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Corporate · Checklist · 6 min

Lease assignment checklist: taking over a commercial lease on a business purchase

Everything to check in the lease, ask the landlord and put in the purchase agreement before you take over an Ontario commercial lease.

Last reviewed September 4, 2026 · Updated September 4, 2026

Everything to check in the lease, ask the landlord and put in the purchase agreement before you take over an Ontario commercial lease.

⚖️ This is general information, not legal advice. It can't account for your specific situation. Use it to get oriented, then confirm the details with a licensed Ontario lawyer.

For most small businesses the lease is the most valuable contract and the hardest to replace. Taking it over means the landlord's consent, an assignment and assumption agreement, usually a guarantee and, if you are careful, an estoppel certificate. Section 23 of the Commercial Tenancies Act says a landlord's consent to assign is not to be unreasonably withheld unless the lease says otherwise, but the lease sets the process and the landlord sets the pace. Use this checklist from the first week of diligence, not the last week before closing.


Read the lease

Ask the landlord

Put in the purchase agreement

Franchise premises

Where a franchisor holds the head lease and sublets to the franchisee, or holds a conditional assignment of the lease so it can step in if the franchisee fails, the franchisor's consent is needed as well as the landlord's. Check that the sublease term matches the franchise term, whether the franchisor's rights over the premises survive the transfer, and who pays the landlord's costs. The two consents are usually processed together, and the closing cannot happen until both are signed.

On closing


How Treadstone Law can help

A lease taken over well is invisible: the rent is paid, the term runs and nobody hears from the landlord. Most of the work is done before the application is sent, by reading the lease properly and asking for the estoppel certificate early.

Treadstone Law handles corporate matters on a transparent flat fee, with online intake and a real lawyer on your file, across Ontario.


This is not legal advice

This guide is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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Official resources

Government and regulator sources for this topic. Rules change — confirm the current position before you rely on it.

Official resources

Government and regulator sources for this topic. Rules change — confirm the current position before you rely on it.

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These guides are general information, not legal advice. Reading one does not create a lawyer–client relationship. For advice about your situation, speak with a licensed lawyer — call 1-844-900-1070.

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