Insights Hub
Commercial Lease Insights
What Ontario businesses should know about commercial lease clauses, rent structures, repairs, renewal options, assignment, default and disputes.
Commercial leases are negotiated documents, not standard-form consumer contracts — which means the terms can vary enormously from one lease to the next, and small differences in wording can carry a real cost over a multi-year term.
This hub covers the clauses that matter most in an Ontario commercial lease: how rent and operating costs are structured, who's responsible for repairs, how renewal options actually work, and what happens when something goes wrong.
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More guides in this hub
Commercial Lease Renewals and Options to Renew in Ontario
How renewal options are typically structured, when they need to be exercised, and what to negotiate ahead of time.
Commercial Lease Disputes in Ontario: Rent, Repairs, Default and Termination
The most common sources of commercial lease disputes, and how they're typically addressed.
Personal Guarantees in Commercial Leases: What Ontario Business Owners Should Know
Explains why landlords require personal guarantees from owners of small/new corporate tenants, the difference between limited and unlimited guarantees, negotiating caps or sunset clauses, and what happens to the guarantor on default.
Triple Net (NNN) Leases in Ontario Explained
Breaks down what “net, net, net” means (base rent plus property tax, insurance, and CAM), how NNN differs from gross/modified gross leases, how CAM reconciliation works, and what to check before signing.
Assigning or Subletting a Commercial Lease in Ontario
Covers the difference between assignment and subletting, why commercial leases can validly require “sole discretion” landlord consent, change-of-control clauses, and the original tenant’s lingering liability after a transfer.
Ending a Commercial Lease Early in Ontario
Explains early termination/break clauses, negotiating a surrender, using assignment or subletting as an alternative exit, the financial risk of simply walking away, and demolition/relocation clauses.
Rent Escalation Clauses in Ontario Commercial Leases
Explains how fixed-percentage, CPI-indexed, and fair-market-value rent escalation clauses work in Ontario commercial leases, how they’re negotiated, and how tenants can budget for them.
Leasehold Improvements in Ontario: Who Pays and Who Owns Them?
Covers tenant allowances, who owns fixtures and improvements during and after a commercial lease, make-good/restoration obligations, and the general tax treatment of leasehold improvements in Ontario.
Commercial Tenant Eviction and Landlord Remedies in Ontario
Explains why commercial tenancies fall outside the Landlord and Tenant Board process, and how distress, re-entry/forfeiture, and suing for arrears work as faster commercial landlord remedies under Ontario law.
Co-Tenancy Clauses in Ontario Commercial Leases
Explains clauses letting a tenant reduce rent or terminate if an anchor tenant or minimum occupancy level isn’t maintained, why landlords resist them, and how they’re structured/negotiated.
Exclusivity Clauses in Ontario Commercial Leases
Covers clauses barring a landlord from leasing to a competing business, how scope and geographic radius are defined, and remedies for breach.
Insurance Requirements in Ontario Commercial Leases
Covers CGL, tenant contents/business interruption, and landlord building insurance, minimum coverage negotiation, additional-insured status, and proof-of-insurance obligations.
Retail vs. Office vs. Industrial Leases in Ontario: Key Differences
Compares how lease clauses differ by property type — percentage rent/CAM in retail, build-out allowances in office, loading/zoning/environmental issues in industrial.
Negotiating a Commercial Lease in Ontario: Key Points
Practical negotiation points — base vs. additional rent, renewal options, assignment flexibility, guarantee caps, exclusivity, termination rights — and why the first draft favours the landlord.
Letters of Intent for Commercial Leases in Ontario
Explains how an LOI frames the proposed rent, term, and conditions before a formal commercial lease is drafted in Ontario, and which of its clauses are typically binding.
Percentage Rent Clauses in Ontario Commercial Leases
Explains how percentage rent adds a share of gross sales above a breakpoint to base rent in Ontario retail leases, and the reporting and audit rights landlords typically require.
Default and Cure Periods in Ontario Commercial Leases
Explains what counts as a monetary or non-monetary default under an Ontario commercial lease, typical notice-and-cure structures, and the consequences of an uncured default.
Estoppel Certificates in Ontario Commercial Leases
Explains what an estoppel certificate confirms, why landlords’ lenders and purchasers request them, and what a tenant should check before signing one.
Environmental Clauses in Ontario Commercial Leases
Explains why Ontario commercial leases include environmental compliance and indemnity clauses, tenant obligations around spills and assessments, and how the Environmental Protection Act framework interacts with the lease.
Related Tools
Practical tools for this topic
Contract review checklist
A structured pass through the clauses that most often cause problems later.
Agreement comparison checklist
A side-by-side way to compare two drafts or two competing offers.
Evidence checklist for a contract dispute
What to gather and preserve as soon as a disagreement becomes likely.
FAQ
Commercial Leases: frequently asked questions
What's the difference between gross rent and net rent?
Gross rent generally bundles most operating costs into a single payment, while net rent (sometimes triple net) has the tenant pay base rent plus a share of costs like property tax, insurance and common area maintenance separately.
Are commercial tenants protected by the Residential Tenancies Act?
No. Commercial leases in Ontario fall outside the Residential Tenancies Act, which means the parties have much more freedom to negotiate terms — and much less built-in statutory protection.
What is an option to renew, and is it automatic?
A renewal option gives a tenant the right, but not an automatic entitlement, to extend the lease on specified terms. It usually has to be exercised in writing within a set window before the lease ends.
Can a landlord refuse to let a tenant assign or sublease?
It depends on the lease. Many commercial leases allow assignment or subleasing only with the landlord's consent, which is often required to not be unreasonably withheld — though the exact standard depends on the wording used.
Understand your agreement. Know your next step.
Ontario-wide, plain-English contract law information — built to help you make sense of your situation before you decide what to do next.