Educational content only. This post explains general concepts in commercial lease assignment and subletting. Specific lease language varies considerably and should be reviewed with a commercial real estate lawyer experienced in healthcare leases.
The lease clauses governing assignment and subletting are among the most consequential and most commonly overlooked at signing. They determine whether you can exit the lease before its term ends, whether you can sell your practice without lease complications, and whether you can share space with another practitioner if circumstances change.
Most first-time tenants pay limited attention to these clauses. Years later, when life circumstances change — selling the practice, taking on a partner, downsizing, expanding to a different location — the operator discovers what they actually agreed to, sometimes at significant cost.
This post explains the difference between assignment and subletting, what landlords typically include in these clauses, and what to negotiate before signing.
Assignment vs. Subletting
The two terms describe different mechanisms for transferring lease obligations.
Assignment transfers the lease itself. The original tenant exits the lease entirely, and a new tenant takes over the same lease with the same terms, obligations, and remaining duration. Assignment is what typically happens when a practice is sold — the buyer takes over the practice's lease as part of the transaction. The original tenant is typically released from future lease obligations after assignment, though this depends on lease language.
Subletting creates a new tenant relationship within the existing lease. The original tenant remains the primary obligor on the lease but rents out a portion (or all) of the space to a sub-tenant. The original tenant is still on the hook for the master lease — if the sub-tenant fails to pay or breaches the sub-lease, the original tenant remains responsible to the landlord.
The two mechanisms serve different purposes. Assignment is for a clean exit. Subletting is for sharing space or temporarily exiting while preserving long-term flexibility.
Standard Lease Language and What It Means
Most commercial leases include some restriction on the tenant's ability to assign or sublet without landlord consent. The specific language ranges from highly restrictive to relatively permissive.
Highly restrictive. "Tenant may not assign this lease or sublet any portion of the premises without the prior written consent of the Landlord, which consent may be withheld in Landlord's sole discretion." This language gives the landlord essentially unlimited authority to refuse any assignment or sublease, for any reason or no reason. From the tenant's perspective, this is the worst case — you have no practical right to transfer the lease or sublet space.
Standard restrictive. "Tenant may not assign this lease or sublet any portion of the premises without the prior written consent of the Landlord, which consent shall not be unreasonably withheld." The "not to be unreasonably withheld" language is meaningfully better for the tenant. The landlord can still refuse, but only for reasonable reasons. What constitutes "reasonable" is sometimes defined in the lease and sometimes left to interpretation.
Tenant-favourable. Some leases define specific reasonable grounds for refusal — financial qualifications of the proposed assignee, use compatibility, market reasons — and clarify that consent must be granted absent these specific concerns. This level of specificity gives the tenant much more practical right to transfer.
Permitted assignments. Some leases specifically permit certain types of assignments without landlord consent. Common categories include assignments to family members, assignments to a corporation controlled by the original tenant, or assignments in the context of a practice sale that meets defined criteria. These exceptions can be valuable.
Recapture Rights
A particularly consequential clause is the landlord's recapture right.
Recapture allows the landlord to take back the leased space (or a portion of it) when the tenant requests assignment or subletting consent. The mechanics typically work like this: tenant requests consent to sublet space; landlord declines consent and instead recaptures the space, ending the tenant's obligation for that portion of the lease. The landlord then re-leases the space directly to a new tenant, capturing whatever rent appreciation has occurred since the original lease was signed.
From the tenant's perspective, recapture rights effectively neutralize the value of subletting provisions. If you find a sub-tenant willing to pay above your current rent rate, the landlord recaptures the space and benefits from the appreciation rather than you.
Recapture rights vary in scope. Some apply to any sublease request; others only to subleases above a defined threshold (more than 50 percent of the space, for example, or assignments to non-affiliates). Negotiating to limit or eliminate recapture rights is often worthwhile.
Profit-Sharing on Subleases
Even when subletting is permitted, many commercial leases include profit-sharing provisions that capture a portion of any sublet rent that exceeds the master lease rent.
The mechanics: if your master lease is $20 per square foot and you sublet at $25 per square foot, the lease may specify that 50 percent of the $5 differential goes to the landlord. The intent is to ensure the tenant doesn't profit from the lease independently of operating the business in the space.
Profit-sharing percentages vary, commonly in the 50 to 100 percent range of the differential. Profit-sharing language combined with recapture rights makes subletting economically unattractive in many leases.
Why These Clauses Matter More Than They First Appear
The reason assignment and subletting clauses matter is that life circumstances change in ways that aren't predictable at lease signing.
Practice sales. Most healthcare practice owners eventually sell. The lease assignment terms determine whether the lease is an asset or a liability in the sale process. A practice with clean assignment rights is easier to sell at a fair price. A practice with restrictive lease language may face buyer concerns, lower offers, or complicated transaction structures to address the lease issue.
Bringing in partners. If the practice eventually adds an associate who becomes a partner, or if ownership structure changes for any reason, the lease assignment provisions affect how that transition can be handled.
Downsizing. A practice that grew into more space than it currently needs can sometimes downsize by subletting unused space. Restrictive subletting provisions prevent this, leaving the practice paying for unused space.
Owner death or disability. If something happens to the practice owner, the lease assignment provisions affect what the family or estate can do with the practice. A clean assignment right makes the practice transferable. A restrictive assignment right can complicate matters significantly during an already difficult time.
Sharing space with complementary practitioners. Some practices benefit from sharing space with complementary practitioners — a physiotherapist sharing with a chiropractor, a general dentist sharing with an orthodontist who works limited days per week. Subletting rights determine whether this is possible.
What to Negotiate
Several specific items are worth pushing on at the term sheet or lease negotiation stage:
Replace "sole discretion" language with "not to be unreasonably withheld." This is the single most valuable change to typical landlord-favourable language. Most reasonable landlords will accept this language; landlords who insist on "sole discretion" are signaling they want flexibility you may not want them to have.
Define what constitutes a "reasonable" refusal. Specific criteria — financial qualifications of the assignee, use compatibility, no default in current lease — clarify what landlord can and can't refuse on.
Permit specific assignment categories without consent. Common requests include assignments to entities controlled by the original tenant, assignments to family members, assignments in connection with a sale of the practice meeting defined financial criteria.
Limit or eliminate recapture rights. Recapture rights are negotiable. Eliminating them entirely is sometimes possible. Limiting them to large subleases (over 50 percent of space, for example) is more commonly achievable.
Reduce profit-sharing percentages. If profit-sharing on subletting is included, the percentage is typically negotiable. 50 percent is more tenant-favourable than 100 percent.
Address the practice sale scenario specifically. A clause specifically permitting assignment to a buyer of the practice meeting defined criteria (financial qualifications, use compatibility) provides certainty for the eventual sale. This is among the most valuable negotiated changes for healthcare practice tenants.
The Practical Reality
Landlords typically don't want to be unreasonable. Most landlord behaviour around assignment and subletting is rational rather than obstructionist. The reason these clauses matter is that lease language was drafted with landlord-favourable defaults, and those defaults persist into the lease unless specifically renegotiated.
Most reasonable landlords will accept reasonable changes to the standard language at signing. They are much less likely to be flexible later, when the tenant is asking for amendments to an executed lease in response to specific circumstances.
The discipline is to think about future flexibility before signing. The practice you're starting today will sell, change ownership structure, or face changing space needs at some point in the next 5 to 10 years. The assignment and subletting language in your lease determines what's possible when those changes come.
If you're early in deciding whether to lease or buy your clinic space, the Buy vs Lease Calculator compares true occupancy cost between the two paths. Owning the building eliminates assignment and subletting concerns entirely, which is one of several considerations in the comparison.
Compare Buy vs Lease →Disclaimer: Lease provisions and negotiation patterns described are drawn from published commercial real estate sources and represent general patterns. Specific lease terms vary considerably. KlinDeck is not a lawyer, broker, or commercial real estate advisor. Consult a commercial real estate lawyer before signing any commercial lease.