Commercial Lease Disputes in Montreal: A 2026 Landlord's Guide to Resolving Tenant Issues
Updated: Sep 19
Whether you've owned commercial property in Montreal for decades or you're leasing out your first unit, one truth holds up every time: an iron-clad lease drafted at the outset is still the single best way to keep the landlord-tenant relationship smooth. But even the best-screened tenants and best-drafted leases run into friction, eventually a missed rent payment, an unauthorized sublease, a maintenance dispute that escalates into something bigger.
This guide breaks down the most common commercial lease issues Montreal landlords face in 2026, what Quebec law actually says about each one, and the practical steps you can take before a dispute turns into costly litigation. Whether you're actively marketing a commercial property for lease or already managing a full building of tenants, knowing when to bring in a commercial lease attorney rather than trying to resolve things solo can be the difference between a quick fix and a drawn-out court fight.
Commercial Leases Are Not Residential Leases — Here's Why That Matters
This is the single most misunderstood point among Montreal landlords, and it changes everything about how a dispute gets resolved.
Residential rental disputes in Quebec go to the Tribunal administratif du logement (TAL) a specialized, relatively fast, low-cost tribunal. Commercial leases are excluded from the TAL's jurisdiction entirely. If your lease is for retail spac, office space, a warehouse, or any premises used primarily for business purposes, a dispute must instead go through the Court of Québec or the Superior Court of Quebec, depending on the amount claimed.
That distinction matters for landlords because:
The Civil Code of Québec (C.C.Q.), not the residential lease provisions, governs the relationship and commercial leases allow far more contractual flexibility, since few clauses are mandatory by law.
Court proceedings are slower and more formal than a TAL hearing, which is exactly why a well-drafted lease with clear default, remedy, and eviction clauses is so valuable it can let you avoid court entirely in many cases.
Legal fees and timelines are typically higher than residential disputes, making prevention (via a solid lease) far cheaper than litigation.
Because of this added complexity, most experienced Montreal law firms recommend involving a commercial lease attorney at the drafting stage not just after a dispute lands in court.
Tenants Refuse to Pay Rent
Tenants withhold rent for many reasons: cash flow shortages, a dispute over additional rent charges (property taxes, common area maintenance, insurance), or a claimed disturbance of enjoyment. Whatever the trigger, communication is the first move: understand the tenant's situation and try to negotiate before escalating.
Solution 1: Structure Payment Options and Send a Formal Notice
If the issue is genuine cash flow strain, structuring a payment plan is often the most effective way to recover what's owed while keeping the tenant in place. You can also prorate late fees and interest over the remainder of the lease term.
If informal negotiation fails, the next step under Quebec law is a mise en demeure , a formal notice of default giving the tenant a deadline to remedy the situation. If the default continues, landlords can apply to the Court of Québec (for claims up to $85,000) or Superior Court (above that threshold) for a judgment ordering payment, and ultimately for résiliation de bail (termination of the lease) if the clause and circumstances justify it.
Many well-drafted commercial leases also include a de plein droit (automatic) resiliation clause, allowing a landlord to terminate and repossess without first obtaining a court order in cases of serious default. Quebec courts have upheld the validity of these clauses, but they've also cautioned landlords to use them carefully; an eviction later found to be abusive or unfounded can expose the landlord to damages. If enforcement is contested, a bailiff (huissier de justice) is typically required to execute the eviction.
If a non-payment dispute is heading toward the Court of Québec or Superior Court, this is the point where working with a commercial litigation attorney stops being optional. The procedural steps, deadlines, and evidence requirements are strict, and a misstep can delay recovery by months.
Solution 2: Transfer of Lease
If the original tenant wants out but the lease hasn't expired, they can't simply walk away. Under the lease terms, they generally remain responsible for finding a replacement tenant to assume the obligations for the remainder of the term subject to your consent as landlord (see the assignment and subletting section below).
Assignment and Subletting Without Consent
This is one of the fastest-growing sources of commercial lease litigation in Montreal particularly in medical, retail, and multi-tenant office buildings, where a tenant wants to bring in a partner or subtenant to offset costs.
Under the Civil Code of Québec, a tenant may assign the lease or sublet the premises, but must first notify the landlord and obtain consent and that consent cannot be withheld without a serious reason. If a landlord refuses, they must explain the reasons within 15 days of receiving the tenant's notice; failing to respond in time is treated as implied consent.
Montreal courts have shown they take unauthorized subleases seriously even economically reasonable arrangements have been annulled where the tenant skipped the landlord's written consent. To avoid disputes here:
Include a clear assignment/subletting clause specifying the notice period, information the tenant must provide about the proposed subtenant, and your grounds for refusal.
Respond to any subletting or assignment request in writing, and within the timeline your lease specifies.
Never assume silence protects you; an unanswered request can be deemed accepted.
A lawyer for commercial lease matters can review a subletting or assignment request against your existing clause within days, often fast enough to meet the 15-day response window before consent is deemed given by default.
Bad Tenants Slide Through Your Screening Process
A basic credit check and application rarely tell the full story. Here's how to build a screening process that actually filters out problem tenants before they sign.
Solution 1: Conduct a Thorough Background Screening
A proper screening verifies rental history, runs a credit check, confirms proof of business insurance, and includes a direct interview with the prospective tenant or their business representatives.
Solution 2: Speak with Previous Landlords — Not Just Current Ones
When checking references, prioritize a tenant's previous landlord over their current one. A current landlord eager to be rid of a difficult tenant may give a misleadingly positive reference. If only one part of an applicant's background raises concerns, consider a trial period with a larger-than-normal security deposit, or a shorter probationary lease term before committing long-term.
A Tenant Regularly Disrupts Other Tenants in the Building
Even a thorough screening process won't prevent every conflict between tenants sharing a building noise, odours, or parking disputes are common flashpoints in mixed-use and multi-unit commercial properties.
Solution 1: Build a Clause Requiring Tenants to Resolve Disputes Themselves
Include a lease clause requiring tenants to make a genuine effort to resolve disputes among themselves before involving you. Make clear that if you do need to step in, the resolution may not favour every party and that repeated issues can be grounds for eviction under the lease.
Solution 2: Step In When Necessary — and Document Everything
When tenants can't resolve things on their own, mediation may be the only path forward. Make sure your lease includes clear property rules and regulations, along with specific clauses addressing tenant-to-tenant disputes, so you have documentation to point to if the matter escalates toward litigation.
Who's Responsible for Repairs? Maintenance Disputes Explained
Repair and maintenance responsibility is one of the most frequent sources of disagreement in Montreal commercial leases and one of the easiest to prevent with clear drafting. Who fixes a failing HVAC system? Who pays for damage from water infiltration? Absent a specific clause addressing it, these disputes can spiral into rent-reduction claims or even lease termination requests.
Under the Civil Code, a landlord who fails to meet their maintenance obligations can be required to reduce rent and once the default is fixed, the landlord can reinstate the original rent going forward. To avoid this exposure:
Specify exactly which repairs (structural, HVAC, plumbing, common areas) fall to the landlord versus the tenant.
Require tenants to report issues promptly, in writing, using a standard maintenance request process.
Address broken or damaged fixtures proactively before a tenant has grounds to complain or claim a rent reduction.
If a repair dispute has already escalated to a rent-reduction demand or a threat of lease termination, a commercial lease attorney can assess whether the clause in your lease actually supports the tenant's position; many landlords are surprised to learn it doesn't.
A Building Has a High Tenant Turnover Rate
Repair disputes are one of the most common reasons commercial tenants choose not to renew. Responding to maintenance requests quickly and professionally is one of the most effective ways to retain tenants long-term.
Solution 1: Repair and Upgrade Premises Proactively
Address broken or damaged fixtures before tenants have to raise them. It signals respect for your tenants and pride in the property.
Solution 2: Monitor Competing Properties' Rents and Amenities
Tenants often leave to save money elsewhere. Track what comparable commercial property for lease listings in your area are offering, and if you see rents softening in the market, consider adjusting proactively rather than losing a tenant to a competitor.
Solution 3: Negotiate Renewals Early
Good landlords typically open renewal negotiations three to four months before a lease ends. Depending on market conditions and occupancy, you might offer an incentive for renewal or, if a rent increase is necessary, pair the notice with a clear explanation and a note of appreciation for the tenancy.
Can I Write a Commercial Lease Myself? Is a DIY Lease Legal?
Technically, yes a landlord can draft their own commercial lease, and it will generally be legally binding. But "legal" and "protective" are not the same thing.
Because Quebec's Civil Code imposes very few mandatory clauses on commercial leases, most of the terms that actually protect you default and remedy clauses, assignment/subletting conditions, repair responsibility, automatic termination rights exist only if you draft them in. A DIY lease that misses these often ends up costing far more in legal fees and lost rent than a lawyer's fee would have upfront, and can leave gaps that a tenant's lawyer will find and exploit if a dispute reaches court.
A professionally drafted lease also sends a signal to your tenant: that the relationship is being taken seriously, and that legal counsel will be involved if obligations aren't met.
Not every business lawyer in Montreal handles commercial real estate day-to-day, so when you're comparing Montreal law firms for this kind of work, look specifically for a lawyer in Montreal with a track record in commercial leasing and litigation, not just general corporate or residential experience.
Protect Your Montreal Commercial Property — Talk to a Commercial Lease Attorney
As issues inevitably arise for commercial landlords, taking preemptive legal measures is the most effective way to protect your investment. David Ghavitian Avocat Inc. is a Montreal-based business lawyer and commercial litigation attorney helping landlords and investors navigate every stage of commercial leasing in Quebec from drafting an airtight lease for a commercial property for lease listing, to resolving disputes, to representing you in court when negotiation isn't enough.
Need a lawyer for commercial lease drafting or a dispute right now? Contact David Ghavitian Avocat Inc. a Montreal-based commercial litigation attorney and business lawyer serving landlords across Quebec. Call 514-882-2920 or reach out online for a consultation.
Related Articles:
Frequently Asked Questions
1. Does the TAL (rental tribunal) handle commercial lease disputes in Quebec?
No. The TAL's jurisdiction is limited to residential leases. Commercial lease disputes in Quebec are heard by the Court of Québec or the Superior Court, depending on the amount in dispute.
2. Can a Montreal landlord evict a commercial tenant without going to court?
In some cases, yes if the lease includes a valid automatic (de plein droit) resiliation clause and the default is serious enough. Quebec courts have upheld these clauses but have cautioned landlords that an eviction later found abusive or unjustified can result in damages, so they should be used carefully and with legal guidance.
3. What happens if a commercial tenant sublets without my consent?
An unauthorized sublease or assignment can be challenged in court, and Quebec courts have annulled subleases made without the landlord's written consent even when the arrangement was economically reasonable for both sides.
4. Who is responsible for repairs in a Montreal commercial lease?
It depends entirely on what the lease says. Because few repair obligations are mandatory under the Civil Code for commercial tenancies, landlords and tenants should specify responsibility for structural repairs, HVAC, plumbing, and common areas directly in the lease to avoid disputes.
5. How long does a commercial eviction take in Quebec?
Timelines vary significantly based on whether the lease has an automatic termination clause, whether the tenant contests the proceeding, and whether the matter goes to the Court of Québec or Superior Court. A lease with clear default and remedy provisions is typically the fastest path to resolution.
6. How do I find the right lawyer for a commercial lease in Montreal?
Look for a commercial lease attorney or business lawyer in Montreal who focuses specifically on commercial real estate and litigation, rather than a general practice firm. Ask about their experience with lease drafting, assignment/subletting disputes, and enforcement before the Court of Québec or Superior Court.
Comments