Tenant Remedies When a Landlord Defaults or the Building Changes Hands

Tenant Remedies When a Landlord Defaults or the Building Changes Hands

If a landlord stops maintaining the building, fails to deliver space on time, or the building itself is sold out from under you or put into receivership, your lease doesn't automatically fall apart, but knowing what you can actually do about it, and what you can't, matters before you act.

When a Landlord's Failure Becomes a "Fundamental Breach"

Most leases don't give tenants an express right to walk away just because the landlord is behind on maintenance or slow to deliver possession. In the absence of a written termination right, tenants sometimes look to the common-law doctrine of fundamental breach: the idea that a breach so serious it deprives you of substantially the whole benefit of the lease can justify treating the lease as over.

Courts weigh several factors in deciding whether a breach is genuinely fundamental:

• how much of the landlord's obligations went unperformed, relative to its obligations as a whole;
• how serious the breach was to the tenant;
• how likely the breach was to be repeated;
• how serious the consequences were; and
• how much of the overall obligation was still performed despite the breach.

This is a genuinely high bar, and getting it wrong is expensive. In one widely cited case, a landlord's roughly six-week delay in delivering a partially built-out office was found by a trial court to be a fundamental breach, but an appellate court disagreed, holding that a six-week delay on a three-year lease wasn't serious enough to deprive the tenant of substantially the whole benefit of the deal. Because the tenant had already treated the lease as terminated and walked away, it was found to have wrongfully repudiated the contract itself, and was ordered to pay damages of more than $1 million to the landlord.

By contrast, courts have found fundamental breach where the failure genuinely made the space unusable for its purpose, for example, a landlord's failure to repair a broken heating system that left a medical office unusable through a Canadian winter was held to be a fundamental breach entitling the tenant to terminate.

The lesson: don't self-declare a fundamental breach and walk away based on frustration with a landlord's performance. Get legal advice on whether the specific facts meet the standard before you stop paying rent or vacate, the cost of being wrong falls on the tenant.

Relief From Forfeiture, Understanding the Tenant's Side of This Too

The flip side of tenant remedies is worth understanding, because it shapes how landlords and tenants actually negotiate defaults in practice. Relief from forfeiture is an equitable remedy that lets a tenant who has breached the lease ask a court to reinstate it rather than let the landlord terminate, particularly where the breach is relatively minor, has been or can be quickly fixed, and the consequences of losing the lease (a long-term asset, sunk investment in the space, disrupted employees) are severe relative to any real harm to the landlord.

Alberta courts have applied this doctrine in real disputes, including a case where a landlord was found to be estopped from denying a tenant's lease renewal because the landlord had acquiesced to tenant renovations for years without objecting to them or issuing a formal notice of default. The practical implication for tenants: keep a record of anything a landlord has expressly or implicitly approved over the life of a lease (email approvals, accepted rent after a late payment, tolerated changes to the space), because that history can matter if a dispute over a renewal or a termination ever arises.

If the Landlord Sells the Building or Goes Into Receivership

Ownership of an office building changing hands is common, and on its own it doesn't affect your lease. Your lease is a binding contract that generally survives a sale, the new owner steps into the landlord's obligations along with the rent.

Receivership is a further step: a lender or other secured creditor of the landlord can apply to have a court-appointed receiver take over management of the property, typically because the landlord itself is in financial difficulty (often a mortgage default). A few general points are worth knowing if this happens to a building you occupy:

• Your lease generally continues in force. A receiver's role is to manage and preserve the value of the property, usually including collecting rent under existing leases and keeping tenants in place, not to unilaterally cancel tenant leases.
• You may be directed to redirect rent payments. It's common for a receiver to instruct tenants to pay rent to the receiver rather than the previous landlord going forward. Get this instruction in writing before you change where you send rent.
• Occupied, well-performing tenants are an asset to a receivership, not a liability. A building's value in a court-supervised sale process depends heavily on having a stable, paying tenant base, which generally works in your favour as a compliant tenant.
• Ask for an estoppel certificate if you're asked to sign one, and read it carefully. In a sale or receivership process, tenants are often asked to confirm the key terms of their lease in writing (rent, term, options, any landlord defaults) for the benefit of a purchaser or lender. This is a normal part of the process, but it's also your opportunity to flag, in writing, anything the landlord currently owes you or hasn't performed.

The exact procedural mechanics of a receivership, including how quickly tenants are notified and whether a receiver can disclaim a lease, vary by the specific court order appointing the receiver, so confirm these with legal counsel for any live situation rather than relying on the general pattern above.

Common Mistakes

1. Withholding rent unilaterally in response to a landlord's default. Unless your lease specifically gives you a right of rent abatement or set-off for a landlord's failure to perform, withholding rent on your own initiative can put you in default, even if the landlord genuinely failed to meet its obligations first.

2. Declaring "fundamental breach" and vacating without legal advice. As the case above shows, guessing wrong about whether a breach is fundamental enough to justify walking away can result in the tenant, not the landlord, owing significant damages.

3. Not documenting a landlord's failures in writing as they happen. Whether you're building a case for a future remedy or simply protecting your position in an estoppel certificate down the road, a written record (emails noting the issue, dates, and any promised fix) is worth far more months later than a verbal complaint.

4. Ignoring a receiver's instructions, or continuing to pay the wrong party after being told to redirect rent. Get redirection instructions in writing and confirm them before changing your payment process, this protects you from a dispute over whether rent was properly paid.

Frequently Asked Questions

Can I stop paying rent if my landlord isn't maintaining the building? Not safely, unless your lease gives you an explicit right to abate or set off rent for landlord defaults. Absent that, unilaterally withholding rent risks putting you in default instead.

What does "fundamental breach" mean in a commercial lease? It's a common-law doctrine allowing a tenant to treat a lease as terminated when a landlord's breach is serious enough to deprive the tenant of substantially the whole benefit of the lease, a high bar that courts assess case by case, not a general excuse for dissatisfaction with a landlord.

Does my lease end if the building I'm in is sold? No. A sale of the building doesn't cancel existing leases; the new owner takes on the landlord's obligations, including your lease terms, rent, and any renewal options.

What happens to my lease if my landlord goes into receivership? Generally, your lease continues, and a court-appointed receiver typically manages the property and collects rent in the landlord's place while the receivership proceeds, rather than cancelling existing tenant leases.

Should I sign an estoppel certificate if my landlord's building is being sold? Usually yes, it's a standard part of a sale or financing process, but read it closely and flag, in writing, anything the landlord currently owes you or any unresolved issue before you sign, since the certificate is meant to be relied on by the purchaser or lender.

Next Step

If you're planning ahead for a lease renewal or evaluating a move because of ongoing landlord issues, see our guide to planning an office move, or reach out if you're dealing with a specific landlord default or ownership change right now.

---

This guide reflects general commercial leasing practice and Canadian case law as of September 2026; individual leases and circumstances vary, confirm specifics with legal counsel before acting on any remedy described here.