SUBLEASING and ASSIGNING Commercial Real Estate

Contact our law firm for commercial leasing matters at 905-616-8864 or Chris@NeufeldLegal.com

Navigating the exit or downsizing of a commercial space often brings commercial tenants to a critical fork in the road: should they sublease or assign? While both mechanisms bring a third party into the picture, the legal architecture under each path is fundamentally different. An assignment is essentially a transfer of the tenant’s entire remaining interest under the lease, effectively swapping the original tenant out for a new one. A sublease, on the other hand, creates a secondary, subordinate landlord-tenant relationship where the original tenant carves out a portion of their space or time. This distinction is vital because it dictates who remains on the hook if the rent stops flowing. Generally, under Ontario law, unless the landlord explicitly releases the original tenant during an assignment, that original tenant might still face ongoing liability if the new assignee defaults, a harsh reality that catches many business owners off guard.

The Landlord’s Consent and "Reasonableness"

In Ontario, you cannot simply hand over the keys to a new occupant without checking the rulebook. Most modern commercial leases require the landlord's prior written consent for any transfer. If the lease is silent, Section 23(1) of Ontario’s Commercial Tenancies Act steps in to deem that such consent cannot be unreasonably withheld. But what exactly does "unreasonable" mean? It is rarely a black-and-white calculation. Ontario courts look at the specific facts, focusing on objective factors like the financial reliability of the proposed incoming tenant or whether their intended business use clashes with existing building exclusives. For instance, in cases like Rabin v. 2490918 Ontario Inc., the courts have scrutinized the actual timing and reasons provided by landlords when consent is refused. A landlord cannot use a consent request as an opportunistic leverage point to force a completely new, more expensive lease structure, though they do retain significant latitude to protect their economic interests.

Untangling the Reversionary Interest Trap

Historically, the line between a sublease and an assignment was drawn by a strict, ancient common law rule: a sublease absolutely required the tenant to retain a "reversionary interest," usually by ending the sublease at least one day before the head lease expired. If you sublet for the exact remaining duration, the law automatically treated it as an assignment, regardless of what you named the document. Things became a bit more nuanced following the Ontario Court of Appeal’s ruling in V Hazelton Limited v. Perfect Smile Dental Inc., where the court used Section 3 of the Commercial Tenancies Act to shift the focus toward the actual intention of the parties rather than rigid technical timelines. Even so, relying on judicial interpretation of intent is a risky gamble. Getting caught on the wrong side of this legal distinction can radically alter your rights, impacting everything from your ability to distrain (seize) a subtenant’s property for unpaid rent to your ultimate exposure to the prime landlord.

Practical Implications and Structural Risks

The choice between these structures often hinges on the unique operational goals of the business, but each comes with distinct structural risks. Suppose a retail tenant in Toronto wants to downsize by subdemising a portion of their footprint to a complementary business. A sublease allows them to control the space, pocket the subtenant’s rent, and eventually reclaim the entire square footage if their business rebounds. The catch? They remain fully responsible to the landlord for the entire premises; if the subtenant fails to pay or damages the property, the head tenant absorbs the blow. Conversely, a restaurant owner selling their business as a going concern would almost certainly prefer a clean assignment to the buyer. Yet, if the buyer lacks an established credit history or industry experience, the landlord might legitimately refuse consent, stalling the entire corporate transaction.

Why Tailored Drafting and Representation Matter

Because no two commercial leases are identical, generic templates or a do-it-yourself approach to transfers frequently invite costly litigation. Boilerplate assignment clauses might contain hidden triggers, such as "profit-sharing" provisions that require a tenant to hand over any premium rent collected from a subtenant directly to the landlord. Furthermore, the interplay between corporate share sales, changes of control, and lease transfer clauses creates a maze that requires careful, strategic maneuvering. Ultimately, minor changes in the phrasing of a consent agreement or a sublease contract can dramatically shift millions of dollars in potential liability over a multi-year term. Determining the optimal path forward depends entirely on the specific language of your head lease, the financial health of the incoming party, and the prevailing commercial realities of the given commercial real estate sector. Uncovering the right answer for your specific commercial real estate scenario is a collaborative process that begins by evaluating these variables alongside experienced legal counsel.

For knowledgeable and experienced legal representation with respect to reviewing, drafting, negotiating and instituting commercial lease agreements, for both landlords and tenants, contact our law firm at 905-616-8864 or Chris@NeufeldLegal.com.