Commercial Leases and Subleases: What the Law Says
June 2, 2026
Subleasing commercial leases is governed by strict rules under French law. This is the first question you should ask yourself before subleasing: does your lease allow it? French law establishes a clear principle, subject to exceptions and precautions. Here is an overview—please note that this article is for informational purposes only and does not replace the advice of a legal professional.
Under French law, subletting commercial premises is prohibited unless the lease contains a provision to the contrary or the landlord has given express consent (Article L. 145-31 of the Commercial Code). Before subletting, it is therefore essential to review your lease and, in most cases, obtain the landlord’s written authorization.
Subleasing of commercial leases: prohibited unless authorized
The Commercial Code establishes a basic rule: the total or partial subletting of commercial premises is prohibited, unless the lease permits it or the landlord consents to it. This provision protects the landlord, who has chosen the tenant and intends to retain control over the use of the property.
In practical terms, this means that the absence of any mention in the lease does not constitute permission; in fact, the opposite is true. In the absence of an explicit clause permitting subletting, the prohibition applies, and the landlord’s consent must be sought.
This principle stems from the very nature of a commercial lease: the landlord has agreed to rent the property to a specific business, whose financial stability and operations he has assessed. Forcing a tenant on him that he did not choose would amount to depriving him of a legitimate right to have a say. The law therefore protects this balance, while leaving the parties free to include provisions regarding subletting in the contract.
Reading Your Lease: The Key Clauses
Your lease may contain several types of clauses. Be sure to review them before taking any action:
- Absolute prohibition clause: Subletting is prohibited. Any subletting would require a negotiated amendment to the lease with the landlord.
- Conditional authorization clause: Subletting is permitted, but subject to certain conditions (prior consent, approval of the subtenant, rent cap).
- Approval clause: The landlord must approve the subtenant’s identity before they move in.
- Implied terms of the lease: there are no provisions addressing subletting; the legal prohibition applies, and the landlord’s consent is still required.
The procedure: involving the landlord
When subletting is an option, the law requires the landlord to be involved in the process. In practice, this involves formally notifying the landlord and, in most cases, obtaining their written consent. This step is not merely a formality: it ensures the security of the entire transaction.
It is also provided that, when the sublease rent exceeds the primary rent, the landlord may request a reassessment of the primary lease rent. This point warrants attention when calculating the profitability of a sublease. However, in the context of a service provision, this no longer applies in the sense that the service is not merely the provision of office space (cleaning, internet, furniture, flexibility, etc.), so the amount of income from the sublease may exceed the cost of the prorated rent (see Court of Cassation, Civil Division, Civil Chamber 3, June 27, 2024, 22-22.823 22-24.046).
Practical steps to ensure the process is secure
If you’re planning to sublet in accordance with the rules, here’s what you need to do, step by step:
- Carefully review your entire lease and identify any clauses regarding subletting or making the premises available to others.
- Determine exactly what you want to do (full sublease, partial sublease, or another type of sharing arrangement).
- Notify the landlord of your plans in writing, specifying the identity and business activity of the future tenant.
- Obtain their written consent, or negotiate an amendment to the lease if the contract includes a prohibition clause.
- Formalize the relationship with the tenant through a clear contract that is tailored to the chosen legal structure.
This strictness may seem burdensome, but it pales in comparison to the consequences of an illegal sublease. Each step serves as a safeguard.
Full or partial subletting: an important distinction
Subleasing all of one’s premises and subleasing only a portion of them are not handled quite the same way. Partial subleasing—which applies to most companies with underutilized office space—involves granting use of only a few workstations or a specific area, while continuing to operate the rest of the space. It is still subject to the same authorization requirements, but fits more naturally into a model of sharing rather than transfer. It is also the option that lends itself best to flexible leasing arrangements.
The Risks of Illegal Subletting
Subletting without complying with the terms of the lease is not merely an administrative oversight. Unauthorized subletting may constitute a serious breach of the tenant’s obligations and, as such, justify the termination of the commercial lease—resulting in the loss of the right to the lease and any goodwill associated with it. The risk is therefore disproportionate to the potential gain: compliance is not optional.
Subletting without the required authorization may result in the termination of the commercial lease. Compliance with the terms of the lease and the landlord’s consent are not optional but are essential requirements.
An alternative: not to sublet legally
Faced with these constraints, many companies opt for alternatives to subleasing in the strict sense: service provision, temporary occupancy agreements, or registered office services. These options are governed by different regulations and do not entail the same obligations. We compare them in “Subleasing, Service Provision, and Registered Office Services: What Are the Differences?”
This is another benefit of working with a specialized provider: structuring the relationship under the legal framework that best suits your situation and your lease, rather than taking unnecessary risks by winging it.
Not sure what your lease allows? Coworkea will analyze your situation and suggest the best approach to maximize the value of your office space. Let’s talk.
Frequently Asked Questions
Do I have the right to sublet my commercial space?
Only if your lease permits it or if your landlord gives their consent. The law establishes a general prohibition on subletting unless authorized, as provided for in Article L. 145-31 of the Commercial Code.
What happens if I sublet without permission?
An unauthorized sublease may constitute a serious breach of contract and justify the termination of your commercial lease, resulting in the loss of your right to the lease. It is therefore essential to comply with the established guidelines.
Can my landlord raise my rent if I sublet?
When the rent from the sublease exceeds that of the primary lease, the landlord may request a reassessment of the primary rent, unless the sublease is part of a service package that includes other services such as housekeeping, internet access, coffee, or the provision of furniture. This factor must be taken into account when calculating profitability.
How do I get the landlord's approval?
By formally notifying the landlord of the plan and seeking their written consent, as the landlord is generally required to participate in the sublease agreement. An alternative arrangement may also be considered depending on the situation.