Assignment and Subletting Rights in Commercial Leases

Assignment and Subletting Rights in Commercial Leases

If your business is sold, restructured, downsizes, or needs to exit space early, whether you can hand the lease to someone else comes down almost entirely to one clause: the landlord's consent right over assignment and subletting. Most tenants don't look closely at it until they urgently need to use it, which is the wrong time to discover how it's actually worded.

This is different from the question of whether you should take space as a sublease or a direct headlease, see our guide to sublease vs. headlease for that decision. This guide is about the clause that controls whether you, as a tenant, can get out from under (or transfer) a lease you already hold.

Assignment vs. Subletting, What's Actually Happening

Assignment transfers your entire remaining leasehold interest to a new tenant. The assignee steps into your shoes for the rest of the term. Unless your lease says otherwise, you as the original tenant typically remain liable to the landlord for the lease obligations even after assigning, the landlord's consent to an assignment does not automatically release you unless the lease, or the landlord separately, agrees to that release.

Subletting is different: you remain the tenant of record under the head lease, and you become a landlord to your subtenant under a separate sublease. If the subtenant defaults, that's your problem to manage under the head lease, the landlord's relationship stays with you, not the subtenant, unless the head lease later ends and other arrangements are made.

Both routes almost always require the landlord's prior written consent. A lease that's silent on assignment and subletting doesn't mean you're free to do either, the general common-law position, and standard commercial lease drafting, is the opposite: it's restricted unless the lease expressly permits it.

The Landlord Consent Clause: What to Look For

A handful of specific words in this clause matter enormously:

• "Not to be unreasonably withheld": Many leases qualify the landlord's consent right with language like this, which gives tenants some recourse if a landlord refuses consent arbitrarily. Without it, a landlord's consent can effectively be discretionary.
• Recapture rights: Some leases give the landlord the option, when a tenant asks to assign or sublet, to instead "recapture" the space, terminate the tenant's lease and take the space back, rather than approving the assignment or sublease. This can defeat the purpose of asking for consent in the first place if you were counting on transferring, not surrendering, your space.
• Profit-sharing (bonus rent) clauses: If you're able to sublet or assign at a rent higher than what you're paying, some leases require you to share that upside with the landlord, sometimes 50/50 or in full.
• Response timelines: Whether the lease sets a deadline for the landlord to respond to a consent request, and what happens if they simply don't respond (deemed consent, deemed refusal, or nothing at all).

What Counts as a Reasonable Refusal, and What Doesn't

When a lease qualifies the landlord's consent with "not to be unreasonably withheld," that standard has real content built up through case law, not a vague fairness test each side interprets from scratch.

Grounds that generally hold up:

• Legitimate concerns about the proposed assignee or subtenant's character or financial responsibility, provided the landlord is given a fair opportunity to check references and doesn't drag that process out unreasonably.
• A proposed subtenant who doesn't actually intend to occupy the premises, treated as a valid, independent basis for refusal.
• Practical building-management concerns in the right circumstances: risk of vandalism or damage from a vacant or under-used unit, a meaningful increase in the landlord's insurance costs, or real difficulty leasing adjoining space as a result of the proposed use.

Grounds that generally don't:

• Simply disliking the proposed assignee or subtenant, with nothing more concrete behind it.
• A refusal motivated by the landlord's own interest in getting the space back rather than any legitimate concern about the incoming party. Where a landlord wants to retake possession before the term ends and uses a consent refusal to pressure the tenant into surrendering the lease instead, that refusal is treated as unreasonable on its face.
• Delay used as a substitute for an outright refusal. An unreasonably long delay in responding to a consent request can be treated as functionally the same as withholding it. Check whether your specific lease sets a response deadline; if not, that's worth negotiating for rather than relying on after the fact.

If you believe consent was unreasonably withheld, the remedy is narrower than most tenants expect: you don't get an automatic damages claim or a right to walk away from the lease over it. What you get is the right to proceed with the transaction anyway, or to apply to a court for an order permitting it, with the burden on you to prove the refusal was actually unreasonable.

What Typically Gets Negotiated

• The consent standard: pushing for "not to be unreasonably withheld or delayed" rather than an unqualified consent right.
• Carve-outs for affiliate transfers: an exception allowing assignment or sublease to a related company (a parent, subsidiary, or affiliate under common ownership) without needing separate landlord consent, since these transactions don't change the underlying credit risk to the landlord.
• A carve-out for a sale of the business: similar logic, for a merger, acquisition, or sale of substantially all of the tenant's assets or shares.
• Limits on recapture rights: for example, only allowing recapture if the tenant is trying to sublet the entire premises, not a partial floor, or only after a certain point in the term.
• Release on assignment: negotiating that, once the landlord approves a specific assignee and that assignee is performing, the original tenant is released from further liability rather than remaining on the hook for the life of the term.
• Sharing of profit rent: negotiating the split, or a threshold below which no sharing applies (covering, at minimum, the tenant's own costs of arranging the sublease or assignment).

Common Mistakes

1. Assuming the right to assign or sublet exists by default. It generally doesn't. If the lease is silent or restrictive and you haven't negotiated flexibility, you may need the landlord's discretionary consent for a transaction the landlord has no obligation to approve.

2. Not negotiating an affiliate-transfer carve-out until you actually need one. Corporate restructurings, financings, and reorganizations often require moving a lease between related entities on short notice. Negotiating this exception during the original lease deal, when you have leverage, is far easier than asking for it mid-restructuring, when you don't.

3. Forgetting that a sublease's fate is tied to the head lease. If you sublet space and your own head lease is later terminated, including through your own default, your subtenant's occupancy typically ends too, unless the landlord separately agrees to step into a direct relationship with the subtenant. This is worth disclosing clearly if you're the one subletting space to someone else.

4. Not confirming whether you're released after an assignment. Many tenants assume that once a landlord approves an assignment, their own obligations end. Read the clause: in most standard-form leases, you remain contractually liable for the assignee's performance for the balance of the term unless the lease, or a separate release agreement, says otherwise.

Frequently Asked Questions

Can my landlord refuse to let me sublet my office space? Yes, unless your lease requires that consent not be unreasonably withheld, and even then, "unreasonable" is a legal standard the landlord gets to interpret first, with you having recourse (often through negotiation or, in a dispute, the courts) if you believe the refusal doesn't meet it.

If I assign my lease to another company, am I still on the hook if they don't pay rent? Usually, yes, unless your lease specifically provides for a release of the original tenant upon an approved assignment, or the landlord agrees to release you separately. Check this before assuming an assignment ends your exposure.

What is a recapture right and why does it matter? It lets the landlord take back the space instead of approving your proposed assignment or sublease. If your lease includes an unqualified recapture right, asking for consent to sublet can backfire, you may end up losing the space entirely rather than subletting it.

Does my lease automatically let me sublet to a related company without asking? Only if you negotiated that carve-out. Without it, an affiliate transfer typically still needs the same landlord consent as a transfer to an unrelated third party.

What happens to my sublease if my own lease with the landlord ends? It generally ends too. This is the core risk in any sublease arrangement, see our sublease vs. headlease guide for a fuller breakdown of that risk from the subtenant's perspective.

Next Step

If you're weighing whether to take space as a sublease or negotiate assignment flexibility into a new headlease, see sublease vs. headlease: what business owners should know, or reach out to have a specific assignment or subletting clause reviewed before you sign.

---

This guide reflects general commercial leasing practice as of September 2026; individual leases vary, confirm specifics with legal counsel before signing or relying on any lease provision described here.