Due Diligence Buying Property in Thailand — Complete Checklist 2026
A thorough due diligence process before buying property in Thailand takes 2–4 weeks and costs $600–$1,800 in lawyer fees. This checklist covers every check you must complete.
Due Diligence Buying Property in Thailand — Complete Checklist 2026
Due diligence for a Thai property purchase covers three areas: legal (title, permits, encumbrances), physical (condition, construction quality, snagging), and financial (developer solvency, management fees, return projections). A thorough process takes 2–4 weeks before signing the Sale and Purchase Agreement and should always be managed by an independent Thai lawyer — not the developer’s legal team. The cost is $600–$1,800 in lawyer fees for most transactions, which is trivial relative to a $100,000–$500,000 investment.
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Due Diligence Checklist: Overview
| Category | Checks | Time Required | Who Performs |
|---|---|---|---|
| Title and legal | 8 checks | 3–7 days | Thai lawyer |
| Developer background | 5 checks | 2–5 days | You + lawyer |
| Building permits | 3 checks | 3–7 days | Thai lawyer |
| SPA review | 10+ clauses | 3–7 days | Thai lawyer |
| Physical inspection | Full snag | 1 day | You + inspector |
| Financial review | Yield analysis | 2–3 days | You + agent |
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Part 1: Legal Due Diligence
1.1 Title Deed (Chanote) Verification
The Chanote (Nor Sor 4 Jor) is Thailand’s highest-grade land title — the only title document that provides full legal certainty. Your lawyer should:
- Obtain the original or certified copy of the Chanote from the Land Department (not from the developer — verify independently)
- Verify registered owner: The seller’s name should match the Chanote exactly. Discrepancies require explanation
- Check encumbrances: Look for registered mortgages, liens, usufructs, leases, or any annotations on the title
- Confirm land boundaries: The Chanote should match the actual property boundaries. For land/villa purchases, boundary survey verification is advisable
- Check for seizure orders: Government agencies (Revenue Department, courts) can place seizure orders on land; these appear on the Chanote
Title Types and Their Safety:
| Title Type | Safety | Surveyability | For Foreigners |
|---|---|---|---|
| Chanote (Nor Sor 4 Jor) | ⭐⭐⭐⭐⭐ | Full GPS survey | Best |
| Nor Sor 3 Gor | ⭐⭐⭐⭐ | Surveyed | Good |
| Nor Sor 3 | ⭐⭐⭐ | Partially surveyed | Acceptable |
| Sor Kor 1 | ⭐ | No proper survey | Avoid |
| Por Bor Tor 5 | ⭐ | Possession only | Avoid |
Recommendation: Only purchase properties with Chanote or Nor Sor 3 Gor titles.
1.2 Condominium Registration (For Condo Purchases)
For condominium units, additionally verify:
- The building is registered as a condominium under the Condominium Act (request the condominium registration certificate)
- The foreign quota status — how much of the 49% has been used
- Your specific unit is within the foreign quota allocation
- The unit number on the Chanote matches the unit you’re purchasing
- The condominium juristic person (the building management body) is properly constituted
1.3 Encumbrance Check
A comprehensive encumbrance search at the Land Department reveals:
- Mortgages: If the developer has mortgaged the land/building as construction financing, this mortgage must be released before or simultaneously with your title transfer. Ensure the SPA addresses how the developer’s construction mortgage is discharged
- Registered leases: Existing leases that predate your intended purchase
- Usufructs and superficies: Any registered usage rights
Danger signal: A developer who refuses to allow your lawyer to search the title independently (insisting on providing their own documents) is hiding something.
Part 2: Developer Due Diligence
2.1 Developer Track Record
| Check | What to Look For | Source |
|---|---|---|
| Years in operation | Minimum 5 years preferred | Company registration records |
| Completed projects | 2+ completed and delivered | Physical visits, reviews |
| Online reputation | Reviews on Google, Thailand forums | Search “[Developer Name] + forum” |
| Litigation history | Pending cases or judgments | Thai court records (lawyer) |
| Financial statements | Published accounts or company filings | DBD (Department of Business Development) |
2.2 Project-Level Checks
| Check | Purpose |
|---|---|
| EIA approval | Environmental Impact Assessment — required for large projects |
| Building permit (Bai Anuyat) | License to construct; must be in place before you pay |
| Sales volume | What % of units are sold? 40%+ suggests commercial viability |
| Construction insurance | Protects against contractor default during build |
| Escrow arrangements | Are buyer deposits held in escrow or in operating accounts? |
2.3 Management Company Assessment
For investment properties with rental programs:
- Who manages the rental pool? (In-house developer vs. independent operator)
- What is the track record of occupancy rates in the developer’s other projects?
- What are the management fees? (Typically 25–40% of gross rental revenue)
- What is the fee structure for maintenance and sinking fund?
- Is the rental guarantee (if offered) backed by a real performance bond or just contractual?
On rental guarantees: A developer offering 7–10% guaranteed returns for 2–5 years should be scrutinized carefully. These guarantees are contractual obligations only — if the developer cannot generate sufficient revenue, you may struggle to enforce the guarantee against an insolvent company. The guarantee is only as good as the financial health of the guarantor.
Part 3: Sale and Purchase Agreement Review
The SPA is the binding contract — every clause matters. Your lawyer should specifically review and negotiate:
Critical SPA Clauses
| Clause | What to Check |
|---|---|
| Completion date | Specific date (not “estimated”); penalty for delay (0.1–0.2%/day is reasonable) |
| Force majeure | Should not include economic downturns, slow sales, or COVID-like catch-alls |
| Unit specifications | Detailed schedule of finishes, fixtures, appliances |
| Warranty period | Minimum 1–2 years for construction defects; 3–5 years is better |
| Cancellation terms | Conditions under which each party can cancel and refund terms |
| Maintenance fees | What is the monthly sinking fund and maintenance fee? How are increases governed? |
| Payment schedule | Tied to construction milestones (preferred) vs. calendar dates |
| Ownership structure | Confirms freehold Chanote in your name, or leasehold with specific registration terms |
| Dispute resolution | Thai courts (preferred) vs. arbitration |
| Transfer costs | Who pays what government fees at registration |
Developer-Favorable Clauses to Reject
- Completion date described as “on or about” with no penalty for delay
- Force majeure so broad it excuses virtually any delay
- No specification of finish quality — “developer’s discretion” for materials
- Cancellation terms that forfeit all your payments if you withdraw for any reason
- Automatic price adjustment clauses based on construction cost increases
Part 4: Physical Due Diligence
For Off-Plan Purchases
Before signing for an off-plan unit:
- Visit the construction site if possible — assess actual progress vs. marketing materials
- Review architectural drawings and specification schedules
- Confirm the views and orientations shown in the floor plans match the actual building position
- Understand what common facilities are included (pool, gym, lobby) and their planned completion dates
- Verify the developer’s contractor is established (not a first-time or undercapitalized builder)
For Resale Purchases
Before accepting handover of a resale unit:
- Full snagging inspection — engage an independent property inspector
- Check: walls, floors, ceiling (cracks, damp, water damage), plumbing (pressure, leaks), electrical (circuit testing), air conditioning (cooling performance), windows and doors (seals, locks), built-in furniture (quality, damage)
- Review historical service charges and any outstanding levies
- Confirm no outstanding utility bills attached to the unit
- Check the building’s common areas and management records (sinking fund balance, maintenance history)
Part 5: Financial Due Diligence
Yield Analysis
For investment purchases, validate the developer’s yield projections:
| Factor | Developer Claims | Independent Reality Check |
|---|---|---|
| Occupancy rate | 80–90% | Phuket average: 65–75% (Tourism Council of Thailand data) |
| Nightly rate | ”Market rate” | Check Airbnb/Booking.com for comparable units in the area |
| Management fee | 25–35% deduction | Confirm in writing; 40% is common in practice |
| Net yield | 7–10% | Realistic range: 5–8% net after all deductions |
Ongoing Costs Budget
| Cost | Typical Amount | Frequency |
|---|---|---|
| Maintenance fee | 40–80 THB/m²/month | Monthly |
| Sinking fund | 20–40 THB/m²/month | Monthly |
| Utility bills | Variable | Monthly |
| Property manager fee | 25–40% of rental income | Per booking |
| Thai income tax on rentals | 15–35% of income | Annual |
| Annual property tax | 0.02–0.1% of appraised value | Annual |
| Insurance | THB 3,000–15,000/year | Annual |
Example for a 45m² unit with $140,000 purchase price:
- Annual gross rental (70% occupancy at $80/night): ~$20,440
- Management fee (30%): -$6,132
- Maintenance + sinking fund: -$2,160
- Property tax: -$280
- Insurance: -$400
- Net yield: approximately 8.2% (before Thai income tax)
Due Diligence Timeline
| Week | Activities |
|---|---|
| Week 1 | Engage lawyer; request Chanote and condominium registration; begin developer research |
| Week 2 | Title search at Land Department; building permit verification; developer background check |
| Week 3 | SPA review; negotiation of terms; physical inspection (resale) or site visit (off-plan) |
| Week 4 | Final SPA agreed; FET form arranged; signing |
Pros and Cons of Thorough Due Diligence
Pros
- Eliminates the most serious legal risks before any binding commitment
- Provides negotiating leverage to improve SPA terms
- Confirms the property is what the developer claims
- Identifies cost surprises (maintenance fees, sinking fund, management deductions)
- Provides peace of mind for a major financial decision
Cons
- Costs $600–$1,800 in lawyer fees — unavoidable
- Takes 2–4 weeks — may cause you to miss a “limited offer” (be skeptical of these anyway)
- Can reveal deal-breakers that require walking away from a property you like
Frequently Asked Questions
A thorough due diligence process takes 2–4 weeks from engaging a lawyer to signing a reviewed SPA. The title search and condominium registration verification take 3–7 days. SPA review and negotiation take 3–7 days. Doing all this simultaneously with developer background checks means 2–3 weeks is realistic for most transactions. Rushing due diligence to hit an artificial deadline is a mistake.
The title deed (Chanote) verification is the most important single check. You must confirm: the seller is the registered owner, the title is a Chanote (not a lesser title type), there are no encumbrances (mortgages, leases, liens), and for condos, that the foreign quota is available and the unit is within that quota. All of this must be verified by your lawyer directly at the Land Department — not via documents provided by the developer.
Not legally required, but practically essential. The risks of proceeding without an independent Thai lawyer — title defects, invalid ownership structures, unenforceable contracts, loss of FET form requirements — are too significant for any investment over $50,000. Lawyer fees are typically $600–$1,800, which is 0.3–1.8% of the purchase price. This is the best-spent money in any Thai property transaction.
An Environmental Impact Assessment (EIA) is required for hotel and resort development projects exceeding certain thresholds. For condominiums above 80 units, for beachfront developments, and for large villa projects, EIA approval from the relevant authority is required before construction. Projects built without required EIA approval face legal challenge, and units in such projects can be difficult to sell or rent legally. Your lawyer should verify EIA status as part of due diligence.
Yes. Most due diligence tasks — title search, lawyer review, developer background check — can be completed remotely by a Thai lawyer on your behalf. Physical inspection of resale units is harder to do remotely; you can hire an independent local property inspector for THB 5,000–15,000 ($150–$450). For off-plan purchases, physical inspection is less critical since the property isn't built yet — focus on the developer's track record and financial health instead.
Choose a lawyer who: specializes in property law (not general practice), has experience with foreign buyer transactions in your target area, charges fixed fees (not a % of the transaction), has no commercial relationship with the developer you're buying from, is fluent in English (for non-Thai speakers), and is registered with the Thai Lawyers Council. Referrals from other foreign buyers in Phuket expat communities are one of the most reliable ways to find good lawyers.
Read Also
- Legal Mistakes Foreigners Make Buying Property in Thailand
- Thailand Condo Title Deed (Chanote) Explained
- Safest Ownership Structures in Thailand for Foreigners
- How Foreigners Own Condos in Thailand — Step by Step
- Thailand Property Tax for Foreigners
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The MORE Group team has helped 500+ European and American buyers purchase property in Thailand. We provide legal support, 0% commission, and on-the-ground expertise since 2018.
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