Editorial
Due Diligence Checklist: Buying Thai Property in 2026
By THAI.ESTATE Editorial Team15 min read
Foreign buyers who skip due diligence in Thailand lose money in predictable, documented ways: they buy units on land with encumbrances, pay into off-plan projects that never complete, or transfer funds without the correct Foreign Exchange Transaction (FET) form and find they cannot register ownership or repatriate proceeds later. This guide gives you a concrete, step-by-step due diligence checklist for buying Thai property in 2026, structured by transaction phase so you can use it as a working document alongside your lawyer.
Due diligence in Thailand covers four parallel tracks: title verification, developer or seller verification, regulatory and permit verification, and financial structuring. Each track has hard stop-points - findings that should make you walk away or renegotiate before signing anything.
Quick answer
- Title deed type matters above all else. Only a Chanote (Nor Sor 4 Jor) gives GPS-surveyed, individually registered freehold title. Nor Sor 3 Gor and lower grades carry meaningful boundary and ownership risk.
- Foreign condo quota: A condominium building can sell a maximum of 49% of total unit floor area to non-Thai nationals under the Condominium Act B.E. 2522. Confirm the remaining foreign quota in writing before signing.
- FET form is mandatory for condo registration. Funds must arrive in Thailand from abroad in foreign currency. Your Thai bank issues the FET form (formerly called a Thor Tor 3 form). A wrong transfer reference is one of the most expensive routine errors in Thai property transactions.
- Off-plan buyer protection is contractual, not statutory. There are no escrow accounts for foreign property buyers in Thailand in the traditional sense. Your protection comes from construction-linked payment schedules, contractual penalty clauses, and verified developer credentials - not from a government guarantee fund.
- Land Office registration fees and transfer tax are indicative at around 2-3% of assessed or contract value (as of 2026, subject to government revision). Budget separately.
- A power of attorney (POA) notarised and apostilled in your home country allows a lawyer in Thailand to register the transfer at the Land Office without you being present.
- Timeline from reservation to key handover: ready-built condos typically 6-10 weeks; off-plan projects 2-5 years with interim payment milestones.
Options and scenarios
Scenario 1: Buying a completed condo freehold
This is the most straightforward path for a foreign individual. You can hold the unit in your own name under the Condominium Act, provided the 49% foreign quota is not exhausted. Due diligence focuses on title, quota status, developer solvency (for buildings still under a juristic person managed by the developer), and building permits.
Step 1 - Reservation Pay a reservation deposit (market range: THB 50,000-200,000, indicative). This is usually non-refundable if you withdraw without cause. Get the reservation agreement in English and Thai. It should state the unit number, floor area (usable vs. gross), price, and the deadline for signing the Sale and Purchase Agreement (SPA).
Step 2 - Title deed check Obtain a certified copy of the Chanote (title deed) from the seller. Your lawyer checks the title at the provincial Land Office, not just from the copy the seller provides. Checks cover: current registered owner, mortgage or lien (hypothec) entries, lease registrations, and any court orders or seizure notes on the reverse of the deed.
Step 3 - Foreign quota confirmation Request a written quota certificate or juristic person letter from the condominium juristic person (the legal management body of the building). This confirms the percentage of foreign-owned floor area at the date of your inquiry.
Step 4 - Building and common area permits Obtain copies of the construction permit and the building usage permit (Bai Rap Rong - the occupancy certificate). Confirm the building is registered as a condominium under the Condominium Act, not merely as apartments or commercial space. This distinction determines whether you can hold individual freehold title.
Step 5 - Sale and Purchase Agreement review Have your lawyer review the SPA before signing. Key clauses: transfer date, penalty for late transfer by seller, defect liability period (typically 1-5 years for structural defects), what happens if the foreign quota is lost between signing and registration, and governing law.
Step 6 - International transfer and FET form Transfer the purchase price from your overseas bank account in foreign currency (USD, EUR, GBP, etc.) to your Thai bank account or directly to an account nominated in the SPA. The receiving Thai bank will issue a Foreign Exchange Transaction (FET) form - this is the document that proves the money originated from abroad. Keep every FET form permanently. You will need it to register condo ownership at the Land Office and again when you sell and want to repatriate proceeds.
The transfer reference field in your international wire must describe the purpose accurately (for example: 'purchase of condominium unit'). A generic or blank reference can cause the Thai bank to issue a mis-categorised FET form, which the Land Office may reject.
Step 7 - Land Office registration Both buyer and seller (or their authorised POA holders) appear at the provincial Land Office. Staff verify the FET form, check the title deed, collect transfer fees and taxes, and issue a new Chanote in your name. The process at the Land Office typically takes 2-4 hours on the day.
Step 8 - Handover and snagging Conduct a physical inspection before signing the handover document. Check electrical fittings, plumbing, air conditioning, windows, and finishes against the contract specification. A snagging list signed by both parties creates a contractual obligation for the seller to rectify defects.
Scenario 2: Buying off-plan from a developer
Off-plan purchases carry additional risks because the building does not yet exist. Your main protections are: (a) payment schedules tied to construction milestones, (b) penalty clauses for project delays, and (c) your pre-signing verification of the developer's legal standing.
Developer verification checklist (do this before paying any deposit):
- Obtain the developer's company affidavit (DBD certificate) from the Department of Business Development, dated within 3 months. Verify registered capital, directors, and that the company is active.
- Confirm the developer owns or has a long-term lease on the land. Ask for the land title deed and verify it at the Land Office.
- Ask for the Environmental Impact Assessment (EIA) approval if the project has more than 80 units or is near a protected coastal zone. EIA approval is a legal prerequisite; a project marketing without EIA approval is selling against Thai law.
- Ask for the construction permit (Bai Anuyat Kor Sang). No valid permit means the project cannot legally build.
- Research the developer's track record: completed projects, delivery timelines, any published court cases or BOJ (Business Observer Journal) insolvency filings.
Payment schedule structure: A responsible developer will stage payments against verifiable milestones: foundation complete, structure complete at each floor level, shell complete, fit-out complete, transfer. Avoid contracts that demand more than 30-40% of the purchase price before the structure is visibly above ground.
Contractual penalty clauses: The SPA should specify a daily or monthly penalty the developer pays you if they miss the transfer date. Standard market practice in 2026 is around 0.01% of the contract value per day of delay, though this is a market estimate and varies by project. Negotiate for penalties that are meaningful relative to any delay you could realistically suffer.
Scenario 3: Thai company structure for landed property
Foreigners cannot own land (houses, villas, plots) directly under Thai law. Some buyers use a Thai limited company in which they hold shares, with Thai co-shareholders holding the majority (51%+). This structure exists in a legal grey area: the Land Code prohibits using a company as a nominee structure to circumvent foreign land ownership restrictions. Enforcement risk is real.
Alternatives include long-term registered leases (up to 30 years, renewable by contract though not by law), or purchasing through a Thai spouse (who holds land in their own name - this carries relationship risk). This guide does not recommend the company nominee structure; if you are considering it, obtain independent Thai legal counsel who will give you a written opinion.
Comparison table
| Parameter | Completed Condo (Freehold) | Off-Plan Condo | Leasehold (Land or Villa) |
|---|---|---|---|
| Foreign ownership legal basis | Condominium Act B.E. 2522 | Condominium Act B.E. 2522 | Civil and Commercial Code, registered lease |
| Maximum ownership period | Freehold, unlimited | Freehold, unlimited | 30 years (+ contractual renewal options) |
| FET form required | Yes, mandatory for registration | Yes, required at transfer stage | Yes, if repatriation is intended |
| Key due diligence document | Chanote + occupancy permit | EIA approval + construction permit + company affidavit | Lease agreement + land title + lessor's authority |
| Primary buyer risk | Encumbrance on title, quota exhausted | Developer default, project delays | Lessor insolvency, renewal not enforceable in law |
| Typical transfer timeline | 6-10 weeks from offer | 2-5 years from reservation | 4-8 weeks from agreement |
| Indicative transfer costs (buyer share) | ~1-2% of assessed value | ~1-2% at transfer date | Stamp duty ~0.1%, registration fee ~1% |
| Can be done remotely via POA | Yes | Yes (for final registration) | Yes |
Risks and mistakes
Risk 1: Wrong FET form reference
This is the single most common financial error in Thai condo purchases by foreigners. If your international wire transfer arrives with a reference that does not clearly state 'property purchase' or carries a personal transfer code, the Thai bank may categorise the inbound funds incorrectly. The Land Office requires an FET form that confirms foreign-sourced funds for a property purchase. A mis-categorised FET form means you cannot register freehold title - and correcting it requires going back through the originating bank, which can take months and may be impossible if the sending bank has limited documentation practices.
What to do: Before sending any funds, ask your Thai lawyer to provide you with the exact wording for the transfer reference field. Send a test transfer of a small amount first if you are uncertain about your bank's international transfer system.
Risk 2: Unverified title deed
Sellers sometimes present photocopies of title deeds that have been altered or that carry encumbrances (mortgages, seizure orders) not visible on the copy. The only reliable check is a Land Office search conducted by your lawyer in person at the provincial Land Office where the property is registered. This costs a small administrative fee and takes 1-3 working days.
Risk 3: Foreign quota already at 49%
Developers may not disclose that the foreign quota is near or at capacity. If you sign a reservation agreement and pay a deposit, then discover the quota is exhausted at registration, you may lose your deposit or face a long dispute. Always get quota status in writing from the juristic person, not just from the sales agent.
Risk 4: Off-plan project without EIA or construction permit
In several cases documented in Thai court records, projects were marketed and sold without valid EIA approval or construction permits. Buyers paid significant sums. Construction was then halted by authorities. Recovering funds required litigation that lasted years. Check both documents before paying any deposit on an off-plan unit.
Risk 5: Power of attorney that is too broad
A POA allows someone else to act in your name. If the document is not carefully limited to specific acts (sign the SPA for Unit X, register the transfer at the Phuket Land Office), an unscrupulous agent could use it for other transactions. Your POA must be drafted by your own lawyer, not by the developer's representative.
Risk 6: Confusing usable area with gross area
Thai developers often quote gross floor area (including walls, shared corridors, balconies, parking allocation). Usable or net area is typically 15-25% smaller. The Land Office registers the unit based on the area recorded in the condominium's registered floor plan. Verify which area figure is in your SPA and compare it to the registered plan.
Risk 7: Sinking fund and maintenance fee arrears
When buying a resale unit, confirm there are no outstanding sinking fund (a one-time capital reserve fund paid at purchase, used for major building repairs) or annual maintenance fee arrears. The juristic person can issue a debt clearance letter. Without this, arrears become your liability after transfer.
FAQ
What is the FET form and why is it critical for foreign condo buyers?
The Foreign Exchange Transaction (FET) form is a document your Thai bank issues when foreign currency arrives from abroad and is converted to Thai baht. It records the amount, the sending bank, and the stated purpose of the transfer. The Land Office requires the FET form to register condo title in a foreign buyer's name. Without it, you cannot complete the registration. You also need it when you sell the unit and want to send the proceeds back to your home country. Keep every FET form in a permanent file.
Can I buy Thai property remotely without visiting Thailand?
Yes, for the signing and registration stages. You need a power of attorney that is notarised in your home country and apostilled (or legalised at a Thai embassy if your country is not part of the Hague Apostille Convention). Your appointed representative in Thailand can then sign the SPA and register the transfer at the Land Office on your behalf. You should still visit the property in person at some point before or during due diligence, or commission a professional inspection report.
What title deed should I insist on?
Insist on a Chanote (Nor Sor 4 Jor). This is the only title deed in Thailand that is GPS-surveyed and gives individually registered, legally unambiguous freehold title. Lower grades such as Nor Sor 3, Nor Sor 3 Gor, or Por Bor Tor 5 carry boundary uncertainty and offer weaker legal protection. For condominiums, the building itself will be on a Chanote and your individual unit will have a condominium title (Nor Sor 4 Jor issued in the unit number).
How much are the transfer fees and taxes when buying a condo in Thailand?
As of 2026, the main costs at the Land Office are (indicative figures, subject to government revision): a transfer fee of 2% of the Land Office's assessed value (often split 50/50 between buyer and seller by agreement), a specific business tax of 3.3% of assessed or contract value (paid by the seller if they have owned less than 5 years), and a stamp duty of 0.5% (in lieu of specific business tax if the seller qualifies). Withholding tax is paid by the seller. Budget approximately 1-2% of the purchase price as your direct out-of-pocket cost at transfer, but verify the split with your lawyer before signing the SPA.
Is there any government protection if an off-plan developer defaults?
There is no government-backed compensation fund for off-plan buyers in Thailand as of 2026. Your protection is entirely contractual. This makes pre-purchase developer verification critical: check their company affidavit, their land title, their EIA and construction permits, and their delivery record on previous projects. Negotiate payment milestones tied to physical construction progress, and include meaningful penalty clauses for delay in your SPA.
How do I check if the foreign quota is still available?
Contact the condominium juristic person (the legal management entity of the building, usually based in the building manager's office). Request a written quota certificate stating the current percentage of foreign-owned floor area out of the maximum 49% permitted by law. Get this document before signing any agreement or paying any deposit. Quota status can change quickly in popular buildings.
What documents should I receive before signing the Sale and Purchase Agreement?
You should have in hand: a certified copy of the Chanote (or the land title the building sits on), the condominium registration certificate, the occupancy permit (Bai Rap Rong), the quota certificate from the juristic person, the developer's company affidavit (for new builds), and - for off-plan - the EIA approval and construction permit. If any of these documents cannot be produced, delay signing until they are.
Can I use a Thai bank account to send funds, or must they come from abroad?
For the FET form to be valid for condo registration, the funds must arrive from outside Thailand in foreign currency. Sending Thai baht from a Thai account does not produce a valid FET form for this purpose. If you already hold money in Thailand, speak to your lawyer and your Thai bank about whether any restructuring is possible before transfer. In most cases, the money must genuinely originate from an overseas account.
What is a sinking fund and who pays it?
A sinking fund is a one-time capital reserve contribution paid at the time of purchase (and sometimes at resale). It is held by the juristic person to fund major future building repairs - roof replacement, elevator overhaul, facade work. The typical amount is THB 400-700 per square metre of unit area (indicative, varies by project). It is usually paid by the buyer at transfer. Confirm the exact amount in the SPA or the building's regulations.
Do I need a Thai lawyer, and how do I find one?
You need independent legal counsel - a lawyer who is instructed by you and paid by you, not by the developer or the agent. Your lawyer should have demonstrated experience in Thai property transactions for foreigners, be able to communicate with you in your language or in clear English, and be able to conduct a Land Office title search. Ask for a written engagement letter stating their fee and scope of work before you pay any deposit on the property.
Planning a property purchase in Thailand? Send us your requirements - the THAI.ESTATE team will reply with specific options and a safety checklist for your case.