Commercial Lease Amendment Agreement

When a commercial lease needs to change partway through — a rent adjustment, an extended term, a change to the space — you don’t tear up the lease and start again. You amend it. This lease amendment template records the change to an existing commercial lease, keeps the rest of the lease in force, and gives both landlord and tenant a clean signed record of what was altered.

The template names the original lease, identifies the clauses being changed, and sets out the new terms — whether that’s a revised rent, a renewal, a change to the permitted use, or an adjustment to the premises. The confirming language is already drafted: everything not amended stays exactly as it was, and the amendment is read together with the original lease.

It’s written for Canadian commercial tenancies, so it fits alongside a standard commercial lease. You fill in the lease date, the parties, the clauses being amended, and the new wording. If you’re in Ontario, it works as an Ontario lease amendment form; the amendment to lease agreement in Ontario or any other province follows the same structure, with provincial details added where needed.

Download the finished amendment in Word and PDF, both sides sign, and file it with the original lease.

Keep this specific to commercial leases — residential tenancy changes often have to follow a prescribed process and forms set by the province, so don’t repurpose a commercial amendment for a residential tenancy. For a commercial lease, a clear, signed amendment to lease agreement is exactly what you want. Number multiple amendments in sequence and store them with the lease, so the current terms are never in doubt. Fill it in, sign it, and keep the trail clean.