Lease Addendums and Riders: Quebec Enforceability

Leases & Agreements Quebec 3 min read · published June 24, 2026 Flag of Quebec

Lease addendums and riders can change important terms in your rental agreement, and knowing what is enforceable helps tenants protect their housing in Quebec. This guide explains in plain language how Quebec law treats addenda, what makes a rider binding, key red flags to watch for, and step-by-step options if you disagree. You will find tenant-focused examples, references to the Tribunal administratif du logement and the Civil Code, and practical tips for documenting concerns and using official forms to resolve disputes. Read on to learn simple actions you can take to keep control of your tenancy and limit risk when an extra clause is proposed.

What are addendums and riders?

An addendum or rider is extra written wording attached to a lease that changes, clarifies, or adds obligations for the landlord or tenant. Common topics include pets, subletting, renovations, or extra fees. In Quebec, these extra clauses cannot override mandatory protections in the Civil Code or rules set by the Tribunal administratif du logement (Tribunal administratif du logement)[1] and should be read carefully before you sign.

An addendum that conflicts with mandatory law is generally not enforceable.

When is an addendum binding in Quebec?

An addendum is most likely binding when it is clear, signed by the parties, and does not conflict with mandatory legal protections. Below are common criteria that tribunals and courts will consider.

  • Signed by both the landlord and the tenant, showing mutual agreement.
  • Does not include illegal or prohibited terms under the Civil Code of Quebec (Civil Code)[2].
  • Is clear about any rent, deposit, or additional fees and who pays them.
  • Explains repair and maintenance responsibilities or who pays for specific changes.
  • Is provided with proper written notice or a signed written amendment rather than a verbal request.
Keep a signed copy of every addendum with your original lease to avoid future confusion.

Red flags tenants should watch for

Some clauses appear in addenda to attempt to shift legal responsibilities or limit tenant rights. Watch for unclear language, unexpected fees, or clauses that try to remove basic habitability obligations.

  • Clauses that attempt to waive your right to a safe, well-maintained home.
  • New or vague fees, deductions from deposits, or rent-like charges not in the original lease.
  • Terms that change entry or inspection rules without clear limits or notice requirements.
Do not sign any addendum you do not fully understand or that removes core protections without written explanation.

Practical steps before signing

Before you agree to an addendum, take these simple steps.

  • Take time to read the clause and note any deadlines for responding.
  • Ask the landlord to explain unclear wording and get any promises in writing; see What Tenants Need to Know After Signing the Rental Agreement for post-signing tips.
  • Document the condition of the unit and keep receipts or photos of any agreed work.
  • Request a written amendment that specifically replaces only the clause you want changed rather than vague blanket language.
Save emails and signed pages in a dedicated folder so you can find evidence quickly if needed.
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FAQ

Can a landlord add terms after I signed the lease?
No. After signing, new terms are not binding unless both parties agree in writing; if a landlord tries to impose a change, you can negotiate, refuse, or seek help from the Tribunal administratif du logement [1].
Are pet addendums enforceable in Quebec?
Yes, pet clauses can be enforceable if they are clear, reasonable, and do not conflict with law. However, a clause that unreasonably bans a service animal or removes habitability rights may be challenged.
What if I refuse to sign an addendum?
You can refuse. If the landlord insists, document the exchange, offer a counterproposal, and, if needed, file a formal request or dispute with the Tribunal using official forms to resolve the matter [3].

How-To

  1. Read the proposed addendum carefully and underline unclear phrases.
  2. Contact your landlord to ask for clarification or a specific written change.
  3. Gather records: emails, photos, receipts and the original lease to support your position.
  4. Use the Tribunal forms to file a request if you cannot resolve the issue informally [3].
  5. Attend any hearing or mediation and bring your documents to explain why a clause should not apply.

Help and Support / Resources


  1. [1] Tribunal administratif du logement
  2. [2] Civil Code of Quebec (Code civil du Que9bec)
  3. [3] Tribunal administratif du logement - Forms and fees

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Marie Dubois
Marie Dubois

Bilingual Housing Rights Advisor, Tenant Rights Canada

Marie covers tenant rights across Quebec and the Atlantic provinces in both English and French. With a background in Quebec civil law and residential tenancy, she is a trusted voice on the Tribunal administratif du logement process and francophone tenant rights.