Dental Clinic Lease Review in Ontario: What To Watch For
- Jun 19
- 7 min read

Signing a lease for your dental clinic may feel like a routine part of opening or growing your practice. In reality, it is one of the most consequential legal commitments you will make as a business owner. A dental clinic is tied to its physical location in a way that most businesses are not. Your equipment is fixed, your patients expect to find you in the same place, and relocating mid-practice can be disruptive and expensive.
A lease that is not carefully reviewed before you sign can cause serious problems down the road, whether you are trying to renew, sell your practice, bring in an associate, or simply keep your clinic running on your own terms. This article walks through the key issues that come up in dental clinic leases in Ontario and why each one deserves close attention.
Permitted Use
The permitted use clause tells you what you are legally allowed to do in the space. In a dental clinic lease, this should be drafted to cover the full scope of your practice, including general dentistry, any specialty services you offer, and potentially services you might add in the future.
A clause that is too narrow can restrict your ability to expand your practice or bring in a specialist. If your lease says the space can only be used as a general dental office, for example, you may run into problems if you later want to offer orthodontic or oral surgery services. It is worth reviewing this clause carefully and, if needed, negotiating broader language before you sign.
Renewal Rights
Dental clinics invest heavily in leasehold improvements, equipment installation, and building a patient base in a particular location. Losing your space at the end of a lease term can be devastating. This makes your renewal rights one of the most important parts of any dental clinic lease.
A renewal option gives you the right to extend your lease for an additional term, typically at a rent to be determined at the time of renewal or based on a formula set out in the lease. You should understand how much notice you need to give to exercise the option, how rent will be calculated on renewal, and whether the renewal rights are personal to you or whether they transfer if you sell the practice. In some cases, a failure to provide notice within the required window can mean losing the right to renew entirely, so these deadlines matter.
Assignment and Subletting
At some point you may want to sell your practice, bring in a partner, or have someone else operate the clinic under your lease. Whether you can do any of these things depends on the assignment and subletting provisions in your lease.
Most commercial leases require landlord consent before a tenant can assign the lease or sublet the space. What is important for dental clinics is how that consent process works. A landlord may have the right to withhold consent on broad grounds, or the lease may say consent cannot be unreasonably withheld. The standard that applies can make a significant difference when you are trying to sell your practice and need to get the lease transferred to the buyer on a reasonable timeline. If the landlord's consent rights are too broad, a sale can be delayed or derailed. This is worth negotiating at the outset.
Landlord Consent and Control
Beyond assignment, dental clinic leases often require landlord consent for a range of other things, including renovations, signage changes, and even certain changes to your business operations. Understanding exactly what requires consent, and what happens if you proceed without it, is important for the day-to-day functioning of your clinic.
You should also pay attention to any provisions that give the landlord broad discretion to approve or deny requests. Depending on the facts, a landlord with unchecked control over key decisions can create friction when you need to make changes to keep your practice running effectively.
Demolition and Relocation Clauses
Some commercial leases, particularly in mixed-use or older buildings, include provisions that allow the landlord to terminate your lease or require you to relocate if they decide to demolish or redevelop the property. These clauses can be particularly problematic for dental clinics given the costs involved in moving equipment and the disruption to patient care.
You should look for any demolition, redevelopment, or relocation clauses in your lease and understand what protections, if any, you have. In some cases you may be able to negotiate notice periods, compensation, or other protections. In others, the risk of redevelopment may simply be a factor to consider when deciding whether to sign at all.
Personal Guarantees
Many landlords, especially in cases where the tenant is a professional corporation or newly incorporated entity, will ask the practitioner to personally guarantee the lease. This means that if the corporation defaults on its obligations, the landlord can pursue you personally for the amounts owed.
Personal guarantees are a significant commitment and should not be agreed to without understanding what you are taking on. You may be able to negotiate limits on the guarantee, such as capping the amount, limiting the duration, or negotiating a gradual reduction over the lease term. Whether and how much you can negotiate depends on the specific situation and the landlord, but it is almost always worth raising.
What Happens When You Sell the Practice
Selling a dental practice is different from selling most businesses because so much of the value is tied to the physical location, the patient relationships built there, and the goodwill associated with that space. A lease that does not accommodate a sale smoothly can significantly complicate the transaction.
Key issues include whether the landlord has a right of first refusal if the lease is to be assigned, how long the consent process takes, whether the landlord can impose new conditions or require the incoming dentist to meet certain qualifications, and whether the personal guarantee terminates once the lease is assigned to a qualified buyer. These are all things that are much easier to address when you are first negotiating the lease than when you are in the middle of a sale.
A Few Other Things to Look For
Exclusivity clauses, which may restrict the landlord from leasing other space in the building to a competing dental practice.
Operating hours restrictions that could limit when you can see patients.
Net lease versus gross lease structures, and what additional charges you are responsible for beyond base rent.
What happens to your leasehold improvements at the end of the lease.
A dental clinic lease is a long-term commitment, and the terms you agree to at the beginning can shape your options for years to come. Before you sign, you should have a lawyer review the lease and advise you on the key risks and any provisions that may be worth renegotiating.
FREQUENTLY ASKED QUESTIONS
Q: Do I need a lawyer to review my dental clinic lease, or can I review it myself?
A: You can certainly read through a lease on your own, and it is a good idea to do so. But commercial leases are dense legal documents, and many of the provisions that matter most for a dental clinic, including renewal options, assignment rights, and demolition clauses, can be easy to misread or overlook without legal training. A lawyer who works with commercial leases can identify terms that may create problems down the road and advise you on what may be negotiable. Given the length of a typical dental clinic lease and the cost of the investment involved, a legal review is generally money well spent.
Q: My landlord says the lease is standard. Does that mean I do not need to negotiate?
A: Landlords often describe their leases as standard, and in many cases they are using a form they have used before. But a standard form is not the same as a fair or suitable form for your particular situation. Many lease terms are negotiable, including some that landlords do not raise as negotiating points unless a tenant pushes back. It is worth having a lawyer review the lease and advise you on what adjustments, if any, may be worth seeking. Whether the landlord agrees to changes is a separate question, but you should at least understand what you are agreeing to.
Q: What happens to my lease if I want to retire and sell my dental practice?
A: This depends on the terms of your lease. In most cases, assigning a lease to the buyer of your practice requires landlord consent. The lease may set out conditions for that consent, including requirements about the buyer's professional qualifications or financial standing. Some leases also allow the landlord to recapture the space rather than consent to an assignment, which could significantly affect your ability to complete the sale. Personal guarantees sometimes survive an assignment as well, which is another issue to address. Understanding these terms before you sell is important, and ideally you would have thought through them when you first signed the lease.
Q: Can my landlord raise my rent significantly when my renewal comes up?
A: It depends on how your renewal option is structured. Some leases fix the renewal rent in advance or set out a formula based on an index or an agreed percentage. Others say the renewal rent will be set at fair market rent, which can lead to a significant increase depending on conditions at the time. In some cases the parties are required to negotiate, and if they cannot agree, the rent may be determined by arbitration. Understanding how renewal rent is calculated before you sign your initial lease can help you anticipate and plan for what comes next. You should speak with a lawyer if you are unsure how your specific renewal clause works.
CONTACT
If you are reviewing a dental clinic lease or have questions about your existing lease in Ontario, DevLaws can help. Contact DevLaws today to schedule a consultation.
contact@devlaws.com | +1 437 290 0424 | devlaws.com
DISCLAIMER
This article is provided for general information purposes only and does not constitute legal advice. It is not intended to create a lawyer-client relationship. Laws and regulations can change, and the information here may not reflect the most current developments. Every situation is different, and the information in this article may not apply to your specific circumstances. If you are reviewing a dental clinic lease or have questions about your commercial lease in Ontario, you should consult a qualified lawyer for advice tailored to your situation. DevLaws does not guarantee any particular outcome or result.



