Landlord Consent to Lease Assignment in an Ontario Business Purchase

If you're the one buying a business that leases its premises, there's a step in the deal you can't fully control from your side of the table: convincing the landlord to sign off on you as the new tenant. Landlord consent to lease assignment is often treated as paperwork, but from a buyer's chair it's closer to a second, parallel negotiation — one where you're the applicant, not the dealmaker.

This article looks at the process from the buyer's side: what a landlord typically wants to see from you, how to prepare for it, and how it fits alongside your financing and closing timeline.

Why This Isn't Just Between You and the Seller

A lease is a contract between the landlord and the current tenant. Buying the business doesn't automatically make you a party to that contract — the lease has to be formally assigned to you, and most commercial leases require the landlord's consent first. Under Ontario's Commercial Tenancies Act, where a lease restricts assignment without consent, that consent is deemed not to be unreasonably withheld, unless the lease itself says otherwise. That protects you from an arbitrary refusal, but it doesn't remove the requirement to actually apply for, and receive, consent before you can rely on the space.

What a Landlord Typically Wants to See From You

Because the landlord is being asked to accept a tenant it didn't originally choose, expect to be evaluated much like a new tenant applying for a lease from scratch:

• Financial statements or references showing you (or your company) can support the ongoing rent obligation.
• A personal guarantee, particularly if you're operating through a newer or thinly capitalized corporation — landlords commonly want a guarantee that stands behind the lease the way the seller's did.
• A business plan or explanation of intended use, confirming your plans fit within the lease's permitted-use clause.
• Identification of who will actually sign — if you're buying with partners or investors, the landlord will want clarity on who the tenant (and any guarantor) will be.

Pulling this package together before you approach the landlord — rather than scrambling once a deadline is looming — is the single biggest thing a buyer can do to keep this step from becoming the bottleneck in the deal.

Fitting This Into Your Financing and Closing Timeline

1. Start early, as soon as your offer is firm enough to share the key deal terms with the landlord. This is not a step to leave until days before your scheduled closing.
2. Loop in your lender, if you're financing the purchase. Lenders financing a business purchase often want confirmation that the lease assignment is secured — or at least well underway — before advancing funds, since your ability to operate from the premises affects the value of what they're lending against.
3. Expect back-and-forth, not a single yes/no answer. Landlords commonly respond with proposed conditions rather than an outright grant or refusal, and there may be a round or two of negotiation over guarantees or minor lease updates.
4. Get consent in writing before you rely on it, and make sure your purchase agreement doesn't require you to close before that written consent is in hand.
5. Keep the seller in the loop. The seller is the current tenant and often has an existing relationship with the landlord that can help move things along faster than a buyer approaching cold.

If You're Also Taking Over a Personal Guarantee

Many small business leases carry a personal guarantee from the seller (or the seller's principals) backing the tenant's obligations. When the lease is assigned, the landlord will typically want your own guarantee in its place — and separately, you should confirm in writing whether the seller's original guarantee is actually being released, since an assignment on its own does not automatically release the outgoing guarantor unless the landlord agrees to that release specifically.

Frequently asked questions