No, you do not have to sign a lease addendum during an active fixed-term lease. An addendum modifies your existing contract, and like any contract change, it requires both parties to agree. If you refuse, the terms you originally signed stay in place until the lease ends. What changes the answer is timing, tenancy type, and a small set of disclosures that federal law requires regardless of what either party wants.
Timing Decides Almost Everything
Whether you can safely say no depends on where you are in your lease.
During a fixed-term lease, your landlord can propose changes, but you can decline them. The landlord agreed to the original terms for the full lease period, and so did you. Neither side can unilaterally rewrite the deal. An addendum slipped under your door in month four of a twelve-month lease is a proposal, not an order.
At renewal, the calculus shifts. Your landlord can present updated terms and, in effect, say these are the conditions for a new lease period. You can accept, negotiate, or decline and move out when the current lease ends. A landlord who gives proper written notice of new terms at renewal is not acting improperly. The original contract is ending on its own, and a new one is being offered.
Month-to-month tenancies sit between the two. Because either party can typically end a month-to-month arrangement with 30 days’ notice (some jurisdictions require longer), a landlord can propose new terms and give notice that the current arrangement ends if you do not agree. You are not forced to sign, but refusing can lead to the tenancy ending after the notice period runs out.
What Happens If You Refuse
If you decline to sign an addendum during your fixed-term lease, the original lease continues to govern. Your landlord cannot enforce the proposed changes, raise your rent unilaterally, or add new fees just because they appear in a document you did not sign. That is the legal position.
The practical position has more texture. Refusing an addendum can strain the relationship. Some landlords respond by becoming more rigid about enforcing every clause in the existing lease, or by choosing not to renew when your term ends. A landlord who simply declines to offer a renewal after the lease expires is generally within their rights, assuming no rent control or anti-discrimination issues apply. A landlord who tries to evict you mid-lease for refusing an addendum is on much shakier ground.
Eviction based solely on refusing to sign an addendum is unlikely to succeed. A judge will typically ask whether the tenant violated the existing lease, not whether the tenant cooperated with proposed changes to it. The narrow exception is when the addendum addresses a genuine safety or legal compliance issue the landlord has an independent obligation to act on.
When Federal Law Requires the Disclosure Anyway
A few documents that look like addendums are not optional for either party. If your landlord hands you one of these, the question is not whether you must sign, but whether the document meets what the law requires.
Lead-Based Paint Disclosure
If your rental was built before 1978, federal law requires your landlord to attach a lead-based paint disclosure to the lease before you are obligated under the agreement. The disclosure must include a specific Lead Warning Statement, information about any known lead hazards in the unit, and any available reports or records about lead paint on the property. Your landlord must also provide a federally approved pamphlet on lead poisoning prevention. This is not a term the landlord is choosing to add; it is a legal requirement, and failing to include it exposes the landlord to significant liability.1eCFR. 24 CFR Part 35 Subpart A – Disclosure of Known Lead-Based Paint and/or Lead-Based Paint Hazards Upon Sale or Lease of Residential Property
Assistance Animals and No-Pet Addendums
Under the Fair Housing Act, landlords must make reasonable accommodations for tenants with disabilities, including allowing assistance animals in properties with no-pet policies. If you have a disability-related need for an assistance animal, your landlord cannot refuse the request simply because a lease addendum or house rule prohibits pets. An assistance animal is not a pet under federal law. The landlord also cannot charge a pet deposit or pet fee for an assistance animal, though you remain liable for any damage the animal causes.2U.S. Department of Housing and Urban Development (HUD). Assistance Animals
A landlord can deny the request only in narrow circumstances: if the specific animal poses a direct threat to health or safety that other accommodations cannot eliminate, if granting the request would impose an undue financial burden, or if it would fundamentally change the nature of the housing provider’s operations.2U.S. Department of Housing and Urban Development (HUD). Assistance Animals
Service Members: Watch for SCRA Waivers
Active-duty military members have additional protections under the Servicemembers Civil Relief Act. Some landlords include SCRA waiver language inside lease addendums, and signing one could strip you of the right to terminate your lease early without penalty when you receive deployment or permanent change of station orders. Under the SCRA, you can end a housing lease by providing written notice and a copy of your military orders at least 30 days before the planned termination. The lease then terminates 30 days after the next rent payment is due.3Military OneSource. Military Clause: Terminate Your Lease Due to Deployment or PCS
Never sign an addendum that waives your SCRA protections without consulting a military legal assistance office first. If your lease does not already include a military clause, you can also ask your landlord to add one that provides protections beyond the baseline SCRA rights.
Your Three Options
You are not limited to yes or no when an addendum lands on your table.
- Accept and sign, if the changes are reasonable and you want to keep the relationship steady. Read everything first.
- Negotiate. Counter-propose in writing. If the landlord wants to raise rent by $150, offer $75 or ask for something in return, such as a longer lease term or a repair. Referencing comparable rents or the cost of tenant turnover can move the needle.
- Decline. During an active fixed-term lease, the original terms remain enforceable, and your landlord cannot penalize you for refusing.
Most tenants leave value on the table by skipping the middle option. Landlords generally propose addendums expecting some pushback.
Retaliation After You Say No
Most states have anti-retaliation laws that prevent landlords from punishing tenants for exercising their legal rights. If your landlord raises your rent, cuts services, or files for eviction shortly after you refused to sign an addendum or filed a complaint, that pattern may amount to illegal retaliation. Common signs include sudden code complaints initiated by the landlord, refusal to make repairs, or a notice to quit served within days of a dispute.
If you believe your landlord is retaliating, you can file a complaint with your state or local housing authority. These agencies investigate allegations of illegal practices and can impose penalties on landlords who violate housing laws.4USAGov. How to File a Complaint Against a Landlord If the retaliation involves discrimination based on race, color, religion, sex, national origin, disability, or familial status, you also have the option of filing a Fair Housing complaint with HUD.5eCFR. 24 CFR Part 103 – Fair Housing Complaint Processing
Keep Everything in Writing
Good records are your best protection. If your landlord proposes an addendum, keep the exchange in writing even when the initial conversation happens in person or over the phone. Follow up verbal discussions with an email summarizing what was said.
Hold onto the original lease, any proposed addendums whether you signed them or not, and all correspondence about the changes. If you negotiate alternative terms, get the final version in writing, signed and dated by both parties, and keep your own copy. If a dispute later reaches a housing authority or a courtroom, that paper trail is what the decision will turn on.