When a Landlord Refuses to Consent to a Lease Assignment During a Business Sale in Ontario

For a lot of small businesses, the location is the business — a restaurant's corner spot, a retail shop's foot traffic, a service business's proximity to its customers. So when a business sale depends on transferring the commercial lease to the buyer, and the landlord balks, the entire deal can suddenly be at risk.

The good news is that Ontario law doesn't leave tenants entirely at a landlord's mercy here. The bad news is that the protection is narrower and more fact-dependent than most people assume. This article explains where the legal line sits and what buyers and sellers can actually do when a landlord digs in.

The Legal Starting Point: What the Lease Says Controls First

Before anything else, the actual lease document governs. Many commercial leases include a clause prohibiting assignment or subletting without the landlord's consent. Ontario's Commercial Tenancies Act addresses exactly this kind of clause: where a lease contains a covenant against assignment or subletting without consent, the Act implies a proviso that the landlord's consent is not to be unreasonably withheld — unless the lease expressly provides otherwise.

That last part matters enormously. If the lease itself says the landlord may withhold consent in its "sole and absolute discretion," or otherwise expressly displaces the reasonableness standard, the statutory implied proviso may not apply the way a tenant would hope. Reading the actual assignment clause — not just assuming a general reasonableness rule applies — is the essential first step.

What Counts as "Unreasonably" Withholding Consent

Where the reasonableness standard does apply, there's no fixed checklist in the statute for what makes a refusal reasonable or unreasonable — it's assessed on the specific facts of each case. That said, the kinds of concerns landlords typically raise, and how they tend to be viewed, include:

• Concerns about the buyer's financial strength or experience operating the business. A landlord's genuine, documented concern about the incoming tenant's ability to pay rent or operate the space competently is generally considered a legitimate basis for scrutiny — though the landlord still can't invent unreasonable hurdles designed simply to block the transfer.
• A change in the nature of the business. If the buyer intends to operate a materially different type of business than the use permitted or contemplated under the lease, a landlord's objection carries more weight.
• Using the assignment as leverage for unrelated demands. A landlord who conditions consent on the tenant agreeing to unrelated lease amendments, a rent increase not tied to any actual change in circumstances, or other demands unconnected to the assignment itself is on much weaker ground.
• Simple delay or non-response. A landlord who neither consents nor gives a reasoned refusal, and instead lets the request sit unanswered, creates real uncertainty for a pending sale — and may itself be treated as unreasonable conduct depending on the facts and the lease's own notice requirements.

Because this is genuinely fact-specific, don't assume either side of a dispute is automatically right — get the actual lease and the landlord's stated reasons reviewed together.

What Buyers and Sellers Can Do

1. Approach the landlord early — before the purchase agreement is finalized, if possible. A landlord blindsided close to closing is far more likely to dig in than one who's been kept in the loop.
2. Give the landlord what a reasonable request would need. Financial statements, a business plan, references, and evidence of relevant experience all help address the most common legitimate landlord concerns before they become objections.
3. Put the assignment request in writing, and keep a clear record of the landlord's response (or lack of one) and stated reasons for any refusal — this record matters enormously if the dispute escalates.
4. Ask the landlord, in writing, for the specific reasons behind a refusal. A landlord who won't articulate a reason is in a weaker position to later argue the refusal was reasonable.
5. Consider negotiating directly — sometimes an improved security deposit, a personal guarantee from the buyer, or a short-term probationary arrangement resolves a landlord's genuine concerns without a legal fight.
6. Build a lease condition into the purchase agreement, so the deal itself is structured to accommodate a delayed or refused consent, rather than leaving the parties to improvise if it happens.

If the Landlord Still Won't Budge

If a landlord's refusal genuinely appears unreasonable and the lease's wording supports the statutory reasonableness standard, the tenant (seller, since the lease is typically still in the seller's name until assignment) may have grounds to challenge the refusal — potentially including seeking a declaration that consent has been unreasonably withheld, or damages for losses caused by the refusal. This kind of dispute takes time to resolve, which is exactly why it's worth trying every negotiated option first, and building realistic timelines into the purchase agreement in case a lease dispute isn't resolved by the intended closing date.

If the landlord's consent is legitimately refused on reasonable grounds — say, real and well-documented concerns about the buyer's ability to operate the business — the parties may need to consider whether the deal can proceed without keeping the current location, whether a different buyer entity might satisfy the landlord, or whether the deal simply cannot close as structured.

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