How to Buy Property in Koh Samui: A Step-by-Step Guide for Foreign Buyers

Buying property in a foreign country sounds daunting, but on Koh Samui the process is well-trodden and, with the right help, genuinely straightforward. From an accepted offer to the keys in your hand typically takes four to eight weeks. The key is knowing the sequence, getting the legal checks done properly, and not skipping steps to save time or money. Here is the process, start to finish, for a foreign buyer.

Step 1: Get Your Ownership Structure Clear First

Before you even view, understand what you can own. As a foreigner you cannot own land, so a villa will be held on a registered long lease (typically 30 years) with ownership of the building, while a condominium can be owned freehold within the building's 49% foreign quota. Knowing which route applies to the property you want shapes everything that follows, so settle this before you fall for a specific home. If in doubt, our guide to foreign ownership on Samui covers the structures in detail.

Step 2: Define Budget and Find the Property

Set a realistic all-in budget that includes not just the purchase price but the transfer costs, taxes, and legal fees (typically another 3 to 6% for a freehold purchase, or around 1.1% lease registration for leasehold, plus 150,000 to 300,000 baht in legal fees). Then find the property, ideally through an agent who knows the island and can confirm the ownership structure and quota status before you get attached.

Step 3: Make an Offer and Pay a Reservation Deposit

Once you have found the right property, you negotiate, buyers on Samui typically secure 8 to 12% off the asking price, and on agreement you pay a reservation deposit to take the property off the market while due diligence runs. This deposit should be modest and the terms around it (including what happens if due diligence uncovers a problem) should be clear in writing before you pay.

Step 4: Due Diligence, the Step You Never Skip

This is the heart of a safe purchase. Your independent Thai property lawyer (not the seller's or developer's) conducts the legal checks: verifying the Chanote title deed and that the seller genuinely owns and can sell the property, checking for any mortgages, liens, or encumbrances on the title, confirming building permits and that the property is legally built, and for a leasehold, reviewing the lease terms, renewal provisions, and registration. For a condo, the lawyer confirms the foreign quota has capacity. Skipping or rushing this step is where buyers get badly caught out. It is worth every baht of the legal fee.

Step 5: Sign the Sale and Purchase Agreement

With due diligence clear, both parties sign the Sale and Purchase Agreement. This sets out the price, payment schedule, completion date, what is included (furniture, fittings), and the responsibilities of each side, including how the transfer taxes and fees will be split. Have your lawyer draft or review this, never sign a contract you have not had checked independently.

Step 6: Transfer the Funds Correctly

For a foreigner, this step has a specific legal requirement. Your purchase funds must be transferred into Thailand from abroad in foreign currency, with the stated purpose being the property purchase. Your Thai bank issues a Foreign Exchange Transaction Form (the FET, sometimes called a Tor Tor 3), which documents the inbound transfer. You need this document at the Land Office to register freehold ownership, and the amount should equal or exceed the purchase price. Get this right, because it cannot easily be fixed retroactively.

Step 7: Transfer of Ownership at the Land Office

The final step happens at the Land Department (Land Office), where the transfer is formally registered. Both parties (or their appointed representatives) attend, the balance of funds is paid, the taxes and fees are settled on the day, and ownership, or the registered lease, is recorded. The Land Department does not accept credit cards, so the funds must be arranged in advance. Once registered, the property, or your lease, is legally yours.

How Long Does It All Take?

From accepted offer to completed transfer, expect roughly four to eight weeks. Due diligence is the variable, a clean title on a well-documented property moves quickly, while complications (unclear title, permit issues, quota questions) extend the timeline. Off-plan purchases run on a different clock entirely, tied to the construction schedule.

What Do You Actually Need?

Practically, you need a valid passport, proof that your funds were transferred from overseas (the FET form), the signed Sale and Purchase Agreement, and the title documentation. Your lawyer will guide the exact paperwork for your specific purchase and structure.

The One Piece of Advice That Matters Most

If you take one thing from this guide: use an independent, qualified Thai property lawyer from the start, not one recommended solely by the seller or developer. Their fee is small relative to the purchase, and their job is to protect you, verifying title, structuring the contract, and making sure the ownership you end up with is genuinely secure. Nearly every horror story you will hear about buying in Thailand comes down to someone skipping proper, independent legal advice.

The process is well-established and, handled properly, smooth. At Samui Property Portfolio, we guide international buyers through each of these steps, connect them with trusted independent lawyers, and make sure nothing important gets missed between the offer and the keys. If you would like a clear walk-through for the property you have in mind, we are happy to help.