Phuket Property Due Diligence Checklist: 20 Things to Check

Due diligence in Thai property is not optional — it’s the difference between a successful investment and an expensive legal problem. This checklist covers the 20 most important checks you or your lawyer should complete before signing any binding agreement in Phuket.

Use this as a systematic guide. Each item represents a real risk that has affected real buyers.

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Legal and title checks

1. Title deed type verification

What: Confirm the property has a Chanote (NS4J) title deed — the only fully secure title in Thailand. Why: Weaker titles (NS3, NS3Kor, Sor Por Gor) have limitations on rights, encumbrances, and enforceability. Who does it: Your lawyer, at the Land Department. Red flag: Any title weaker than Chanote for an investment property.

2. Title encumbrance check

What: Search the Land Department records for any mortgages, liens, easements, court orders, or third-party rights registered against the title. Why: If the property is mortgaged, you could inherit the debt unless it’s discharged before transfer. Who does it: Your lawyer. Red flag: Any registered encumbrance not disclosed by the seller.

3. Foreign quota verification (condominiums)

What: Confirm the condominium has sufficient remaining foreign quota (49% maximum) for your freehold purchase. Why: If quota is full, you cannot receive freehold title — only leasehold. Who does it: Your lawyer, at the Land Department. Timing: Must be done BEFORE paying any deposit.

4. Land boundary confirmation

What: Verify that the land boundaries on the title deed match the physical boundaries of the property. Why: Boundary disputes are a real risk — particularly for villas where adjacent land ownership may be disputed. Who does it: A licensed surveyor (for villas); your lawyer reviews title against developer plans for condos.

5. Zoning and planning permission

What: Confirm the property is in a zone permitting residential use, and that the building has proper planning permission and construction license. Why: Illegal construction (built outside planning permission) can be demolished. Check with the local municipality. Who does it: Your lawyer, checking with the municipality (Tesaban).

Developer and project checks

6. Developer track record verification

What: Research the developer’s completed projects, delivery history, and construction quality. How: Visit completed buildings, speak with existing residents, check for complaints or legal actions. Red flag: Developer with no completed projects, numerous complaints, or a history of delivery delays.

7. Developer company registration

What: Verify the developer is a properly registered Thai company in good standing with the Department of Business Development. Why: An unregistered or dissolved company cannot legally enter binding contracts. Who does it: Your lawyer.

8. EIA approval (for large projects)

What: Confirm the project has received Environmental Impact Assessment clearance from the government if required. Why: Projects without EIA clearance can face stop-orders or demolition demands. Threshold: Generally required for projects with 79+ units or those in environmentally sensitive areas. Who does it: Your lawyer; the developer should be able to produce the certificate.

9. Construction license validity

What: Verify the building permit for the development is current and valid. Why: Construction on an expired or invalid permit creates title issues. Who does it: Your lawyer, checking with the municipality.

10. Land ownership by developer

What: Confirm the developer actually owns (or has a valid long-term lease on) the land on which the development sits. Why: Some developers market projects on land they don’t control — an extreme risk. Who does it: Your lawyer, verifying the Chanote of the land parcel.

Financial and commercial checks

11. Condominium juristic person financial health

What: Review the building’s maintenance fee account, sinking fund balance, and any outstanding debts. Why: A building with insufficient sinking fund has deferred maintenance that will be funded by future special assessments (additional charges to owners). Who does it: Request the financial statements from the juristic person; your lawyer reviews. Red flag: Sinking fund balance below the equivalent of 6 months’ maintenance collections; outstanding loans.

12. Outstanding maintenance fees for the unit

What: Confirm the specific unit you’re buying has no outstanding maintenance fee arrears. Why: Unpaid fees can transfer to the new owner’s liability. Who does it: Request a clearance letter from the juristic person.

13. Payment plan fund security (off-plan)

What: Understand where your instalment payments are held — developer’s operating account, escrow, or other. Why: If the developer goes bankrupt and your money is in their operating account (not protected escrow), recovery is very difficult. Who does it: Your lawyer negotiates escrow terms; not always achievable but worth pursuing. Best practice: At minimum, request proof that the project has a bank lending facility (a sign the developer has institutional backing).

14. FET documentation for freehold eligibility

What: For completed property purchases, confirm you can transfer funds from overseas in foreign currency to obtain an FET certificate. Why: Freehold title transfer requires FET documentation. Using locally held THB funds will typically only produce leasehold. Who does it: You (coordinate with your bank); your lawyer advises on the process.

SPA and contractual checks

15. SPA key terms review

What: Your lawyer reviews and ideally negotiates the following:

Delivery date and delay penalties (should be meaningful — 0.1%+ per day is better than 0.01%)
Handover acceptance conditions (clear process for snagging and defect remedy)
Termination rights (if developer fails to deliver, what are your options?)
Force majeure clauses (how broadly defined?)
Payment milestone triggers (linked to construction progress, not just calendar dates)

Who does it: Your lawyer. Never sign a developer SPA without independent legal review.

16. Rental operation permissions

What: Confirm whether the SPA and condominium regulations permit short-term rental of your unit. Why: Some buildings restrict rental frequency or minimum rental periods. Who does it: Your lawyer reviews condominium bylaws and SPA.

17. Management contract review (if applicable)

What: If the developer offers a mandatory management program, review the management agreement terms. Key terms to check: Fee structure (gross or net basis), occupancy guarantees (legally enforceable or just marketing?), termination provisions, what happens to management at year 5/10. Who does it: Your lawyer.

Post-purchase operational checks

18. Property management company selection

What: Research and select a property management company before committing to purchase. Why: Management quality determines yield. A bad manager can halve your income vs market potential. How: Request occupancy track records from 3 managers for comparable units in the same zone; check online reviews; speak with existing owner clients.

19. Insurance verification

What: Confirm that the condominium has building insurance through the juristic person, and plan for your own unit contents and liability insurance. Who does it: You request the insurance policy from the juristic person; you purchase unit insurance.

20. Exit strategy verification

What: Before buying, understand who your eventual buyer will be and whether they can access freehold title. Key questions:

Is the foreign quota likely to be available for the eventual buyer?
Do you have (or will you maintain) your FET certificates for resale?
Is the developer brand recognized enough to support international resale?

Why: Buying a property you cannot efficiently exit costs you significantly.

Summary checklist

Category	Checks
Legal / title	1. Title type, 2. Encumbrances, 3. Foreign quota, 4. Boundaries, 5. Zoning
Developer / project	6. Track record, 7. Company registration, 8. EIA, 9. Building permit, 10. Land ownership
Financial	11. Juristic finances, 12. Fee arrears, 13. Payment security, 14. FET eligibility
SPA	15. Key terms, 16. Rental permissions, 17. Management contract
Operational	18. Management selection, 19. Insurance, 20. Exit strategy

Completing this checklist takes approximately 2–4 weeks with a competent Thai property lawyer. This is not overhead — it’s the foundation of a sound investment.

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Frequently Asked Questions

What is the most important due diligence check when buying in Phuket?

For foreign condo buyers, verifying foreign quota status (check 3) before paying any deposit is arguably the most time-sensitive check — it must be done before you commit funds. For off-plan buyers, the developer track record (check 6) and SPA key terms (check 15) are the checks that most affect your long-term outcome.

How long does due diligence take for a Phuket property purchase?

A comprehensive due diligence covering all 20 checks typically takes 2–4 weeks with a competent Thai property lawyer. The most time-consuming steps are the Land Department searches (1–5 days), developer investigation (1–2 weeks), and SPA negotiation (1–2 weeks). Don't let agents pressure you to skip or rush this process.

Do I need a lawyer to perform due diligence in Thailand?

Yes, for most checks. Lawyers perform the Land Department searches, verify developer company registration, review EIA certificates, and negotiate SPA terms. You should engage an independent Thai property lawyer who works exclusively for you — not the developer's recommended counsel.

What happens if due diligence reveals a problem?

It depends on what's found. Minor issues (outstanding maintenance fees) can be resolved as a condition of sale. Serious issues (failed EIA, title encumbrances, foreign quota full) may require renegotiating terms or walking away. Finding issues during due diligence — before signing — is far better than discovering them after you've paid.

Is due diligence different for off-plan vs completed properties?

Yes. For completed properties, you can physically inspect the unit and verify the building's condition. For off-plan, due diligence is more developer-focused: track record, financial health, SPA terms, and payment security are the critical checks since you can't inspect what doesn't yet exist. Off-plan requires more faith in the developer — hence the need for more thorough investigation of their credentials.