Sap-Ing-Sith vs a 30-Year Lease in Thailand

Ask ten people in Thailand what a Sap-Ing-Sith is and you get ten answers. Most are a version of "it is like a lease". Some say superficies. A few say it comes with its own title deed. The word itself is spelled a dozen ways in English.

The law is short and clear. Sap-Ing-Sith was created by one Act of seventeen sections, dated 26 April B.E. 2562 and in force one hundred and eighty days after it was published.

Why it matters fits in two sentences. A lease is a contract. A Sap-Ing-Sith is property.

What exactly is a Sap-Ing-Sith?

A registered right to use a property for up to thirty years, which the law treats as property in its own right. You can sell it, mortgage it and leave it to your heirs.

Its own Act defines it as property based on the right to use immovable property [Sap-Ing-Sith Act B.E. 2562, section 3]. It only works on three kinds of property: land held under a chanote, the full title deed, land with the buildings on it where the land is on a chanote, and a condominium unit. Land on any lesser title document is outside the Act.

The term is capped at thirty years, and the Act says nothing about renewal [section 4]. A lease under the Civil and Commercial Code can be renewed for up to thirty more years. A Sap-Ing-Sith has no such clause, so treat "thirty plus thirty" with care when it is said about one.

Two more limits sit in the same section. It covers the whole property on the deed or none of it. And where the property is already mortgaged or already carries another registered right, the bank or the holder of that right has to consent in writing before a Sap-Ing-Sith is created.

What is the difference between a Sap-Ing-Sith and a 30-year lease?

A lease is a contract between you and the landlord. A Sap-Ing-Sith is a piece of property in your hands, backed by a certificate, that you can sell or mortgage without asking the landowner.

A lease is defined by rent: the landlord lets you use the property for a period and you pay for it [Civil and Commercial Code, section 537]. The right runs between the two people who signed, and that is its weakness. A Sap-Ing-Sith does not start as an agreement at all. The owner goes to the Land Office alone with the deed, the official writes the right onto the deed and issues a certificate. At that moment the owner holds the right, and only then sells or transfers it. The right is created first and dealt with afterwards [Sap-Ing-Sith Act, sections 4 and 5].

Hire of immovable property under the Civil and Commercial Code is in the nature of a contractual right enforceable between the contracting parties, which carries certain limitations on its economic use. It was appropriate to provide for Sap-Ing-Sith as a right to use immovable property which can be transferred and given as security for the payment of debt by mortgage.
Explanatory note to the Sap-Ing-Sith Act B.E. 2562, translated from the Thai

That is Parliament describing the gap in its own words. One other law sometimes gets mentioned here, the Hire of Immovable Property for Commerce and Industry Act, which allows leases of thirty to fifty years. It applies to commercial and industrial property only, so it does not help with a villa.

A thirty-year lease and a Sap-Ing-Sith, side by side
Question	30-year lease	Sap-Ing-Sith
What kind of right is it?	A contract. The landlord lets you use the property for a period and you pay rent [s.537].	Property, based on the right to use the land, created under its own Act [s.3].
Maximum term	Thirty years. A longer term is cut to thirty. Renewable for up to thirty more from the renewal [s.540].	Thirty years [s.4]. The Act has no renewal clause.
What can it cover?	Any immovable property.	Chanote land, chanote land with buildings, or a condominium unit. Never part of a plot [ss.3, 4].
How is it recorded?	Over three years it must be written and registered, or it holds for three years only [s.538].	Written on the title deed by the Land Office, with a certificate issued in two copies [ss.4, 5].
Can I sell it?	Only if the contract allows it [s.544].	Yes. The sale is registered and the office tells the owner [s.12].
Mortgage and inheritance	Nothing in the Code. Only a commercial or industrial lease under the 2542 Act can be mortgaged and passes to heirs [that Act, ss.6, 7].	Yes to both [s.12].
What the owner can still do	Sell the land. The buyer becomes your landlord on the same terms [s.569].	Sell or mortgage the land, but not create any other right over it without your written consent [s.9].

Section numbers in the middle column are the Civil and Commercial Code unless another Act is named. Section numbers in the right-hand column are the Sap-Ing-Sith Act B.E. 2562.

Can a Sap-Ing-Sith be sold without the landowner's consent?

Yes. The sale is registered at the Land Office, and the office tells the owner afterwards. Under a lease you need the contract's permission first.

Under the Act a Sap-Ing-Sith can be transferred, mortgaged and inherited, and none of those steps depends on the owner's agreement. What the Act does require is form. Every deal about it must be written and registered at the Land Office, and once it is registered the official writes to the owner promptly [Sap-Ing-Sith Act, section 12]. Notice to the owner, not consent from the owner. A tenant under a lease is in the opposite position: no subletting and no transfer unless the contract allows it, and a tenant who does it anyway can be thrown out [Civil and Commercial Code, section 544].

Does a Sap-Ing-Sith come with its own title deed?

It comes with its own certificate. That is evidence of your right, and it is not a title deed to the land.

The Land Office writes the Sap-Ing-Sith onto the chanote or the condominium certificate and issues a Sap-Ing-Sith certificate in two copies, one for the owner and one kept at the office [section 5]. A lost or damaged certificate can be replaced, and the old one is then cancelled. So the same fact sits in two places, and one of them is the land title itself. The plot is frozen as well: a Sap-Ing-Sith cannot be divided, and land carrying one cannot be split into smaller plots or merged with another [section 8].

Can the landowner still sell or mortgage the land?

Yes to both. What the owner cannot do is create any other right over the land without your written consent.

Once a Sap-Ing-Sith exists, a new superficies, usufruct or similar right over the same land needs your signature. The owner's right to sell the land, or to mortgage it, is untouched [section 9].

Nothing in the Act says what happens to you when the land is sold. For a lease the Code says in terms that the buyer of the land steps into the seller's shoes as your landlord. The Sap-Ing-Sith Act has no sentence like that. What it does instead is put your right on the title deed itself, where any buyer sees it, and it protects anyone who bought a Sap-Ing-Sith for value, in good faith and registered it, against the deal being unwound later or against the owner cancelling the right early [sections 13 and 14].

Does it give me ownership of the land, or of the house on it?

Neither. You get the use of the property, with an owner's rights and duties while it lasts, and any house you build goes to the landowner at the end unless you agreed otherwise.

While the right runs you use the property as the certificate describes, and you still have to follow whatever other law governs that use. Holding a Sap-Ing-Sith does not by itself license a use that another statute regulates [section 10]. Within that, you have the rights, duties and liabilities of an owner, with two exceptions that stay with the real owner: the right to recover the property from a trespasser and the right to stop unlawful interference. If either comes up, you tell the owner at once [section 11].

Buildings are the trap. Any building you alter, extend or put up becomes the landowner's when the Sap-Ing-Sith ends, unless the two of you agreed otherwise [section 11]. The rule does not apply to work done inside a condominium unit. At the end you hand the property back in the condition it is then in, again unless you agreed otherwise [section 15]. The default sends the house to the landowner. Anything else has to be written down at the start.

Ownership of the land is a different law altogether. A foreigner is allowed to own land only under a treaty and within the limits the Land Code sets [Land Code B.E. 2497, section 86].

Is a Sap-Ing-Sith the same thing as a superficies?

No. A superficies makes you the owner of the building. A Sap-Ing-Sith gives you the use of the property and hands the building to the landowner at the end.

On the one point that matters most they are opposites. A superficies is a right to own the buildings on someone else's land [Civil and Commercial Code, section 1410], and when it ends you take the building away or the owner buys it from you at market value [section 1416]. Under a Sap-Ing-Sith the building goes to the owner unless you agreed otherwise.

Sap-Ing-Sith: Property based on the right to use land. Works on chanote land, chanote land with buildings, or a condominium unit. Up to thirty years. Can be sold, mortgaged and inherited, and every dealing is registered.
Superficies: The right to own the buildings on someone else's land. Can be sold and inherited unless the deed creating it says otherwise. Where a term is fixed, thirty years at most.
Usufruct: The right to possess, use and take the income from someone else's property, for a term or for life. It ends when the holder dies.
Habitation: The right to live in a building without paying rent. Cannot be sold or inherited.

Four rights, one piece of land. They are not substitutes for one another, and the choice between them is set out in how a foreigner holds a villa on Thai land.

What this means in practice

The Act is short and leaves the detail to ministerial regulations: how to apply, how the certificate is issued and replaced, how a Sap-Ing-Sith is cancelled, and which deals can be registered against it. Fees work the same way. They are set by regulation within a schedule attached to the Act, the Land Department keeps five per cent of what it collects and the rest goes to the local authority [section 16]. The Act itself sets no percentage of the price.

Everything above is statute. How a provincial Land Office handles a Sap-Ing-Sith is office practice, and practice is not uniform. Offices differ on what they will accept, on how long a file takes, and in some places on whether they register a Sap-Ing-Sith at all. Registrations remain few. Where one is on the table, the points to check are ordinary ones: which title deed the right sits on, what is already registered against it, what the certificate says about permitted use, and what has been agreed in writing about the buildings at the end of the term.

Four different rights can sit over the same piece of Thai land, and each one decides something different about what happens in year thirty. If you are being offered one of them, it is worth knowing which.

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Sources Show all 16 sourcesHide sources

Every statement in this article rests on one of the 16 provisions below, each named by Act and section so it can be checked against the legislation itself.

Sap-Ing-Sith Act B.E. 2562, sections 2 and 3. Commencement one hundred and eighty days after publication in the Government Gazette. Definitions of Sap-Ing-Sith and of immovable property (land with a chanote, land with the buildings on it, condominium units).
Sap-Ing-Sith Act B.E. 2562, section 4. Application by the owner; term not exceeding thirty years; no creation over part only of the titled property; written consent of an existing mortgagee, security holder or registered right holder.
Sap-Ing-Sith Act B.E. 2562, sections 5, 7 and 8. Registration on the title document and issue of the certificate in duplicate; substitute certificate; the right is indivisible and the land cannot be subdivided or merged.
Sap-Ing-Sith Act B.E. 2562, section 9. The owner may not create any real right without the holder's written consent, but may still transfer ownership or give the property as security.
Sap-Ing-Sith Act B.E. 2562, sections 10 and 11. The holder's right of use, subject to the law governing that use; rights, duties and liabilities as if owner, with two exceptions reserved to the owner; buildings the holder alters, extends or newly constructs pass to the owner when the right ends unless agreed otherwise; that paragraph does not apply to condominium units.
Sap-Ing-Sith Act B.E. 2562, section 12. Transferable; may be mortgaged under the Civil and Commercial Code; passes by inheritance; every juristic act in writing and registered, with written notice to the owner.
Sap-Ing-Sith Act B.E. 2562, sections 13, 14 and 15. Protection of a third person acting for value and in good faith who registered in good faith; early cancellation by the owner who is the holder; return of the property in its condition at the time.
Sap-Ing-Sith Act B.E. 2562, sections 6, 16 and 17. Ministerial regulations for application, registration, cancellation and revocation; fees capped by the schedule annexed to the Act, five per cent retained by the Land Department and the balance to local government; the Minister of the Interior is in charge.
Civil and Commercial Code, sections 537, 538, 540 and 544. Definition of hire; writing and registration for a hire over three years; thirty-year maximum and renewal; no sublet or transfer unless the contract of hire provides otherwise.
Civil and Commercial Code, section 569. A hire of immovable property is not extinguished by transfer of ownership, and the transferee takes the transferor's rights and duties towards the hirer.
Civil and Commercial Code, sections 1298 and 1299. Real rights may be created only by virtue of the Code or other laws; acquisition of a real right in immovable property is not complete unless in writing and registered.
Civil and Commercial Code, sections 1410, 1411, 1412 and 1416, applying section 1403 paragraph 3. Superficies as the right to own buildings, structures or plantations on another's land; transferable and inheritable unless otherwise provided; thirty-year cap where a period is fixed; removal of the buildings at the end, or purchase by the landowner at market value.
Civil and Commercial Code, sections 1402 and 1404. A right of habitation entitles the grantee to occupy the building as a dwelling place without paying rent, and it is not transferable, even by way of inheritance.
Civil and Commercial Code, sections 1417, 1418 and 1422. Usufruct as possession, use and enjoyment with the right of management; period or life of the usufructuary; transfer of the exercise of the right unless otherwise provided.
Hire of Immovable Property for Commerce and Industry Act B.E. 2542, sections 3, 4, 6 and 7. Hire for commerce or industry over thirty and up to fifty years; writing and registration or void; the right of hire may be mortgaged; it devolves on heirs and may be sublet or transferred unless the contract provides otherwise.
Land Code B.E. 2497, section 86. Aliens may acquire land by virtue of the provisions of a treaty giving the right to own immovable properties, subject to the Code.

Section numbers are given so you can check every statement in this article against the legislation itself. Where a provision exists only in Thai, the section number and the name of the Act are stated so the Thai text can be located. The Sap-Ing-Sith Act B.E. 2562 is published in the Government Gazette, volume 136, part 56 ก.

Common questions

How long can a Sap-Ing-Sith last?

Thirty years at most. The Act contains no renewal clause. A lease under the Civil and Commercial Code can be renewed for up to thirty more years from the date of renewal, but nothing in the Sap-Ing-Sith Act says the same.

Does the landowner have to consent before a Sap-Ing-Sith is sold?

No. A Sap-Ing-Sith can be sold, mortgaged and inherited without the owner's consent. The deal has to be written and registered at the Land Office, and the office then tells the owner. A lease is the reverse: no transfer unless the contract allows it.

Can a Sap-Ing-Sith be created over part of a plot?

No. It covers the whole property on the title deed or none of it, and land carrying one cannot be split into smaller plots or merged with another while it lasts.

Who owns a house built during a Sap-Ing-Sith?

The landowner, once the Sap-Ing-Sith ends, unless the owner and the holder agreed otherwise. Any building the holder alters, extends or puts up passes to the owner at the end, and the property goes back in the condition it is then in. That rule does not apply to work done inside a condominium unit.

Can a foreigner hold a Sap-Ing-Sith?

The Act sets no nationality test for the holder, and the land stays in the owner's name throughout, so a foreigner holding one is not acquiring land. Whether a particular Land Office will register one, and in whose name, is office practice and is checked at that office.

Does a Sap-Ing-Sith give a foreigner ownership of the land?

No. It is a right to use the property, not ownership of it. A foreigner is allowed to own land in Thailand only under a treaty and within the limits the Land Code sets.

This article is general information about Thai law, not legal advice, and reading it does not create a lawyer-client relationship. It reflects the legislation as reviewed on 2 September 2026. Thai law and administrative practice change, and practice varies between offices and provinces. For advice on a particular situation, get in touch. See our editorial standards and disclaimer.

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