Before reserving any property, confirm the essentials:
To secure the property, buyers usually sign a reservation agreement.
Never send money without a signed agreement.
This is the most important step when buying property in Thailand.
Legal due diligence protects foreign buyers from:
Lawyer cost: 30,000 to 100,000 THB+ depending on complexity.
Your lawyer should investigate:
Koh Samui has strict regulations.
The lawyer must confirm:
Buying property in Koh Samui Th…
Once due diligence is successful, the lawyer drafts the official Sales & Purchase Agreement.
Typical legal cost: ~30,000 THB.
Your contract should include:
This is the official moment you become the legal owner.
Ownership transfer fees are often split 50/50 between buyer and seller.
In some cases, the buyer may need:
Typical cost: 38,000 THB.
The first step is to find a suitable property and submit an offer.
Once accepted, the seller provides legal documents such as the Chanote land title, ID, building permit, and house registration book
A reservation agreement is then signed, usually with a 10% deposit to secure the property while legal checks are conducted.
It is not legally mandatory — but it is absolutely essential, especially for foreign buyers.
A lawyer will verify:
Land title (Chanote)
Ownership history
Mortgages or debts
Court cases
Zoning regulations
Building permits
Road access and boundaries
Legal due diligence in Koh Samui typically costs 30,000 to 100,000 THB, depending on the complexity.
Skipping this step is one of the biggest mistakes investors make.
The standard deposit is around 10% of the purchase price, paid upon signing the reservation agreement.
This deposit:
Removes the property from the market
Locks in agreed payment terms
Secures the deal while due diligence is ongoing
In some cases, the amount can be negotiated.
After successful due diligence, the lawyer drafts a Sales and Purchase Agreement (SPA)
This contract includes:
Agreed price
Payment schedule
Transfer date
Conditions of sale
If major legal issues are discovered and cannot be resolved within the agreed timeframe, the buyer may cancel the transaction.
Foreigners cannot directly own land in Thailand under their personal name. However, there are common legal structures:
Thai Company structure
Leasehold agreements
Condominium ownership (freehold quota)
In many villa purchases, buyers set up a Thai company before transfer.
Proper legal advice is critical before choosing the structure.
Ownership transfer takes place at the Koh Samui Land Office
Buyer and seller attend in person
Or grant Power of Attorney (POA) to their lawyers
The buyer’s name (or company name) is officially stamped on the back of the Chanote title deed
Transfer fees are usually split 50/50 between buyer and seller.
On average:
Reservation & due diligence: 2–4 weeks
SPA signing: 1 week after legal clearance
Transfer at Land Office: Once final payment is ready
The full process generally takes 3 to 6 weeks, depending on legal complexity and financing.
Estimated costs:
Legal due diligence: 30,000 – 100,000 THB
SPA drafting: Around 30,000 THB
Transfer fees: Usually shared 50/50
Additional costs may apply if:
A Thai company needs to be set up
There are special zoning verifications
Financing structures are involved
Key documents include:
Seller ID
Chanote land title deed
Building construction permit
House registration book (Tabien Baan)
Your lawyer verifies each document before moving forward.
The key to a safe purchase is:
Working with an experienced real estate agency
Hiring an independent lawyer
Conducting full due diligence
Understanding zoning regulations
Koh Samui remains one of Thailand’s most attractive islands for lifestyle buyers and long-term investors.
Thinking about investing in Koh Samui? Book a free 30-minute consultation with James and get expert guidance on your project.
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