What you will learn in this article

• The legal difference between a lease and a sublease

• When a sublease is legal and when it is not

• Why the title of the contract is not always decisive

• Risks for tenants and landlords

The legal difference between a lease and a sublease

• Lease agreement – is a contract between the property owner (landlord) and the tenant, granting the tenant the right to use the property for an agreed purpose.

• Sublease agreement – is a contract between the tenant (not the owner) and a third party (subtenant), allowing the subtenant to use all or part of the leased property.

Under Czech law, subleasing an apartment without the owner’s consent is generally not allowed unless the law or the lease agreement provides otherwise. This is a key distinction: the tenant is not transferring ownership rights, only the right to use the property, and only to the extent permitted by law and their own lease.

When the contract title doesn’t match the content

Courts look at the actual content of the agreement, not just its title. This means that if a document titled “sublease agreement” is actually a lease, the court will treat it as such.

Example from practice – when the “sublease” wasn’t a sublease

One of my clients signed a contract labeled as a “sublease,” but in fact, it was a lease for the entire apartment without the owner’s consent. By law, this agreement was invalid and was assessed according to the rules of a lease. The real problem came when the actual owner found out—he challenged the agreement and demanded immediate vacating of the apartment. While my client eventually kept her right to stay, it took months of legal proceedings and caused her a lot of stress.

Risks for tenants and landlords

For tenants, an invalid sublease can mean losing housing, disputes over payments, and even claims for damages. For landlords, unauthorized subletting can complicate property management and tenant relationships.

Lawyer’s recommendation

If you are considering subleasing, always check whether your lease or the law allows it. If you are a landlord, clearly define the conditions for subleasing in your lease agreement.