages: The difference between the unlawful increase and the lawful amount, plus interest
• Treble damages: In cases of knowing, willful, or reckless violations, the court may triple the actual damages award
• Attorney fees: The prevailing tenant recovers reasonable attorney fees and court costs
• Injunctive relief: A court order stopping the unlawful increase and requiring compliance

Example: You issue a 30-day notice for a $100/month increase instead of 120 days. The tenant sues. Actual damages = 12 months × $100 = $1,200. With treble damages, the judgment is $3,600, plus $4,000 in attorney fees and court costs. Total exposure: $7,600+.

Enforcement by Oregon’s Attorney General

The Oregon Attorney General’s office receives complaints about manufactured home park violations regularly. While the state does not criminally prosecute rent control violations, civil enforcement actions can result in:

• Cease-and-desist orders
• Restitution to affected tenants
• Civil penalties of up to $1,000+ per violation (in egregious cases)
• Required compliance monitoring and quarterly reporting

Loss of Credibility and Future Litigation Risk

A single violation creates a pattern in the eyes of tenant advocates, legal aid organizations, and future tenants. One improper increase can trigger a lawsuit that exposes your entire rent history to scrutiny. Courts view repeated violations as a sign of deliberate non-compliance, increasing the likelihood of treble damages awards.

Best Practices for Self-Managing Landlords

Maintain a Compliance Calendar

Use a spreadsheet or property management platform that tracks:

• Each tenant’s occupancy anniversary (when the cap begins)
• The deadline to issue 120-day notice for the next increase
• The current CPI + 2% figure (updated monthly)
• Any tenant complaints or repair requests (to avoid retaliation window)

LeaseBase’s lease operations module tracks these dates and alerts you to compliance deadlines, eliminating the guesswork.

Separate Rent from Utilities and Fees

On the lease and all billing documents, list the rent amount separately from utilities, trash, water, and any optional services. This clarity prevents disputes and demonstrates your good faith compliance.

Document Your CPI Calculation

Before issuing any notice, print the relevant CPI figure from the Bureau of Labor Statistics website and file it with your notice. This creates a clear record that you applied the statute correctly and will defend you against claims of arbitrary increases.

Consult a Local Attorney Before Your First Increase

A one-hour consultation with an Oregon real estate attorney costs $150–$300 and can prevent a $7,600+ lawsuit. The attorney can review your lease language, explain local enforcement patterns, and bless your notice before you send it.

Use Certified Mail for All Rent Increase Notices

Hand-delivery is faster but harder to prove. Certified mail with return receipt creates a dated, irrefutable record of delivery. The extra $8–$10 per notice is insurance.

Implement a Complaint Log

Keep a dated record of any maintenance requests, tenant complaints, or communications regarding repairs. When the time comes to issue a rent increase notice, you can review the log and ensure you are outside the six-month retaliation window. If you cannot safely increase rent, wait or document a compelling business reason before proceeding.

Interaction with Other Oregon Tenant Protections

Relationship to General Rent Increase Rules (ORS 90.323)

Oregon’s general rent control statute (ORS 90.323) caps rent increases on standard residential rentals at 7% or CPI + 2% annually. Manufactured home parks fall under a specialized regime (ORS 90.600) that is similar but stricter in notice requirements and enforcement. The notice period for general rentals is 30 days; for parks, it’s 120 days. Always apply the more restrictive rule.

Habitability and Essential Services

ORS 90.320 requires landlords to maintain essential services (heat, water, electricity, plumbing). You cannot justify a rent increase by claiming the tenant must accept poor conditions. If a park is not habitable, tenants can withhold rent or break the lease without penalty, regardless of your rent increase notice.

Termination Rights and the Rent Increase Connection

Tenants in parks can challenge an unlawful rent increase by refusing to pay and invoking it as an affirmative defense in an eviction action. The court will examine the legality of the increase before enforcing an eviction for non-payment. If the increase is unlawful, the eviction fails.

Frequently Asked Questions

Q: Can I increase rent more than once per year?

A: No. ORS 90.600 specifies “annual” increases. You cannot issue multiple notices in a single 12-month period. If you issued a notice in January with an increase effective April 1, the next increase cannot occur until April 1 of the following year. Issuing two notices in a calendar year may be challenged as a retaliation or violation of the annual limitation, even if each individual increase complies with the percentage cap.

Q: What if I made a calculation error and charged too much rent?

A: You must refund the overage immediately upon discovery. Do not wait for the tenant to demand it. Failure to refund constitutes an unlawful rent increase and exposes you to damages and attorney fees. Document the correction in writing to the tenant (e.g., “Corrected rent increase effective [date]; overage of $X per month refunded beginning [date]”), and reduce future rent to the correct amount.

Q: Does the cap apply if my park is incorporated as a nonprofit?

A: Yes. ORS 90.600 makes no exception for nonprofit operators. The cap applies to any park with 10+ spaces, regardless of the owner’s legal structure or tax status.

Q: Can I avoid the cap by converting the park to condominiums and selling the spaces?

A: No. If tenants are still renting the spaces (not owning them), the cap applies. Conversion to condo ownership requires compliance with separate Oregon statutes and does not automatically exempt you from the rent cap during the transition. Consult an attorney before attempting any conversion strategy.

Q: What happens if I issue a notice but the tenant moves out before the increase takes effect?

A: If the tenant vacates before the effective date, the increase does not apply to that tenancy (since there is no tenant). If a new tenant moves in after the vacant period, that new tenant is subject to the new tenancy exemption and can be charged any amount for the first 12 months. However, if the new tenant occupies the space for 12+ months, the cap applies to future increases.

Conclusion: Compliance as a Competitive Advantage

Manufactured home park rent control in Oregon is not negotiable, and the stakes for non-compliance are high. A single improper increase can result in treble damages, attorney fees, and a lengthy litigation process. The 120-day notice requirement, retaliation presumptions, and annual CPI recalculation create multiple opportunities for error.

Self-managing landlords who stay ahead of these requirements—maintaining a compliance calendar, documenting CPI calculations, logging tenant complaints, and using certified mail—avoid litigation and build trust with tenants. For parks with 20+ spaces or multiple rent increase cycles annually, tracking these deadlines manually becomes error-prone. LeaseBase’s compliance engine automates the calculation and notification timeline, alerting you to deadlines months in advance and generating compliant notices that cite the current CPI and applicable statute.

The cost of compliance is far lower than the cost of litigation. Invest 30 minutes per increase in verification and documentation, and you protect $7,600+ in liability exposure.

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Disclaimer: This article is for informational purposes only and does not constitute legal advice. Oregon landlord-tenant law is complex, and enforcement practices vary by county. Consult a qualified Oregon real estate attorney to review your specific lease, park structure, and increase notice before implementation. The information herein reflects ORS statutes as of August 2026 and should be verified against current statutory text and recent case law.