In 2025 alone, more than 1,800 residential building permits were issued across Phuket - a 23% year-on-year increase according to data from the Provincial Construction Office. At the same time, our analysts are actively tracking at least a dozen projects with completion delays exceeding 12 months. For any investor committing capital at the off-plan stage, a structured developer due diligence process is the primary layer of protection available in the Thai market.
Our research desk applies a seven-step verification framework before any project enters our tracked datasets. Below we walk through each step with specific warning thresholds and measurable criteria.
Quick answer
- Phuket has more than 140 active developers as of Q1 2026 - track record and financial stability vary considerably across that group
- No escrow mechanism exists for foreign property buyers in Thailand in the European sense; capital protection relies on other contractual and structural safeguards
- Core documents to verify: building permit (Ror. 1), Environmental Impact Assessment (EIA) for projects exceeding 80 units, and the land title deed (Chanote)
- Any prior project delay exceeding 6 months on a developer's track record is treated as a warning threshold in our analysis
- Payment schedules requiring more than 50% of the purchase price before the shell structure is complete are flagged as high-risk in our datasets
- Developers with confirmed construction financing from a Thai commercial bank (such as Bangkok Bank or Kasikornbank) have already passed an independent institutional credit review - our analysts treat this as a meaningful risk-reduction factor
Options and scenarios
Step 1 - Developer track record
We inspect every completed project by a developer on the ground. We assess how many schemes have been delivered, with what delay, and to what quality standard. For developers active in Phuket or Koh Samui for at least five years, our minimum threshold is two completed projects. In Bang Tao and Layan - where development density is highest - we compare the physical condition of buildings three to five years after handover: facade condition, shared infrastructure performance, pool and internal road quality are all observable indicators of construction standards.
Warning threshold: a developer with zero completed projects, or whose entire portfolio carries delays exceeding six months.
Step 2 - Construction financing structure
This is one of the most consequential parameters we assess. A developer funding construction entirely from buyer pre-sales carries materially higher risk of work stoppages if sales slow. Our analysts prefer projects backed by a confirmed construction loan from a Thai commercial bank, because the bank conducts its own independent review of the developer's financial capacity, permit completeness, and land valuation.
Warning threshold: the developer declines to disclose the funding source, or confirms that construction is 100% financed from buyer deposits.
Step 3 - Permit completeness
We verify the full set of legal documentation:
- Chanote (Nor Sor 4 Jor) - the highest-grade land title in Thailand, confirmed by full cadastral survey. Other forms such as Nor Sor 3 Gor carry meaningfully higher legal risk
- Building permit (Ror. 1) - issued by the relevant local authority (OrBorTor or Tessaban)
- EIA report - required for condominium projects above 80 units or buildings exceeding 23 metres in height
- Company operating licence - verified through the Department of Business Development (DBD)
Any missing document at the point of sale is sufficient grounds for exclusion from our tracked project lists.
Step 4 - Payment schedule versus construction progress
Because no escrow mechanism exists for foreign buyers in Thailand, the structure of the payment schedule is the primary contractual safeguard. The schedule we treat as a safe baseline in our analysis looks as follows:
- Reservation fee: 100,000 - 200,000 THB
- Contract signing payment: 20-30% of purchase price
- Milestone payments: tied to documented construction progress (foundations, shell structure, fit-out)
- Final payment on handover: minimum 20-30% of purchase price
Warning threshold: any schedule requiring more than 50% of the purchase price before the closed shell structure is complete.
Step 5 - Contractual protections
We review purchase agreements for the following provisions:
- Delay penalties - the market standard is 0.01-0.05% per day of the paid amount. Absence of a penalty clause is a serious warning signal
- Withdrawal rights - whether the buyer can exit with full deposit refund in the event of a delay exceeding, for example, 180 days
- Technical specification - whether the contract includes a detailed schedule of materials and finish standards
- Dispute resolution clause - jurisdiction and arbitration mechanism
In our practice we regularly encounter contracts drafted exclusively in Thai. In those cases we require a certified English translation before any signing recommendation is made.
Step 6 - On-site construction inspection
We visit construction sites in person. A physical visit allows us to assess:
- Actual construction progress against the declared schedule
- Workforce and equipment levels on site (a near-empty site with two or three workers is a reliable indicator of cash flow problems)
- Quality and volume of materials stored on site
- Conformity with the approved architectural plans
In Koh Samui, particularly in Bophut and Maenam, we additionally monitor road access status. Some plots have only right-of-way access through a private soi, which can generate practical and legal complications for residents and future resale.
Step 7 - Developer financial health
Financial data for Thai-registered companies is publicly available through the Department of Business Development database (dbd.go.th). Our analysts review:
- Registered capital - for a project valued at 200 million THB, we look for registered capital of at least 20-30 million THB
- Liability history - outstanding debts to subcontractors are visible in the court registry
- Ownership structure - frequent changes in shareholders or directors can indicate instability
Comparison table
| Parameter | Low-risk developer | Medium-risk developer | High-risk developer |
|---|---|---|---|
| Completed projects | 3 or more, no significant delays | 1-2, delays under 6 months | Zero completed, or delays exceeding 12 months |
| Construction financing | Bank construction loan plus pre-sales | Mixed, partially disclosed | 100% funded from buyer deposits |
| Permits | Full set: Chanote, Ror.1, EIA | Chanote and Ror.1, no EIA | Building permit absent |
| Payments before shell complete | Below 40% of purchase price | 40-50% of purchase price | Above 50% of purchase price |
| Delay penalties in contract | 0.01-0.05% per day | Fixed lump-sum penalty | No penalty clause |
| Registered capital vs project value | Above 15% | 5-15% | Below 5% |
| Financial data availability | Full filings in DBD | Partial data | Disclosure refused |
Risks and mistakes
Risk 1 - relying on marketing materials. Renderings and brochures are not a substitute for permit verification. In 2025, our analysts tracked at least four projects in Phuket that were actively selling units without a valid building permit in place.
Risk 2 - purchasing without an on-site visit. Drone footage does not reveal concrete quality or the number of workers on site. Buyers purchasing remotely should commission an independent physical inspection before committing funds.
Risk 3 - failing to verify land title. In Koh Samui, including areas such as Lamai and Chaweng, our team regularly encounters plots with Nor Sor 3 Gor title, which does not provide the same level of legal protection as a full Chanote. We treat Chanote as the only fully safe title for residential investment purposes.
Risk 4 - accepting an aggressive payment schedule. Our analysts decline to include projects in our recommendations where the developer requires more than 50% of the purchase price before the closed shell structure is complete. This is a firm threshold, not a guideline.
Risk 5 - overlooking tax reporting obligations. Investors who are tax residents in their home country should verify whether foreign asset reporting thresholds apply to their Thai property holdings. Rental income generated in Thailand may be subject to tax in both jurisdictions; Thailand has bilateral double-taxation treaties with a number of countries that allow tax paid in Thailand to be credited against home-country liability. We recommend seeking specialist tax advice before completing a purchase.
FAQ
Does Thailand have any mechanism to protect off-plan buyer deposits?
Thailand does not operate an escrow mechanism for foreign property buyers in the sense familiar from many Western markets. Capital protection relies instead on a combination of payment schedule structure tied to construction milestones, contractual penalty clauses for delay, and withdrawal rights negotiated into the purchase agreement.
How can I verify a developer's financial history in Phuket?
Financial records for Thai-registered companies are publicly accessible through the Department of Business Development portal (dbd.go.th). Registered capital, ownership structure, and annual financial statements can all be retrieved there. Per market estimates, a standard company report costs approximately 500 THB to download.
How many completed projects should a credible developer have?
In our research framework, the minimum threshold is two completed projects with no delay exceeding six months. A developer with zero prior completions requires a substantially more intensive financial and legal review before we would include the project in our datasets.
What is a Chanote and why does it matter for property buyers in Thailand?
Chanote (Nor Sor 4 Jor) is the highest-grade land title available in Thailand, confirmed by full cadastral survey and registered at the Land Department. Other title forms, such as Nor Sor 3 Gor, do not carry the same level of legal security and can complicate future transfers or financing.
What payment schedule structure is considered safe for off-plan purchases in Phuket?
Based on our analysis, a safe schedule involves no more than 30% of the purchase price at contract signing, subsequent tranches tied to documented construction milestones, and a minimum of 20-30% of the price payable only on handover of the completed unit.
Is a building permit required before a developer can begin pre-sales in Thailand?
Thai law requires a valid building permit (Ror. 1) before construction works commence, but does not explicitly prohibit pre-sales activity in advance of the permit being issued. Our practice is to exclude any project from our tracked lists that does not hold a valid building permit at the point of active sales.
When is an EIA report required and what does it cover?
An Environmental Impact Assessment is mandatory for condominium projects exceeding 80 units or buildings taller than 23 metres. The approval process typically takes six to twelve months. A project that legally requires an EIA but does not have one approved carries a meaningful risk of construction being halted by the authorities.
What does a full developer due diligence review cost in Thailand?
A comprehensive legal and financial review, covering contract analysis and a physical site inspection, costs per market estimates between 30,000 and 80,000 THB. For a typical investment transaction, this represents a small fraction of one percent of the purchase price.
Researching property in Phuket or Koh Samui? Get in touch - our analysts will prepare a data brief for your shortlisted location.