Thai Developer Verification Checklist: 10 Checks Before You Pay

Vetting a Thai developer before you transfer any money is not optional - it is the single most important step a foreign buyer can take. Thailand has no equivalent of a Western-style consumer protection agency for off-plan property buyers, and there are no escrow arrangements that protect foreign buyers in the classic sense. Your real protection comes from three things: a verified developer track record, a payment schedule tied to measurable construction milestones, and a lawyer who checks the land title before you sign anything.

This guide gives you a step-by-step verification playbook you can start from your home country, with clear instructions on what you can confirm online and what must be done on the ground in Thailand.

Quick answer

• Check the land title first. A valid chanote (NS-4 title deed, the highest class of Thai land ownership) is the minimum acceptable standard. Anything lower - Sor Kor 1, NS-3, or possession certificates - carries legal risk for a project you are buying into.
• Confirm the building permit exists before paying any reservation fee. A developer selling from renders alone, without a building permit, is an unacceptable risk.
• Require an Environmental Impact Assessment (EIA) approval letter for any project above the legal thresholds (condominiums over 80 units or over 4,000 square metres of usable area in most zones).
• Map the developer's completed projects. Require a list of at least two finished, handed-over projects - not just launched ones. Verify them independently.
• Understand construction financing. A project funded primarily from buyer down payments, with no disclosed bank credit line, is a warning sign that construction may stall if sales slow.
• Red-flag payment schedule: Any request for more than 20-30 percent of the purchase price before a building permit is issued should stop the process until you have full legal verification.
• Hire a Thai property lawyer who is independent of the developer and the selling agent. Budget 15,000-40,000 THB (indicative, 2026 market estimate) for due diligence on a single unit.

Options and scenarios

Scenario 1: You are buying from abroad with no local contacts

This is the highest-risk scenario and the most common one for international buyers. You have seen the project online, received a presentation, and a salesperson is asking for a reservation deposit to 'hold the price.'

What you can do remotely:

• Search the Department of Land's online portal (dol.go.th) for the project's land parcel. The portal is available in Thai; you will need a Thai-speaking assistant or lawyer to interpret the results. You are looking to confirm the title class and confirm the registered owner matches the developer's legal entity name.
• Search the Department of Business Development (DBD) portal (dbd.go.th) for the developer's company registration, paid-up capital, and financial filings. A company with very low paid-up capital (under 1 million THB) running a multi-hundred-million THB project is worth questioning.
• Search Thai court records via the Office of the Judiciary portal (coj.go.th) for the developer's company name. Active civil or criminal cases are a hard stop.
• Search property forums and Facebook groups in English for the developer's name. Anecdotal, but patterns of complaints - especially about delayed handovers - are a useful early filter.
• Use Google Street View and satellite imagery to check whether the construction site matches the stage of completion the developer claims.

What requires someone on the ground:

• Physical title inspection at the local Land Office. The chanote number must be physically verified at the Land Office (Samnak Ngan Tee Din) in the province where the project sits. A Thai lawyer can request a title search that shows any mortgages, liens, or encumbrances registered against the land. This is not optional.
• Building permit check at the local municipality. The Tesaban (municipality) or Or Bor Tor (sub-district administrative organisation) holds the building permit file. Your lawyer or a local representative can request sight of the permit number and confirm it covers the building type, height, and footprint the developer is advertising.
• EIA confirmation with the Office of Natural Resources and Environmental Policy and Planning (ONEP). For large projects, ONEP publishes approved EIAs. Your lawyer can cross-reference the project name and location.
• Site visit to verify actual construction progress against the developer's stated timeline.

Scenario 2: You are buying a completed or near-completed unit

Completed units carry lower construction risk. The main concerns shift to:

• Whether the building has received its Condominium Juristic Person registration under the Condominium Act. Without this registration, the building cannot legally issue individual title deeds (chanote for each unit).
• Whether the Foreign Ownership Quota (maximum 49 percent of total unit floor area under foreign freehold) is still available in the building. Request the current ownership ratio in writing.
• Whether there are outstanding common-area debts on the specific unit - unpaid sinking fund contributions (a one-time capital reserve fund) or common-area maintenance fees can legally be passed to a new owner.
• Whether the developer has discharged the construction mortgage on the land. If the bank that financed construction still holds a mortgage over the land or the building, individual unit titles cannot be cleanly transferred until that mortgage is released.

Scenario 3: You are buying in a resort or mixed-use project outside Bangkok

Phuket, Samui, Chiang Mai and similar resort destinations have specific risks:

• Land title quality varies more than in Bangkok. Hillside land, coastal land, and agricultural land near resort areas may carry restricted titles or be subject to Forest Act or National Park Act encumbrances that are not visible from a surface inspection.
• Some resort projects are structured as hotel-pool or leaseback arrangements, not straightforward condominium freehold sales. These require a completely different set of due diligence checks, including review of the hotel operating agreement and the legal basis for the promised return.
• Construction financing is less transparent in resort markets. Ask the developer directly: which Thai commercial bank has issued a construction credit facility for this project? Request the bank's letter of support if available.

Comparison table

Verification check	Can you do it remotely	Requires local lawyer	Cost (indicative, 2026)	What failure to check costs
Land title class (chanote vs lower titles)	Partially (online DOL portal, Thai language)	Yes - full title search at Land Office	Included in lawyer's due diligence fee	Loss of entire purchase price if title is defective or encumbered
Building permit confirmation	No	Yes - lawyer or representative visits municipality	Included in lawyer's due diligence fee	Purchase of an illegal or non-compliant building; impossible to obtain individual title
EIA approval for large projects	Partially (ONEP website has some records)	Yes - for formal confirmation	Included in lawyer's due diligence fee	Project halted by authorities; delays of 2-5 years; possible demolition orders
Developer company registration and financials (DBD)	Yes - dbd.go.th is accessible online	No (but lawyer interpretation is useful)	Free (DBD portal); lawyer review: 2,000-5,000 THB	Contracting with a shell company; no recourse if developer defaults
Litigation and court record search	Partially (coj.go.th, Thai language)	Recommended	Included in lawyer's due diligence fee	Buying into a project already subject to creditor claims or injunctions
Construction mortgage status	No	Yes - Land Office search	Included in lawyer's due diligence fee	Unit title cannot be transferred until mortgage is discharged; delays or loss of investment
Completed-project track record	Partially (site visits via maps, forum research)	Strongly recommended (physical verification)	5,000-15,000 THB for a site-visit report	No basis to assess delivery risk; paying premium price for an unproven developer
Foreign ownership quota availability	No (requires juristic person records)	Yes - request from building juristic person	Included in lawyer's due diligence fee	Cannot register title in your name; money lost or tied up in dispute

Risks and mistakes

Paying a reservation deposit before any checks

A reservation deposit in Thailand is typically 50,000-200,000 THB (indicative range). Developers often present it as refundable, but the refund conditions are in the Thai-language contract you have not yet read. Pay nothing until a lawyer has reviewed the reservation agreement and confirmed the deposit is refundable if due diligence fails.

Accepting a sales presentation as due diligence

A developer's marketing brochure, sales agent presentation, or developer website is not due diligence. These materials may contain render images of a building for which no permit exists. In Thailand, it is legal to market and take reservations on a project before a building permit is issued. The risk sits entirely with you.

Ignoring payment schedule structure

A standard payment schedule for a Thai off-plan condominium looks roughly like this (indicative structure):

• Reservation: 2-5 percent
• Signing of Sale and Purchase Agreement (SPA): 10-20 percent
• Construction milestone payments (foundation, structure, fitting-out): 30-50 percent in stages
• Transfer of title: remaining 15-30 percent

If a developer asks for 50 percent or more before construction has started, treat this as a serious red flag. It suggests the project may be using early buyer payments to fund land acquisition or other costs, not construction. If sales stall, construction stops.

Ignoring the Sale and Purchase Agreement (SPA) delay clause

Thailand's Condominium Act gives some protection on delivery timelines, but your strongest protection is the contractual penalty for delay written into the SPA. A well-drafted SPA includes a daily penalty (typically 0.01-0.10 percent of the purchase price per day of delay) for late handover. If there is no delay penalty clause, or if it is capped at a trivially small amount, you have no practical financial remedy when the project runs late.

Assuming the selling agent has verified the developer

Selling agents in Thailand earn commission from the developer - typically 3-7 percent of the purchase price. Their commercial interest is not aligned with yours. An agent recommending a project is not a substitute for your own independent legal verification.

Buying in a project where land title is not chanote

The chanote (Nor Sor 4 Jor) is Thailand's highest-grade title deed. It is GPS-surveyed, registered at the Land Office, and gives the holder full legal ownership rights. Lower grades - such as Nor Sor 3 Gor (NS-3G), Sor Kor 1, or possession documents - may not be legally upgradeable, may carry boundary disputes, or may sit on land that the state can reclaim. For a condominium purchase, the underlying land must have chanote title. Anything else is unacceptable.

Not checking whether the project requires an EIA

Projects above the legal size thresholds must obtain EIA approval from ONEP before construction begins. If a developer starts construction without EIA approval and the project is later found to require one, authorities can issue a stop-work order. Projects have been halted for years for this reason. Always ask for the EIA approval reference number and verify it with ONEP.

FAQ

How do I check a Thai developer's track record from outside Thailand?

Start with the Department of Business Development portal (dbd.go.th) to confirm the company is registered and has filed recent accounts. Then search by the developer's name on Thai property forums and Facebook groups in English - patterns of delay complaints from existing buyers are a reliable signal. For deeper verification, hire a Thai lawyer to visit completed projects in person and request handover records from the Land Office showing actual transfer dates versus promised dates.

What is a chanote and why does it matter for my purchase?

A chanote (formally Nor Sor 4 Jor) is Thailand's highest-grade land title deed. It is issued after a GPS-precision survey and registered with the Land Department. It gives the holder full, legally protected ownership rights. For a condominium, the underlying land of the building must have chanote title before the developer can register individual unit titles. Without chanote, you cannot receive a clean title deed for your unit.

Do I need a Thai lawyer, or can I rely on the developer's recommended lawyer?

You need an independent lawyer - one you find and pay yourself, with no referral relationship with the developer or selling agent. A developer-recommended lawyer has a conflict of interest. Your lawyer's job is to advise you when a contract or title has a problem, which a developer-aligned lawyer will not do reliably. Budget 15,000-40,000 THB (indicative, 2026) for independent legal due diligence on a single unit purchase.

What is a red-flag payment schedule for a Thai off-plan condo?

A payment schedule becomes a red flag when it asks for a large share of the price before construction milestones are verifiably reached. Specifically: any request for 50 percent or more of the total price before foundations are complete, or any request for payment before a building permit is issued, should pause your process. Your SPA should link each payment to a physical, inspectable construction milestone - not to a calendar date.

Can I verify the building permit online?

Not fully. Building permit records are held by the local municipality (Tesaban) or sub-district body (Or Bor Tor) where the project is located. Some municipalities have partial online records, but most require a physical request. Your Thai lawyer or a local representative can visit the relevant office and request sight of the permit. Ask for the permit number, the approved building height and footprint, and the date of issue.

What happens if the developer goes bankrupt mid-construction?

If the developer becomes insolvent, buyers typically become unsecured creditors. If the land carries a construction mortgage from a bank, the bank's claim on the land takes priority over buyer claims. This is why verifying construction financing matters: a project with a reputable commercial bank credit facility means the bank has done its own risk assessment of the developer. It also means the bank has a financial interest in project completion. A project financed solely from buyer instalments has no such external check.

What is the foreign ownership quota in a Thai condominium?

Under the Condominium Act, foreigners may hold freehold title to units that together represent no more than 49 percent of the total floor area of a condominium building. The remaining 51 percent must be in Thai ownership. Before you buy, ask the juristic person (the legal management body of the building) for the current foreign ownership ratio in writing. If the project is off-plan, ask the developer for the current foreign unit sales figures and the projected quota usage at completion.

What is a sinking fund and do I have to pay it?

A sinking fund is a one-time capital reserve contribution paid by the buyer at the time of title transfer. It is separate from the monthly common-area maintenance fee. The sinking fund is used for major future repairs to common areas and building infrastructure. The amount is set by the condominium's rules, typically 400-800 THB per square metre of your unit (indicative, 2026 market estimate). It is non-refundable and non-transferable. If the previous owner did not pay it, the debt can follow the unit. Your lawyer should confirm the sinking fund status before transfer.

How do I verify whether an EIA was approved for a specific project?

The Office of Natural Resources and Environmental Policy and Planning (ONEP) maintains records of approved EIAs. You can search the ONEP website by project name and location. For a formal confirmation, your Thai lawyer can submit a written inquiry to ONEP or to the local environmental authority in the province. The developer should be able to provide you with the EIA approval number as a matter of routine - refusal to provide it is itself a warning sign.

Is a verbal promise from the developer about delivery dates legally binding?

No. In Thailand, verbal promises and marketing materials are not legally binding contractual commitments. Only what is written into the signed Sale and Purchase Agreement (SPA) carries legal weight. Before you sign, your lawyer must confirm that the SPA states the handover date, specifies a daily financial penalty for late delivery, and defines what constitutes a completed unit. If the SPA is silent on delay penalties, you have no practical financial remedy for late handover.

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