Key Lease Addendums Tenants Should Check in Washington

Before signing or renewing a rental agreement in Washington, it’s essential to know which lease addendums can affect your rights as a tenant. Understanding these documents can help you avoid surprises and ensure you’re protected under state law.

What Is a Lease Addendum?

A lease addendum is a document that becomes part of your official rental agreement after you and your landlord sign it. While a lease outlines general rental rules, an addendum covers specific terms such as pet policies, smoking restrictions, maintenance responsibilities, or special fees. In Washington, any addendum must comply with the Residential Landlord-Tenant Act (RCW 59.18) and cannot waive your minimum legal protections.^[1]

Common Lease Addendums Washington Tenants Should Watch For

Not all addendums are standard. Here are some that Washington renters frequently encounter. Ask questions before signing and keep copies for your records.

• Pet Addendum: Details restrictions, deposits, or conditions for having pets.
• Mold Disclosure Addendum: Landlords must provide information about mold prevention and may require tenant responsibilities for reporting moisture issues. See details from the Washington Attorney General.
• Smoking/Vaping Addendum: Specifies whether and where smoking or vaping is allowed.
• Lead-Based Paint Disclosure: Federal law requires this for buildings built before 1978. Washington landlords commonly include the lead-based paint disclosure form.
• Maintenance/Early Entry Addenda: Outline how requests are handled, timelines, and advance notice for landlord entry.
• Late Fee Addendum: Specifies late payment charges. Washington has limits on these fees. Refer to the Residential Landlord-Tenant Act for details.^[1]
• Pest Control Addendum: Explains if/when treatment is required and who pays.
• Move-In/Move-Out Checklist Addendum: This records the unit’s condition and is required for security deposit protection. Landlords must use this at move-in and move-out. See below for the official form required.

Important Official Forms for Washington Renters

You have the right to receive and review certain addendums and disclosures. Here are two key forms Washington tenants should be aware of:

• Condition Check-In Checklist (No official form number)
  • When to Use: Before moving in, your landlord must give you this checklist when collecting a security deposit. It should describe the rental’s condition room by room.
  • How to Use: Fill out and sign with your landlord. Both of you should keep a copy. This helps protect your deposit if there are disputes about damage at move-out.
  • Download the sample Condition Checklist from the Attorney General
• Lead-Based Paint Disclosure Form (EPA Form 747-K-99-001)
  • When to Use: Required for units built before 1978 before lease signing.
  • How to Use: Both landlord and tenant must sign this form. You should also receive a government pamphlet about lead hazards.
  • Access the EPA Lead Disclosure Form

Are Lease Addendums Negotiable?

Most addendums can be discussed with your landlord. If you disagree with a term or fee in an addendum, talk openly and document your discussions in writing. All changes should be approved by both parties, then signed and dated.

Your Rights Regarding Lease Addendums in Washington

Washington law protects tenants from unfair or illegal lease modifications:

• Landlords cannot force you to sign an addendum that waives your legal protections under the Residential Landlord-Tenant Act.
• Any addendum that contradicts state law is not enforceable.
• Leases and addendums must be provided in writing.

If you believe an addendum is unlawful or have concerns, you can contact Washington’s civil courts or request help from local tenant advocacy groups.

How to Respond if You Disagree with a Lease Addendum

If you disagree with a proposed addendum, consider these steps:

• Ask your landlord for clarification in writing.
• Propose revisions you find fair.
• If necessary, get legal advice from tenant resources or the state Attorney General’s office.
• Refuse to sign until you’re comfortable. You cannot be forced to accept illegal terms.

Clear and calm communication usually leads to the best outcomes.

FAQ About Lease Addendums for Washington Renters

1. Do landlords have to use official forms for addendums in Washington?
   While there is no requirement for a standard addendum template, specific forms—such as the Move-In Checklist and Lead-Based Paint Disclosure—are required by law for certain situations.
2. Can an addendum increase my rent?
   Addendums can specify future rent increases if both parties agree, but increases must comply with your original lease and state/local regulations. Landlords must also provide written notice as required by Washington law.^[1]
3. What if my landlord adds an addendum after I sign the lease?
   Any addendum introduced after both parties sign the lease requires your agreement to be valid—you cannot be forced to accept new terms mid-lease.
4. Are pet addendums legal in all parts of Washington?
   Yes, but the landlord can set reasonable conditions. However, assistance animals are protected by law and cannot be prohibited.
5. What should I do if I think an addendum violates my rights?
   Contact the Washington Attorney General’s Landlord-Tenant Division or your local courthouse for guidance.

Need Help? Resources for Renters

• Washington Attorney General – Landlord-Tenant Information: Guides, forms, and complaint process
• Washington State Courts: Where to file disputes or seek protection
• King County Tenant Resources: Local support and legal referrals
• Washington Residential Landlord-Tenant Act (RCW 59.18): Official legislation

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1. Washington Residential Landlord-Tenant Act (RCW 59.18)
2. Washington State Attorney General – Landlord-Tenant Information

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