Commercial Lease Breach: Damages and Remedies for Landlords in Ontario

Evicting a problem tenant is only half the battle. 

After months of unpaid rent, property damage, or unauthorized alterations, landlords face the critical question: What can I actually recover? 

Ontario law provides commercial landlords with multiple remedies beyond simply regaining possession, but knowing what damages you can claim, how to calculate them, and which enforcement mechanisms work best determines whether you’ll actually collect what you’re owed.

Unpaid rent is just the starting point. 

When commercial tenants breach leases, landlords can pursue several categories of damages. Outstanding rent from the breach date through when the tenant vacates or is evicted forms the foundation of most claims. 

But your losses typically extend far beyond unpaid monthly rent.

Accelerated rent provisions in your lease may let you claim all remaining rent through the lease term immediately. 

If your tenant had three years left on a five-year lease and stopped paying, you might claim the entire remaining three years’ rent upfront rather than waiting to collect month by month. Whether courts enforce these clauses depends on specific wording and circumstances, but they significantly increase your potential recovery.

Lost rent during re-letting periods adds up quickly. 

After evicting a tenant, commercial spaces often sit vacant for months during necessary repairs, marketing, and negotiations with new tenants. You can claim this lost rent as damages, provided you made reasonable efforts to minimize vacancy periods.

Property damage beyond normal wear and tear is recoverable. 

Tenants who punch holes in walls, damage flooring, break fixtures, or leave the space requiring substantial restoration owe you the repair costs. Document everything thoroughly — photos, contractor estimates, and receipts prove your damages.

Costs of re-letting the premises are claimable damages. 

Real estate commissions, legal fees for new lease preparation, advertising costs, and leasehold improvement costs for new tenants all flow from the original tenant’s breach. 

Keep detailed records of every expense incurred because of the breach.

If you’re forced to re-let at lower rent, you can claim the difference. 

You were getting $5,000 monthly; the market now only supports $4,000. The $1,000 monthly shortfall for the remaining original lease term represents your ongoing damages from the breach.

Start with the obvious: unpaid rent. 

Calculate every dollar owed from when the tenant stopped paying through when they left or were evicted. Include base rent, additional rent for operating costs, property taxes, utilities, and any other charges the lease required them to pay.

Add the recovery period losses. 

How long did the space sit empty? What rent did you lose during that period? Be prepared to justify why it took that long: courts expect landlords to actively market vacant spaces and accept reasonable offers rather than holding out indefinitely for perfect tenants.

Factor in repair and restoration costs. 

Get multiple contractor quotes for necessary repairs. Document that damage wasn’t normal wear and tear but resulted from tenant neglect, misuse, or unauthorized alterations. Courts are skeptical of inflated repair estimates, so be realistic and well-documented.

Calculate re-letting expenses. 

If you paid real estate commissions to lease the space again, those are damages. If you provided tenant improvement allowances or concessions to attract a replacement tenant that the original lease didn’t require, those additional costs are damages flowing from the breach.

Include legal and enforcement costs. 

Your legal fees to evict the tenant and pursue damages, court filing fees, sheriff costs for enforcing writs of possession: all recoverable if you ultimately win your case.

Account for rent differential over time. 

If you’re stuck with a lower-paying tenant for the remainder of what would have been the original lease term, multiply that monthly shortfall by the number of remaining months to calculate this damage component.

Sue for breach of contract. 

File a statement of claim in Superior Court seeking judgment for all damages described above. 

The tenant receives notice and can defend. 

If they don’t defend or you win at trial, you get a judgment for the full amount owed. This judgment then allows enforcement against the tenant’s assets, bank accounts, and property.

Use your lease’s guarantee provisions. 

Many commercial leases include personal guarantees from business owners. When the corporate tenant can’t pay, you can pursue the guarantor personally. Their personal assets, homes, and bank accounts become available to satisfy the judgment. This dramatically increases your chances of actual recovery.

Apply rent deposits and last month’s rent. 

Your lease likely required the tenant to provide rent deposits. Apply these immediately to outstanding arrears. They won’t cover everything, but they reduce your net loss while you pursue other remedies.

Pursue set-off against amounts you owe the tenant. 

If you’re holding the tenant’s security deposit or owe them money for any reason, set off your damages against those amounts before refunding anything.

Courts won’t let you sit idle and maximize damages. 

You must take reasonable steps to reduce your losses. This means actively marketing the vacant space, accepting reasonable offers from qualified replacement tenants, making necessary repairs promptly so the space can be re-let, and pricing the space realistically based on current market conditions.

You can’t be picky and blame the original tenant for extended vacancies. 

If you refuse reasonable offers hoping for better tenants or higher rent, courts will reduce your damage award to what you would have recovered had you accepted reasonable offers. 

Document your mitigation efforts meticulously. 

Keep records of every marketing effort, showing schedule, prospective tenant tours, offers received and why you rejected them, market research justifying your asking rent, and the timeline of repairs and preparation for re-letting. 

When tenants claim you didn’t mitigate, this documentation proves you acted reasonably.

Dealing with commercial tenant breaches or unpaid rent? Our civil litigation lawyers help landlords recover damages, enforce lease terms, and pursue judgment against tenants and guarantors. Contact us at 416.901.9984 or info@pintoshekib.ca to discuss your situation and enforcement options.