Key Takeaways
- HB 1217 caps annual rent increases at 7% + CPI (max 10%) for most Washington rentals, effective July 1, 2025
- The 2026 cap is 9.683% based on the Seattle-Tacoma-Bellevue CPI-U of 2.683%
- Landlords must provide 90 days’ written notice using the standardized state notice form
- No rent increase allowed during the first 12 months of tenancy, and only one increase per 12-month period
- Exemptions exist for new construction (12 years), owner-occupied small buildings (4 units or fewer), and nonprofits
- The law includes just cause eviction protections with 17 enumerated causes under RCW 59.18.650
- HB 1217 sunsets in 2040 unless extended by the legislature
What Is HB 1217? Washington’s First Statewide Rent Cap
On May 7, 2025, Governor Bob Ferguson signed House Bill 1217 into law, making Washington the ninth state in the country to enact statewide rent stabilization. The law took effect on July 1, 2025, and fundamentally changes how landlords across Washington can set and adjust rents.
For years, Washington landlords operated with virtually no state-level restrictions on rent increases. That era is over. HB 1217 introduces a formula-based cap on annual rent increases, standardized notice requirements, vacancy decontrol provisions, and reinforces the state’s just cause eviction framework. Whether you own a single rental unit in Spokane or a 50-unit building in Seattle, this law affects how you operate.
This guide breaks down every provision landlords need to understand, with practical compliance steps you can implement immediately.
The Rent Cap Formula: 7% + CPI (Max 10%)
HB 1217 limits annual rent increases to the lesser of:
- 7% + the annual change in CPI (Consumer Price Index for All Urban Consumers, Seattle-Tacoma-Bellevue area), or
- 10%
The CPI figure used is the 12-month percentage change published by the Bureau of Labor Statistics for the Seattle-Tacoma-Bellevue metropolitan statistical area. The Washington Department of Commerce publishes the maximum allowable increase each July for the following 12-month period.
2025-2026 Cap Rates
| Period | CPI Component | Base | Maximum Allowable Increase |
|---|---|---|---|
| July 1, 2025 – June 30, 2026 (transitional) | N/A | N/A | 10.0% |
| July 1, 2026 – June 30, 2027 | 2.683% | 7% | 9.683% |
The transitional 10% cap for the first year was built into the legislation to give landlords time to adjust. Starting in 2026, the formula-based cap takes over, and the Department of Commerce will publish the official rate each July.
How This Compares to Other States
| State | Formula | 2026 Cap |
|---|---|---|
| Washington (HB 1217) | 7% + CPI (max 10%) | 9.683% |
| California (AB 1482) | 5% + CPI (max 10%) | ~7.7–8.8% (varies by region) |
| Oregon | 7% + CPI (no hard cap) | 9.5% |
| Colorado | Varies by locality | Varies |
Washington’s formula most closely mirrors Oregon’s, but with a hard 10% ceiling that Oregon lacks. California’s formula is stricter with a lower 5% base. In practice, Washington landlords have more room to adjust rents than their California counterparts.
The 90-Day Standardized Notice Requirement
HB 1217 requires landlords to provide at least 90 days’ written notice before any rent increase takes effect. This applies statewide, though several cities impose longer notice periods that supersede the state minimum.
The notice must be delivered using a standardized form prescribed by the Washington Department of Commerce. This is not optional — using your own format, even if it contains all the required information, does not satisfy the law. The standardized form must include:
- The current rent amount
- The new rent amount
- The effective date of the increase
- The percentage increase
- The maximum allowable increase for the current period
- Information about tenant resources, including the Department of Commerce website
Critical detail: Local ordinances in Seattle (180 days), Tacoma (up to 210 days), and Olympia (120-180 days) require longer notice periods. If your property is in one of these cities, you must follow the local requirement. The 90-day state minimum is a floor, not a ceiling.
First 12 Months: No Increase Allowed
HB 1217 prohibits any rent increase during the first 12 months of a new tenancy. This means the rent you set at move-in is locked for the first year, regardless of what happens with CPI or market conditions.
This provision has practical implications for how you price new leases. Because you cannot adjust rent for 12 months, you need to set your initial rent at a level that accounts for expected cost increases over that period. Underpricing a new lease hoping to “catch up” with a large increase at month 13 is exactly the kind of practice HB 1217 constrains.
One Increase Per 12-Month Period
Beyond the first year, landlords are limited to one rent increase per 12-month period. You cannot split a large increase into two smaller ones six months apart — even if both individually fall under the cap.
This means timing matters. If you increase rent effective March 1, 2026, you cannot increase it again until March 1, 2027 at the earliest. Plan your increase timing to align with when you want to lock in the new rate for the next 12 months.
Vacancy Decontrol: Resetting Rent Between Tenants
HB 1217 includes vacancy decontrol, which means the rent cap does not apply when a unit is vacant between tenants. When a tenant moves out voluntarily, you can set the rent for the next tenant at any amount — there is no limit on the initial lease rate.
This is a significant provision that distinguishes Washington’s law from stricter rent control regimes in cities like New York, where vacancy decontrol has been eliminated. For Washington landlords, vacancy decontrol means:
- You can adjust to market rates between tenancies
- Below-market rents from long-term tenants don’t permanently suppress your rental income
- The cap only constrains increases to existing tenants, not your overall pricing
However, vacancy decontrol does not apply if the landlord forces a tenant out through bad faith eviction to reset the rent. Just cause eviction protections (discussed below) are designed to prevent this.
Exemptions: What Properties Are Not Covered
HB 1217 exempts three categories of properties from the rent cap (but not necessarily from the notice requirements):
1. New Construction: The 12-Year Exemption
Properties are exempt from the rent cap for 12 years from the date of the first certificate of occupancy. This is designed to avoid discouraging new housing construction. If your building received its certificate of occupancy in 2020, the rent cap exemption runs through 2032.
Key details:
- The 12-year clock starts from the first certificate of occupancy, not the date construction began or the date you purchased the property
- This applies to the entire building, not individual units
- When the 12-year window expires, the property becomes subject to the full rent cap going forward
- You should retain your certificate of occupancy documentation as proof of your exemption period
For a deeper analysis of how exemptions work, including how to calculate your window and what happens when it expires, see our guide: Is Your Washington Rental Exempt? New Construction, Duplexes, and the 12-Year Rule.
2. Owner-Occupied Small Buildings (4 Units or Fewer)
If you live in the building and it has four or fewer units (duplex, triplex, or fourplex), the rent cap does not apply to the other units. This exemption recognizes that small-scale landlords who share a building with their tenants have a fundamentally different relationship than institutional operators.
Requirements:
- You must actually reside in one of the units as your primary residence
- The building must have no more than four total units
- If you move out, the exemption ends and the rent cap applies
3. Nonprofit Housing
Properties owned and operated by nonprofit organizations are exempt from the rent cap. This primarily affects affordable housing providers and community development organizations that operate under their own regulatory frameworks.
Important: Exemptions Don’t Cover Everything
Even if your property is exempt from the rent cap, you may still be subject to:
- The 90-day notice requirement (or longer local requirements)
- Just cause eviction protections under RCW 59.18.650
- Local ordinances in Seattle, Tacoma, Olympia, and other cities
Exemption from the cap does not mean exemption from all HB 1217 provisions. Read the law carefully and consult with a Washington landlord-tenant attorney if you’re uncertain.
Just Cause Eviction: RCW 59.18.650
HB 1217 reinforces Washington’s existing just cause eviction framework under RCW 59.18.650. Landlords can only terminate a tenancy for one of 17 enumerated causes. These fall into several categories:
Tenant-Fault Causes
- Nonpayment of rent (after proper notice)
- Substantial breach of the rental agreement
- Causing or permitting waste or nuisance
- Criminal activity on the premises
- Failure to comply with health or safety obligations
- Refusal to allow lawful landlord access
- Material misrepresentation on the rental application
Landlord-Need Causes (No-Fault)
- Owner move-in (landlord or immediate family member)
- Sale of the property to a buyer who intends to occupy
- Substantial rehabilitation requiring vacancy
- Demolition of the building
- Conversion to non-residential use
- Compliance with a government order
Other Causes
- Tenant has been given proper notice and the tenancy is month-to-month (with specific restrictions)
- Expiration of a fixed-term lease where the landlord provides proper notice of non-renewal
For no-fault causes, landlords may be required to provide relocation assistance depending on the locality. Seattle’s EDRA (Economic Displacement Relocation Assistance) is the most significant local relocation requirement. See our guide on Seattle EDRA relocation payments for details.
The 2040 Sunset
HB 1217 includes a sunset provision that expires the law on July 1, 2040, unless the legislature acts to extend it. This 15-year window gives the state time to evaluate whether rent stabilization achieves its intended goals without permanently constraining the housing market.
For comparison, California’s AB 1482 was originally set to expire in 2030 but was extended to 2035 by AB 12. Washington’s legislature may take similar action as 2040 approaches. Landlords should plan for at least 15 years of compliance.
How to Comply: Step-by-Step
Here is a practical compliance checklist for Washington landlords:
- Determine if your property is exempt. Check whether your building qualifies for the new construction (12-year), owner-occupied small building, or nonprofit exemption. Document your exemption status.
- Check the current cap rate. Visit the Washington Department of Commerce website each July for the updated maximum allowable increase. For 2026, the cap is 9.683%.
- Calculate your maximum increase. Multiply your current rent by the cap percentage. For a $2,000/month unit in 2026: $2,000 x 9.683% = $193.66 maximum increase. Use our Washington Rent Cap Calculator for quick calculations.
- Check local requirements. If your property is in Seattle, Tacoma, or Olympia, you must follow local notice periods and relocation assistance requirements that exceed the state minimums. See our comparison guide: Tacoma vs Seattle vs Olympia rent rules.
- Use the standardized notice form. Download the official form from the Department of Commerce. Do not use your own template.
- Provide at least 90 days’ notice (or longer if required locally). Count calendar days from delivery, not mailing date, unless serving by mail (add 3 days for mailing).
- Track the 12-month rule. Record the effective date of each rent increase. You cannot increase rent again until 12 months have passed.
- Do not increase rent during the first 12 months of a new tenancy. Your initial lease rate is locked for the first year.
- Document everything. Keep copies of all notices, delivery confirmations, certificate of occupancy (if claiming exemption), and rent increase history for each unit.
- Review just cause requirements. Ensure any lease termination or non-renewal complies with the 17 enumerated causes under RCW 59.18.650.
“Washington landlords went from one of the least regulated states to one of the most regulated in a single legislative session. The compliance burden is real, but manageable if you build the right systems. The landlords who struggle are the ones who keep running their properties like it’s 2024.”
— Rachid Abadli, Founder & CEO at LeaseBase
Common Compliance Mistakes to Avoid
Based on the experiences of landlords in other rent-capped states (California, Oregon), here are the most common mistakes Washington landlords should watch for:
1. Using the Wrong Notice Form
HB 1217 requires the standardized notice form. A letter that contains all the right information in the wrong format is not compliant. Download and use the official form.
2. Miscounting the Notice Period
Ninety days means 90 calendar days before the increase takes effect. If you serve by mail, add 3 days. If your property is in Seattle (180 days), Tacoma (up to 210 days), or Olympia (120-180 days), use the local requirement.
3. Exceeding the Cap Accidentally
The cap changes every year. An increase that was legal last year may exceed the cap this year if CPI drops. Always check the current year’s cap before issuing any increase.
4. Increasing Rent During the First Year
The 12-month prohibition on increases for new tenancies is absolute. No exceptions for “catching up” to market rates or covering unexpected cost increases.
5. Ignoring Local Overlays
The state law is the floor, not the ceiling. Seattle, Tacoma, and Olympia all have additional requirements that go beyond HB 1217. Multi-city landlords need to track different rules for each property.
Frequently Asked Questions
When did HB 1217 take effect?
HB 1217 was signed by Governor Bob Ferguson on May 7, 2025, and took effect on July 1, 2025. The first year (July 2025 – June 2026) uses a transitional cap of 10%. The formula-based cap (7% + CPI) applies starting July 1, 2026.
What is the maximum rent increase in Washington for 2026?
The maximum allowable rent increase for the period beginning July 1, 2026, is 9.683%, calculated as 7% base + 2.683% Seattle-Tacoma-Bellevue CPI-U. Use the Washington Rent Cap Calculator to determine the dollar amount for your specific rent.
Does HB 1217 apply to single-family homes?
Yes, unless the property qualifies for one of the three exemptions (new construction within 12 years, owner-occupied building with 4 or fewer units, or nonprofit-owned). Unlike California’s AB 1482, HB 1217 does not provide a blanket exemption for single-family homes owned by individuals.
Can I raise rent to any amount between tenants?
Yes. HB 1217 includes vacancy decontrol, which means you can set rent at any level when a unit is vacant between tenants. The cap only limits increases to existing tenants during their tenancy.
Does HB 1217 apply to commercial properties?
No. HB 1217 applies only to residential rental properties. Commercial leases are not subject to the rent cap or notice requirements.
What happens if I violate HB 1217?
Tenants can challenge excessive rent increases and recover overcharges. A rent increase that exceeds the maximum allowable amount is void and unenforceable. Tenants may also have claims for damages and attorney’s fees under the Residential Landlord-Tenant Act (RCW 59.18).
How does vacancy decontrol interact with just cause eviction?
You cannot evict a tenant for the purpose of resetting rent. Just cause eviction protections under RCW 59.18.650 prevent bad-faith evictions. If you evict a tenant and re-rent the unit at a higher rate without a legitimate just cause reason, you face liability for wrongful eviction.
When does HB 1217 expire?
HB 1217 sunsets on July 1, 2040. The legislature may extend it before that date, as California did with its rent cap law (AB 1482 was extended from 2030 to 2035).
Stay Compliant Automatically
HB 1217 adds a new compliance layer that Washington landlords have never had to manage before. Tracking cap rates, notice periods, 12-month rules, local overlays, and exemption windows across multiple properties is exactly the kind of operational complexity that leads to expensive mistakes.
LeaseBase tracks Washington rent cap compliance automatically for each of your properties — including the current maximum allowable increase, required notice periods based on your city, and reminders when your notice window opens. You get a clear dashboard instead of spreadsheets and guesswork.







