Most people don’t think about occupancy laws until there’s a problem. Then it’s too late. Whether you’re a renter, a landlord, or just moving in with roommates, knowing Washington’s rules can save you from fines, eviction, or a fair housing lawsuit.
This guide breaks it all down in plain English. No legal jargon, no confusion.
What Are Occupancy Laws?
Occupancy laws decide how many people can legally live in a home or rental unit. They exist to protect health, safety, and fair housing rights.
Think of them like a speed limit for your living space. Go over the limit, and you could face serious consequences. Stay within it, and everyone is protected.
Washington doesn’t have one single statewide number that applies everywhere. Instead, the rules come from a mix of state law, local building codes, and federal fair housing guidelines. That’s where things get interesting.
The Basic Occupancy Standard in Washington
Wondering how many people are allowed in your apartment? Here’s the rule most cities in Washington follow.
Most local governments use what’s called the “2 plus 1” rule. That means two people per bedroom, plus one extra person for the whole unit. So a one-bedroom can have up to three people. A two-bedroom can have up to five people.
Pretty straightforward, right?
This guideline comes from a 1998 federal document called the Keating Memo, issued by the U.S. Department of Housing and Urban Development (HUD). Washington landlords and cities have used it as a starting point ever since.
But here’s the key thing. The “2 plus 1” rule is a guideline, not a hard law. Local building codes and the size of your actual unit can change what’s allowed.
Washington’s State Law on Occupancy
Washington’s main rental law is the Residential Landlord-Tenant Act, also called RCW 59.18. This law covers most of the rights and rules between landlords and tenants in the state.
Here’s the thing though. RCW 59.18 does not set specific occupancy numbers. It does not say “you can have exactly four people in a two-bedroom.” That’s left to local codes and fair housing rules.
What the state law does do is require landlords to follow local occupancy standards. It also protects tenants from retaliation if they report unsafe housing conditions, including overcrowding.
Stay with me here. This next part matters a lot.
Under RCW 64.90.575, homeowners associations (HOAs) cannot set their own occupancy limits just to restrict the number of people in a unit. Exceptions exist for short-term rentals and limits that come directly from building codes. But HOAs cannot make up arbitrary rules to push people out.
The Role of Building Codes
Okay, pause. Read this carefully.
The only truly “safe harbor” occupancy limit in Washington is one based on building code. That means a limit tied to the physical capacity of the building itself.
For example, a septic system might only be approved to handle a certain number of people. A room might be too small to legally count as a bedroom. These limits are based on real health and safety measurements.
In Seattle, a bedroom must be at least 70 square feet for two occupants. Add 50 more square feet for each additional person after that. Your city may have similar rules. Check your local housing code to find out.
Local building departments in cities like Seattle, Spokane, and Tacoma may have stricter rules than the general statewide guidelines. Always check with your local code enforcement office to know for sure.
Fair Housing Laws and Occupancy
Here’s where it gets interesting. And honestly, this is the part most people miss.
Federal fair housing law protects families with children. It became illegal in 1974 to discriminate based on “familial status.” That means landlords cannot set an unusually low occupancy limit just to keep families with kids out.
If a landlord says only two people can live in a large three-bedroom apartment, that could be considered discrimination. A couple with four young children asking to rent a spacious unit should not automatically be turned away based on occupancy rules alone.
The law says landlords must be flexible. A rigid “two per bedroom” policy that ignores unit size, building capacity, and the ages of occupants could violate fair housing law. That kind of complaint can result in fines and legal action against the landlord.
You’re not alone if this seems complicated. A lot of landlords get this wrong too.
City-Specific Rules Worth Knowing
Washington is a big state, and cities have some of their own rules. Here are a few you should know about.
In Seattle, the city’s Roommate Ordinance allows a tenant, their immediate family, one additional non-family resident, and that person’s immediate family to live together, as long as the total stays within federal, state, or local limits.
In Tacoma, landlords are actually required to include the building-code-based occupancy limit right in the lease. That means no guessing. The number must be stated in writing before you sign.
In Bellevue, Edmonds, and other cities, there have been specific rules limiting “unrelated” occupants. However, courts have found that these rules can have a discriminatory effect. Many of these policies have been challenged and updated over time.
A friend of mine looked up the rules in her city recently. She assumed the limit in her three-bedroom was six people. Turned out her city had a stricter limit based on square footage. She had to renegotiate with her landlord. Don’t get caught off guard like that.
What Happens If You Violate Occupancy Rules
So what happens if you break this rule? Let’s talk about the penalties.
If a landlord believes you have too many occupants, they must give you written notice first. Under Washington law, this is a 10-Day Notice to Comply or Vacate. It gives you ten days to fix the problem before further action is taken.
Think of it like a warning ticket, but more serious. You have a chance to respond.
If you do not fix the issue within that window, the landlord can file an unlawful detainer action. That’s the legal term for an eviction lawsuit. It goes through Washington Superior Court in your county.
Eviction in Washington is not instant. Courts require landlords to follow every step correctly. As of July 27, 2025, under House Bill 1003, eviction notices must now include an exact compliance date. If the notice is missing that date, it may be invalid.
For renters, getting an eviction on your record is a big deal. It can make it much harder to rent in the future. This is one situation where you really do not want to wait and see what happens.
Can Your Landlord Set Their Own Occupancy Limits?
Yes, but with limits. Literally.
Landlords can set “reasonable” occupancy limits. But the word “reasonable” is doing a lot of work in that sentence.
A limit is considered reasonable if it is based on things like the size of the bedrooms, the overall square footage of the unit, the building code, and the capacity of systems like septic tanks. It cannot be based on personal preference or a desire to exclude certain types of people.
Honestly, this is the part that trips up a lot of landlords. Setting an overly strict limit without solid justification can open the door to a fair housing complaint.
If you think a landlord’s occupancy limit is too low and is being used to discriminate, you can contact the Washington State Human Rights Commission or, in Seattle, the Seattle Office for Civil Rights.
Roommates, Subletting, and Guest Rules
Not sure if your guest counts as an occupant? Let me break it down.
Roommates and subletters count toward the occupancy limit. If you are adding someone new to your home, check your lease first. Many leases require landlord approval before you bring in another permanent resident.
Guests are different. A guest who stays for a few days or even a couple of weeks is typically not considered an occupant. But most leases define what counts as a “guest.” If someone is living there full-time, paying bills, or keeping all their belongings there, that is basically an occupant, not a guest.
If your lease requires approval for adding residents, get that approval in writing. A text message or email works. Just make sure you have a record.
How to Check Your Occupancy Limit
You’re gonna love this one. Finding your limit is easier than you think.
Start with your lease. Tacoma landlords are required to include the limit in writing. Other landlords often do too.
Next, contact your city or county’s code enforcement or housing department. Most have websites where you can look up rules for your address. You can also call them directly and ask for the occupancy limit for your unit based on building code.
In Seattle, you can use the Seattle Department of Construction and Inspections (SDCI) online portal to report housing issues or ask questions.
If your landlord’s occupancy limit seems off or lower than what the building code allows, you can request the applicable limit in writing. Keep that document with your lease.
When in doubt, ask a tenant clinic. Washington has free legal help available through organizations like the Northwest Justice Project. They can tell you exactly what applies to your address.
Frequently Asked Questions
How many people can legally live in a one-bedroom apartment in Washington?
Most cities follow the “2 plus 1” rule, which allows up to three people in a one-bedroom unit. However, local building codes and unit size can affect this number.
Can my landlord evict me for having too many people in my apartment?
Yes, but only after giving you a 10-Day Notice to Comply or Vacate. You have a chance to fix the issue before eviction proceedings begin.
Do children count toward the occupancy limit?
Yes, children count as occupants. However, fair housing laws protect families with children from overly strict limits that could amount to discrimination.
Can an HOA limit how many people live in my unit?
Under RCW 64.90.575, HOAs cannot set occupancy limits beyond what local building codes and health and safety laws require. They cannot make up their own numbers to restrict residents.
What if I think my landlord’s occupancy limit is discriminatory?
You can file a complaint with the Washington State Human Rights Commission or the Seattle Office for Civil Rights if you live in Seattle. A tenant rights organization can also help you review your situation.
Does subletting affect my occupancy limit?
Yes. Anyone living in your unit, including subletters, counts toward the occupancy total. Adding someone without landlord approval may also violate your lease terms.
Final Thoughts
Now you know the basics. Washington’s occupancy laws are not as simple as one magic number. They depend on your city, your building, and how many rooms you have.
The “2 plus 1” rule is a good starting point. But always check your local codes and your lease. If a situation arises, act quickly. A 10-day window goes fast.
Stay informed, know your rights, and when in doubt, reach out to a tenant rights organization or a lawyer.
