Own a newer rental property? You might be exempt from Washington’s statewide rent stabilization limits. The law includes significant exceptions for recently constructed buildings and certain owner-occupied properties—but exemption from the cap doesn’t mean exemption from all requirements.

This guide explains which properties qualify for exemptions, what rules still apply even to exempt properties, and how to determine your property’s status.

The 12-Year New Construction Exemption

Washington’s rent cap doesn’t apply to properties that received their certificate of occupancy within the last 12 years. This rolling exemption means that buildings constructed in 2013 or later are currently exempt from the state’s rent stabilization limits.

The policy rationale is straightforward: rent control can reduce the incentive to build new housing. By exempting newer construction, the law aims to maintain development incentives while still providing protections for tenants in older buildings.

For investors, this creates interesting opportunities. Properties built within the exemption window offer more pricing flexibility than older stock. However, the exemption is time-limited—a building that’s exempt today will age out of exemption as years pass.

Owner-Occupied Property Exemptions

The rent cap also doesn’t apply to certain owner-occupied properties. If you live in one unit of a duplex, triplex, or fourplex and rent out the others, those rental units are exempt from rent stabilization limits.

Similarly, if you own a single-family home and rent out no more than two units—including accessory dwelling units (ADUs) or DADUs—you’re exempt from the rent cap.

These exemptions reflect the law’s focus on larger, non-owner-occupied rental properties while providing flexibility for smaller-scale landlords who live on-site.

What Exempt Properties Must Still Do

Here’s what catches some landlords off guard: exemption from the rent cap doesn’t mean exemption from all rental regulations.

Notice Requirements Still Apply: Even if your property is exempt from the rent cap, you must still provide 90 days’ notice (or more, depending on local ordinances) before increasing rent. The extended notice period is a separate requirement from the cap itself.

Official Forms May Still Be Required: The requirement to use official state forms for rent increase notices may apply regardless of exemption status.

Local Ordinances Apply: Exemption from the state rent cap doesn’t exempt you from stricter local regulations. If you’re in Seattle, you still need 180 days’ notice. If you’re in certain King County cities, the 120-day requirement for increases over 3% still applies.

Move-In Limits, Late Fee Caps: Other provisions of the Housing Stability Act—like limits on move-in fees and late fee caps—generally apply regardless of exemption status.

How to Determine Your Property’s Status

Confirming whether your property qualifies for an exemption requires checking specific documentation.

For the new construction exemption, you need the certificate of occupancy date. This is available from the local building department or permitting office. Calculate whether 12 years have passed from that date.

For owner-occupancy exemptions, you must actually live in the property. Using it as a vacation home or maintaining legal residence elsewhere may not qualify. The exemption applies based on your actual living situation, not just ownership structure.

Strategic Considerations

Understanding exemptions can inform investment strategy. Newer buildings offer more rent flexibility, which may command premium prices. Owner-occupied small multifamily properties provide both housing and income with rent flexibility. ADU and DADU investments in Snohomish and King Counties may qualify for exemptions while adding rental income.

However, the time-limited nature of the new construction exemption means that pricing advantages will eventually sunset. Investment analysis should account for the transition from exempt to regulated status.

Get Clarity on Your Properties

At inTrust Property Management, we help landlords understand which regulations apply to their specific properties. Our team can research certificate of occupancy dates, evaluate exemption eligibility, and ensure that even exempt properties comply with the requirements that still apply.

Not sure if your property is exempt? Let us help you figure it out. Visit intrustpmc.com or call 425-438-3474 for guidance on your rental properties.