Subleasing and Assignment of Lease Rights in Thailand

Why This Matters from the Outset

Long-term leasehold is one of the most common ways for foreigners to obtain control over real estate in Thailand, particularly land and villas that cannot be held under direct ownership. Under Thai law, however, a lease is first and foremost a personal contractual right of the tenant, with only limited characteristics of a real right. The key practical consequence follows directly from that: a tenant has no default right to sublease the property to a third party or to assign the agreement itself to another person, unless that right is expressly stated in the contract.

This rule is established in Section 544 of the Civil and Commercial Code (CCC): a tenant may not sublease the leased property or assign the tenant's rights to a third party without the landlord's consent. That consent is expressed through a corresponding clause in the agreement. No clause means no right, and any attempt to transfer the property becomes grounds for the owner to terminate the lease.

Two Different Mechanisms: Do Not Confuse Them

Although 'sublease' and 'assignment' are often used interchangeably in everyday speech, they are two legally distinct actions with different consequences.

A sublease (sub-lease, sub-rent) - the tenant remains a party to the head lease and continues to be liable to the owner. The tenant enters into a separate agreement with the subtenant, effectively introducing an additional tier of relations. The original lease remains unchanged.

An assignment (transfer) - the new tenant steps fully into the position of the former tenant. The original tenant exits the relationship, and the obligations leave with them. The incoming party takes on the lease under the same terms as originally agreed.

Comparison: Sublease vs. Assignment

Written Form and Registration

A sublease can technically exist without a written document, but in practice it is almost impossible to prove its terms without one, so a written agreement is still necessary.

An assignment, however, strictly requires written form under Section 306 CCC and, where a registered long-term lease is involved, must be completed at the local Land Office. The owner is not merely required to 'raise no objection' - the owner must actively cooperate: sign a tripartite agreement and appear at the registration. Without the owner's participation the assignment cannot be registered, which is why the owner's corresponding obligation should be recorded in the contract from the outset.

A Subtle Point: What Counts as a Sublease and What Does Not

Thai case law draws an important distinction. If a tenant leases land and then, without permission, subleases that same land, this constitutes a sublease and a breach of Section 544. However, if the tenant builds a house on the leased land and leases out the house, that is not treated as a sublease of the land, provided the agreement does not expressly prohibit allowing third parties to use the land. If the agreement does contain a prohibition against 'permitting other persons to use the plot', then even leasing out the house in the same situation will be treated as a violation.

The conclusion is straightforward: what matters is the precise wording of the prohibitions and permissions in the contract, not general notions of 'fairness'.

What Happens on the Death of a Tenant

Because a lease is a personal right, as a general rule it terminates on the death of the tenant and does not pass to heirs. The agreement ends, and so does the obligation to pay rent. This is a common and painful mistake: a family expects to 'inherit a 30-year villa', but legally there is nothing to inherit.

For rights to pass to the heirs, the contract must contain a separately and expressly drafted clause on succession of the lease (a succession clause). Without such a clause, the owner is entitled to treat the lease as terminated.

A Note on Selling Leasehold

If a foreigner takes a long-term lease with the intention of later reselling it at a profit, that objective and the right of assignment must be recorded in the contract with the owner's consent. It is important to have a clear-headed understanding of the nature of the asset: the tenant does not own the property and holds no title. A leasehold of up to 30 years without a genuinely registered right of renewal is a depreciating asset: every year the remaining term decreases, and with it the market value of any assignment.

The situation differs for condominium units: a foreigner may acquire foreign quota freehold within 49% of the total floor area of a building under the Condominium Act, in which case the arrangement constitutes full ownership rather than a lease. Payment for such a unit must be remitted through a bank with a FET form (Tor.Tor.3) confirming the inward transfer of foreign currency - this will be needed when selling the unit and repatriating funds.

What to Check and What to Watch For

• Whether the agreement contains a clause granting the right to sublease and/or assign. Without it, Section 544 prohibits both operations.
• Whether sublease and assignment are clearly distinguished and the conditions of each are described.
• The owner's obligation to cooperate with registration of the assignment at the Land Office (for a registered lease).
• Written form for any assignment - verbal arrangements carry no legal weight under Section 306 CCC.
• The presence of a succession clause - without one, the agreement will terminate on the tenant's death.
• Express prohibitions in the text against use of the property by third parties - these can turn even a seemingly 'harmless' house rental into a breach.
• The remaining term and the existence and registration of any renewal right - these determine the real value of what is being assigned.