Editorial
How to Verify a Thai Developer Before Buying: 2026 Playbook
By THAI.ESTATE Editorial Team13 min read
Vetting a Thai developer before you transfer any money is the single most important step in a Thailand property purchase. The legal framework does not protect off-plan buyers the way it does in Australia, the UK or Singapore. If a developer fails mid-construction, your deposit is likely gone. The checks below are practical, sequenced and designed for someone sitting outside Thailand with no local contacts.
This guide tells you exactly what to verify, where to find the information, and which warning signs justify walking away.
Quick answer
- Check the developer's registered company at the Department of Business Development (DBD) online database before anything else. Confirm share capital, directors and that the company is active, not dissolved
- Confirm the land title class: a chanote (Nor Sor 4 Jor) is the only title that gives full ownership rights. Nor Sor 3 Gor and lower classes carry significant legal risk for buyers
- Verify building permit and EIA status at the local municipality or provincial authority. No permit means no legal right to build, and you have no contract protection if construction stops
- Request a construction financing letter from a Thai commercial bank. If the developer cannot show bank financing, buyer deposits are funding construction - a high-risk model
- Inspect the payment schedule: milestone-linked payments tied to visible construction stages reduce your exposure. Front-loaded schedules (more than 30% before structural work begins) are a measurable red flag
- Run a litigation search at the Civil Court online portal and the Land Department. Developers with active creditor or buyer lawsuits are higher risk, regardless of how finished the showroom looks
- Budget for a licensed Thai lawyer: a full project due-diligence review costs roughly 15,000 to 50,000 THB (indicative 2026 market estimate) and is non-negotiable for purchases above 3 million THB
Options and scenarios
How do I check a Thai developer's track record?
The direct answer: search the company name and registration number in the DBD database (dbd.go.th), then visit completed projects in person or hire a local agent to do so on your behalf.
A developer's track record breaks into three layers.
Layer 1: Corporate existence. Every Thai company must register with the DBD. You can search free of charge. Look for the date of incorporation, registered share capital and the list of directors. A company incorporated last year with paid-up capital of 1 million THB selling 500-million-THB condominiums is a structural mismatch. Reputable developers typically carry registered capital proportional to project scale.
Layer 2: Completed projects. Ask the developer for a list of completed projects with addresses. Cross-check those addresses on Thai land registries and visit review forums. Look for the gap between promised and actual handover dates. A single project delivered 12 months late is a data point. Three projects consistently late is a pattern.
Layer 3: Buyer court records. The Thai Courts online system (courts.in.th) allows basic case searches in Thai. Your lawyer can run a full litigation search. Look for civil cases filed by buyers (breach of contract, failure to transfer title) and creditor cases (unpaid contractors, bank foreclosures on project land). Any active foreclosure action on project land is an absolute stop signal.
What land title do I need to confirm before signing?
Thai land titles exist on a spectrum of legal strength. For a condominium or house purchase, only a chanote (full title deed, Nor Sor 4 Jor) gives you secure, registerable ownership. The document carries a Garuda emblem and a precise GPS boundary.
Nor Sor 3 Gor documents (Confirmed Notification of Possession) are legally occupancy rights, not ownership, and cannot be used as collateral by a Thai bank. If a developer's project land sits on Nor Sor 3 Gor, a Thai bank will not finance individual buyer mortgages on that project - another indirect confirmation of risk.
You or your lawyer can confirm the title at the local Land Office (Samnak Ngan Thi Din). For a small fee, the Land Office will produce an official title search showing encumbrances, mortgages and any seizure orders registered against the land. This search is the most important single document in your due diligence.
How do I verify EIA approval and building permits?
For any condominium project of 80 units or more, or any building over eight storeys, Thai law requires an Environmental Impact Assessment (EIA) approved by the Office of Natural Resources and Environmental Policy and Planning (ONEP). The EIA approval number must appear in the developer's disclosures.
The building permit (Bai Anuyat Kor Sang Arkarn) is issued by the local municipality or city hall. Without a valid permit, construction is illegal and the finished building cannot be registered. Developers sometimes begin selling off-plan before the permit is issued - this is a verifiable red flag. Ask for the permit number and confirm it with the issuing authority directly or through your lawyer.
In practice: if a developer shows you renders, a price list and a contract but cannot produce a permit number, do not sign anything or transfer any funds.
How is the project financed and why does it matter?
Thai developers finance construction in two main ways: bank project financing (a commercial bank lends against the project) or buyer pre-sales cash flow (your deposits fund construction).
Bank-financed projects carry meaningful protection. The bank conducts its own appraisal before lending. The bank monitors construction drawdowns. If the developer defaults, the bank has legal incentive to appoint a new developer or sell the asset to recover its loan - which often means buyers receive their units.
Buyer-funded projects carry substantially higher risk. If sales slow down, construction stops. No Thai law requires a developer to ring-fence your deposit in a separate account. Ask the developer for a letter of intent or facility agreement from a licensed Thai commercial bank showing project-level credit. If none exists, treat the project as high-risk regardless of the marketing.
What payment schedule is safe for an off-plan purchase?
A safe payment structure ties each instalment to a verified construction milestone, not to a calendar date.
Indicative safe structure for a 2026 off-plan condominium:
- 5-10% on reservation (refundable during due diligence period)
- 15-20% on contract signing
- 10-15% at foundation completion (confirmed by site visit or independent surveyor report)
- 10-15% at structure completion
- 10% at fit-out complete
- Remaining balance at title transfer and key handover
Any schedule requiring more than 30% of the total price before structural work begins is an aggressive front-load. If a developer collapses after taking 40% but before pouring concrete, your legal claim is against an insolvent company with no built asset to sell.
Your purchase contract should also specify a delay penalty clause: a fixed daily or monthly penalty (commonly 0.01% to 0.05% of the contract price per day, indicative) if the developer misses the handover date. Without this clause, delays cost you nothing on paper but lose you months of opportunity cost.
What can I verify remotely versus what requires a lawyer on the ground?
Some checks are genuinely accessible online from outside Thailand. Many require a licensed professional present at a Thai government office.
Remote checks you can run yourself: DBD company registration and financial statements, court case search (in Thai, may require translation), project name Google searches in Thai and English, developer social media and completed-project reviews.
Checks that require a Thai lawyer or qualified local representative: official Land Office title search and encumbrance report, building permit number confirmation with the issuing municipality, EIA approval verification with ONEP, review of the actual purchase contract under Thai contract law, and confirmation that the condominium juristic person (the legal entity managing the building after handover) is properly set up.
The cost of skipping on-the-ground due diligence is not the lawyer's fee. It is the full value of your deposit if the project fails.
Comparison table
| Verification check | Can you do it remotely? | Cost estimate (2026, indicative) | Risk if skipped |
|---|---|---|---|
| DBD company search | Yes, free online | 0 THB | Buying from unregistered or dissolved entity |
| Land Office title search | No, requires lawyer | 2,000-5,000 THB | Title may be Nor Sor 3 or encumbered by mortgage |
| Building permit check | Partial (permit number only) | 1,000-3,000 THB via lawyer | Construction may be illegal, unit cannot be registered |
| EIA approval check | Partial (reference number) | Included in legal fee | Building can be ordered demolished if EIA was bypassed |
| Bank financing letter | Request from developer | 0 (developer provides) | Deposit funds construction with no bank safety net |
| Litigation search | Partial (Thai courts portal) | 3,000-8,000 THB via lawyer | Active creditor cases or buyer lawsuits missed |
| Payment schedule review | Yes, review yourself | 0 (self-review) | Front-loaded terms expose 40%+ before concrete is poured |
| Full contract legal review | No, requires licensed lawyer | 10,000-30,000 THB | Penalty clauses absent, title transfer conditions unclear |
Risks and mistakes
Paying a reservation fee before due diligence is complete
In Thailand, a reservation fee (commonly 50,000 to 200,000 THB) is often non-refundable once you sign. Developers use time pressure ('this unit will be gone tomorrow') to push you to pay before you have confirmed title, permits or financing. Pay the reservation only if the contract explicitly states it is refundable during a defined due diligence period of at least 14 days.
Accepting renders and brochures as proof of permits
Marketing material is not legal evidence of anything. A render proves a designer was hired. A brochure proves a printer was paid. The only valid proof of a building permit is the official document number issued by the local authority. Ask for the number and have your lawyer confirm it. If the developer says the permit 'is in process', the project is in pre-permit stage and you should wait.
Trusting a 'government-backed' or 'BOI-approved' label without checking what it means
Board of Investment (BOI) promotion means a company received tax incentives for specific business activities. It does not mean the Thai government endorses the developer's reliability or that your deposit is protected. These labels carry zero legal protection for a property buyer.
Signing a contract in Thai without a certified translation
Thai courts apply the Thai-language version of a contract. If your contract is in English only or has an English translation without the Thai original, enforcement is complicated. If it is in Thai only and you cannot read Thai, you are signing a document you cannot understand. Require a certified bilingual contract and have a Thai lawyer explain each clause.
Ignoring the sinking fund and common area fee structure
The sinking fund is a one-time payment at handover (commonly 400 to 800 THB per square metre, indicative) to cover future major repairs. The common area maintenance fee (CAM fee) is an ongoing monthly charge (commonly 40 to 80 THB per square metre per month, indicative). These are not optional. Confirm the rates in writing before signing. Projects with unrealistically low CAM fees often face maintenance failures within three to five years.
Assuming a Thai company name you recognise is the same legal entity
Developers sometimes operate multiple companies with similar names. 'ABC Phuket Development Co., Ltd.' and 'ABC Property Phuket Co., Ltd.' are legally separate entities. Confirm the exact registered company name and DBD registration number on every document you receive, and confirm it matches the entity selling you the unit.
FAQ
How do I find a Thai developer's company registration number?
Go to dbd.go.th and search the developer's company name in English or Thai. The site returns the registration number, incorporation date, registered capital, company status (active or dissolved) and a list of directors. This search is free. If the company does not appear, do not proceed.
What is a chanote and why does it matter?
A chanote (Nor Sor 4 Jor) is Thailand's highest-grade land title. It is GPS-surveyed, registered with the Land Department and can be legally transferred, mortgaged and inherited. Lower-grade documents such as Nor Sor 3 or Sor Kor 1 carry occupancy or usage rights only, not full ownership. For any residential purchase, insist on a chanote underlying the project land.
Can I verify the building permit from outside Thailand?
You can ask the developer for the permit number and issuing authority. You can also ask your lawyer to call or visit the municipality to confirm the number is valid, active and covers the specific building in question. You cannot verify this yourself online in most Thai provinces as of 2026 - most municipalities do not publish permit registers publicly.
What is the EIA requirement for Thai condominium projects?
Projects of 80 units or more, buildings over eight storeys, or developments in environmentally sensitive zones (coastal areas, national park borders) require EIA approval from ONEP before a building permit can be issued. If a developer is selling a large beachfront project without an approved EIA, the building permit either does not exist or was improperly issued. Either scenario puts the entire project at legal risk.
Is my deposit protected if a Thai developer goes bankrupt?
In most off-plan purchase contracts in Thailand, your deposit is an unsecured creditor claim against the developer's estate. There is no statutory deposit protection fund for property buyers in Thailand as of 2026. Your best protection is a milestone-linked payment schedule (so you have paid as little as possible if failure occurs early), a contractual penalty clause, and verification that the project is bank-financed rather than buyer-funded.
How much does full legal due diligence cost in Thailand?
A full due diligence review - including Land Office title search, permit verification, EIA check, litigation search and contract review - costs between 15,000 and 50,000 THB through a licensed Thai law firm, depending on project complexity and location (indicative 2026 market estimate). This is a fixed cost against a purchase that may be worth millions of baht. It is not optional for any serious buyer.
What is a juristic person in Thai condominium law?
Under the Thai Condominium Act, the juristic person (Niti Bukhon) is the legal entity formed after a condominium building receives its registration. It manages common areas, collects CAM fees and enforces building rules on behalf of unit owners. Before buying, confirm that the developer has a clear plan for establishing the juristic person and that the CAM fee and sinking fund are defined in the contract.
What red flags in a payment schedule should make me walk away?
Three specific triggers: more than 30% of the total price due before structural work begins; no milestone definitions (payments tied to dates rather than construction stages); and no delay penalty clause. If all three are present in a draft contract, the schedule is designed for the developer's cash flow, not your protection.
Can I use a Thai bank mortgage as a due diligence signal?
Yes, indirectly. If a major Thai commercial bank has agreed to offer individual buyer mortgages on a specific project, it means the bank has conducted its own valuation and legal review and found the project acceptable. This does not eliminate your personal due diligence but it is a meaningful positive indicator. Ask the developer which banks have approved the project for mortgage lending.
How long does developer due diligence take for a foreign buyer?
Allow three to four weeks for a thorough review: one to two weeks for the lawyer to run all searches and produce a written report, plus time for you to review the contract, request amendments and confirm your financing. Any developer or agent pushing you to sign within 24 to 72 hours of your first inquiry is using time pressure as a sales technique. Take the time you need.
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.