Before you add a roommate
Start by checking your written lease and any clauses about subletting, assignment or sharing the unit. If your lease mentions restrictions, follow those steps first; if it is silent, you still remain responsible for the tenancy. Keep copies of messages and receipts and note who pays what so there is no confusion about rent, utilities or the security deposit. If you have questions about how a clause applies after signing, consult What Tenants Need to Know After Signing the Rental Agreement for practical tips and next steps.
Permission, subletting and assignment
In Ontario the Residential Tenancies Act, 2006 governs subletting and assignment and outlines tenant and landlord rights and responsibilities [1]. Many leases require the landlord's written consent to add a roommate, and a landlord cannot unreasonably withhold consent under certain circumstances. If you need an official ruling, the Landlord and Tenant Board handles disputes and can decide whether a landlord's refusal is reasonable [2]. You can also review Ontario-specific rights in Tenant Rights and Landlord Rights in Ontario to understand obligations on both sides.
Practical checklist
- Review the lease and document any clauses about subletting, assignment or guest limits.
- Ask the landlord in writing for permission and keep the email or signed note as proof.
- Agree in writing how rent, utilities and deposits will be split and who is responsible for late payments.
- Clarify access, keys and privacy expectations with the roommate and landlord.
Screening and documentation
When you add a roommate, treat the process like finding a co-tenant: check references, confirm income or ability to pay, and document the move-in condition with photos and a signed checklist. If you collect any portion of the security deposit on behalf of the landlord, record the amount and provide receipts. Consider a simple written roommate agreement that covers rent share, utilities, chores and how to handle damage or repairs.
When a landlord refuses permission
If the landlord refuses without a clear or lawful reason, you can ask for a written refusal and the reason. If you still disagree, you may file an application to the Landlord and Tenant Board using the appropriate application forms to request a decision [3]. Keep all correspondence and evidence, such as messages, receipts and the proposed roommate's references, to support your case.
Common scenarios
Temporary sublet
When you plan to be away and want someone to occupy your room, describe the dates and responsibilities clearly and ask the landlord if a short-term sublet is allowed under your lease. Leave written instructions for rent payments and utilities and collect a security deposit if agreed with the landlord.
Adding a long-term roommate or assigning a lease
Assignment transfers tenancy rights and can require formal consent; adding a roommate usually keeps the original tenant legally responsible. If you want to transfer the tenancy fully, discuss an assignment with the landlord and confirm any required steps under the Residential Tenancies Act, 2006 [1].
FAQ
- Do I need permission to add a roommate?
- Usually yes. Many leases require written landlord consent for subletting or adding occupants, and you should follow the lease and document any permission.
- What if my landlord refuses to allow a roommate?
- If the refusal appears unreasonable, you can ask for a written reason and apply to the Landlord and Tenant Board for a decision if needed.
- Can my roommate be added to the lease so they share legal responsibility?
- Yes, with the landlord's agreement you can add or replace tenants on the lease through assignment; this often requires a written change to the agreement or a new lease signature.
How-To
- Review your lease and document any clauses about subletting, assignment or occupant limits.
- Ask the landlord in writing for permission and propose a clear arrangement for rent and utilities.
- Agree on rent splitting, deposits and responsibility for utilities in a written roommate agreement.
- Document the unit condition with photos and a move-in checklist signed by both parties.
- If the landlord refuses, gather evidence and file the relevant application forms with the Landlord and Tenant Board.
Key Takeaways
- Always check and follow the lease and get landlord consent in writing.
- Keep careful records: messages, receipts, photos and any signed agreements.
- If a dispute occurs, the Landlord and Tenant Board can review and decide under the Residential Tenancies Act.
