Ontario Subletting and Assignment Rules 2026

Subletting and assignment in Ontario run on a province-specific workflow. The Residential Tenancies Act, 2006 and the Landlord and Tenant Board (LTB) set what a tenant may do, the standard a landlord must meet when deciding, and the difference between a sublet and an assignment. This 2026 guide gives landlords and property managers the practical framework — anchored to the stable rules, with a reminder to confirm any charge or timeline that changes.

The law and tribunal to build around

For Ontario, anchor every subletting policy to the Residential Tenancies Act, 2006 and the Landlord and Tenant Board (LTB). Multi-province portfolios get into trouble when a team copies a sublet or assignment clause from another jurisdiction — Ontario, Québec, and BC each treat these transfers differently, and a rule that is correct in one province can be a breach in another.

The first operating rule is to put the province name at the top of every consent checklist. The second is to separate business judgment (whether a particular replacement tenant works for the property) from legal procedure (the standard the Act holds you to when you answer).

What a tenant may do, and your consent standard

The stable Ontario rules to build around:

A tenant may sublet or assign the unit, but generally requires the landlord's consent.
That consent cannot be arbitrarily or unreasonably withheld — a landlord must have a genuine, reasonable basis to say no, not a pretext.
A sublet and an assignment are different: in a sublet the original tenant leaves temporarily and returns; in an assignment the original tenant transfers the tenancy and does not return.
Specific charges and timelines that may attach to a consent request can change — confirm current figures and deadlines before you rely on them.

Sublet vs assignment — why it matters

The distinction drives who is on the hook. In a sublet, the original tenant stays legally responsible and expects to come back, so you are approving a temporary occupant. In an assignment, the original tenant hands off the tenancy entirely, so you are effectively taking on a new tenant on the existing terms. Decide which one is in front of you before you evaluate the request — approving an "assignment" as if it were a sublet, or vice versa, muddies who owes rent and who has the right to occupy.

For managers, the practical file should capture which type of transfer was requested, the incoming person's details, the date the request came in, and the decision with its reasons.

Keep the request and decision in writing

Because the standard is "not unreasonably withheld," the record is your defence. Keep the consent request and the decision in writing. If you decline, write down the reasonable basis at the time you decide — not after a dispute starts. If you consent, note any conditions. A written trail is what turns a business judgment into defensible evidence if the tenant challenges the refusal at the LTB.

Common mistakes

Avoid refusing a sublet or assignment on a vague or arbitrary basis, confusing a sublet (tenant returns) with an assignment (tenant transfers), handling the request only verbally, or applying a charge or timeline you have not confirmed is current. Each of these weakens your position at the LTB.

Managing this in software

Your system should record the transfer type on each request, timestamp when it arrived, capture the decision and its reasons, and store the written consent or refusal against the tenancy. Prompt the operator to state a reasonable basis before a refusal can be finalized, and leave charge and timeline fields as confirm-current inputs rather than hard-coded values. Treat a consent decision as a compliance event with a written rationale, not just an inbox reply.

How Proprietio helps

Proprietio keeps the sublet or assignment request, your decision, and the reasons in one place, and tracks who is on the hook for rent after the change — so consent is documented and the ledger stays right. See how on your portfolio — free rental audit.

Sources

Ontario — Landlord and Tenant Board. Confirm the current consent standard, any applicable charges, and subletting and assignment timelines on the official LTB pages before acting.

⚠️ This is general information, not legal advice. Residential tenancy is provincial — verify with the named tribunal or a local lawyer before acting.