Exclusivity Clauses in Ontario Commercial Leases

An exclusivity clause is a provision in a commercial lease that restricts the landlord’s ability to lease other space in the same plaza, shopping centre, or building to a business that competes with the tenant. Where it applies, the landlord agrees not to enter into a new lease — and sometimes not to renew an existing one, or consent to an assignment — for a competing use anywhere else in the property for as long as the clause remains in effect.

Unlike a permitted use clause, which restricts what the tenant itself can do with its own space, an exclusivity clause restricts the landlord’s conduct with respect to everyone else in the property. It’s entirely a creature of the negotiated lease — there’s no provision of the Commercial Tenancies Act or any other Ontario statute that grants a tenant exclusivity automatically. For background on how commercial leases work more generally in Ontario, see our guide to commercial lease agreements.

Exclusivity is most often seen in multi-tenant retail properties, where a landlord is actively balancing the interests of several tenants at once. A single landlord granting exclusivity to one tenant is, in effect, also agreeing to a limit on what it can offer every future prospective tenant for that property, which is why exclusivity is typically reserved for tenants the landlord is particularly motivated to attract or retain, rather than offered as a standard feature of every lease in the building.

The practical value of an exclusivity clause depends almost entirely on how carefully “competing business” is defined. A clause that simply bars leasing to “a competitor” is vague and difficult to enforce, since reasonable people can disagree about what actually competes with the tenant’s business. More effective clauses define the restricted use by reference to specific products, services, or categories — for example, barring any other tenant whose primary business involves the retail sale of a defined category of goods, or the provision of a defined type of service.

Precision cuts both ways. A definition that’s too narrow can leave the landlord free to lease to a business that competes in every practical sense but falls just outside the defined category — for example, a clause protecting against another “coffee shop” that doesn’t capture a bakery café that also sells coffee as a significant part of its revenue. A definition that’s too broad, on the other hand, can create disputes with other existing or prospective tenants whose businesses only partially overlap with the protected category. Getting this balance right is usually the single most important part of drafting or reviewing an exclusivity clause.

Many exclusivity clauses also carve out specific exceptions regardless of how the main definition is worded. A landlord might reserve the right to lease to a large anchor tenant even if that anchor’s business technically overlaps with the protected category, or to a tenant that was already in place before the exclusivity clause was signed. Reading these carve-outs as closely as the main definition itself matters, since a broad exception can quietly undo much of the protection the headline clause appears to offer.

Most exclusivity clauses are limited to the specific plaza, centre, or building the tenant is leasing in. In some cases, however, particularly where the landlord owns or controls other nearby properties, a tenant with sufficient leverage may negotiate a broader radius clause — restricting the landlord from leasing a competing use within a defined geographic distance of the tenant’s location, not just within the same property.

Radius clauses are less common than property-limited exclusivity, and landlords are generally far more resistant to them, since they constrain leasing decisions across multiple properties rather than just one. Where a radius clause does exist, it’s important that the distance, the method of measurement, and the properties it applies to are all defined clearly, since a vague radius clause is difficult to enforce in practice.

Landlords are also more likely to resist a radius clause if it could interfere with the sale of a nearby property to a third party, since the clause would effectively follow the land and could reduce its value or marketability to a buyer. For this reason, radius clauses are sometimes limited to properties the landlord directly owns and controls at the time the lease is signed, rather than extending indefinitely to anything the landlord might acquire later.

For a tenant, exclusivity is primarily a protection against direct competition for the same customer base within the same physical property — the exact pool of foot traffic the tenant is paying rent to access. Without it, a landlord is generally free to lease neighbouring space to a near-identical business, which can meaningfully reduce the tenant’s sales even though the tenant’s own lease terms haven’t changed at all.

This matters most for retail and food-service tenants whose business model depends heavily on walk-in traffic within a specific plaza or centre, which is why exclusivity clauses are far more common in those settings than in office or industrial leases. A tenant that has invested significantly in buildout and marketing tied to a specific location has a particular interest in making sure that investment isn’t undercut by a nearly identical business opening two doors down.

What happens if a landlord leases to a competing business anyway depends entirely on the remedy language in the specific lease, since Ontario law doesn’t impose a standard remedy for this kind of breach. Many exclusivity clauses specify a reduction in the tenant’s rent — sometimes to a nominal amount — for as long as the competing use remains open, giving the landlord a direct financial incentive to resolve the breach.

Some clauses go further, giving the tenant a right to terminate the lease if the breach isn’t cured within a defined period, or a right to pursue damages for lost profits caused by the new competing tenant. Because these remedies vary so widely from lease to lease, a tenant relying on an exclusivity clause for real protection generally needs the remedy provisions — not just the exclusivity promise itself — to be clearly and specifically drafted.

It is also worth considering how a breach would actually come to light. A tenant generally needs to notice a new competing business opening nearby and raise the issue with the landlord directly, since a landlord is unlikely to proactively flag its own breach. Some leases address this by requiring the landlord to give advance notice of new leasing deals affecting the property, giving the tenant an earlier opportunity to object before a competing tenant actually opens for business.

Because exclusivity limits a landlord’s future leasing flexibility, it tends to be one of the more heavily resisted terms in a commercial lease negotiation, similar in that respect to co-tenancy clauses. Landlords generally try to narrow the defined scope of “competing business,” limit the clause to the initial lease term rather than renewals, or exclude certain categories of tenant (such as a pre-existing tenant whose use might otherwise overlap) from its reach.

Tenants seeking exclusivity should focus on getting the definition of a competing business right, confirming whether the clause survives into renewal terms, and making sure the remedy for a breach is specific and meaningful rather than vague. As with other negotiated lease terms, it’s worth reviewing the final language against the broader overview at Commercial Leases and, where the stakes justify it, having the clause reviewed before signing — our tools page may also be a useful starting point for related lease considerations.