Is buying a villa in Koh Samui riskier now?

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Is buying a villa in Koh Samui actually riskier now?

Yes. Buying a villa in Koh Samui is riskier today than it was a few years ago, mainly because questionable ownership structures are facing much more scrutiny while villa supply and infrastructure pressure have both increased.

The clearest change is enforcement. Thai law restricting foreign land ownership has been around for decades, but the authorities are now looking much more closely at companies suspected of using Thai nominee shareholders for foreign-controlled property businesses.

The latest numbers make the scale clearer. Thai PBS recently reported that authorities had identified 61 targeted companies in Koh Samui, leading to 60 cases involving 88 suspects, including 62 foreigners. The companies were linked to 42 plots of land and buildings valued at roughly THB1.5 billion. Earlier in the investigation, the Department of Special Investigation and Department of Business Development had screened 11,426 companies across Koh Samui and Koh Phangan to identify higher-risk structures.

Yet Koh Samui's property market itself is hardly collapsing. Colliers' latest residential review still described strong foreign demand and estimated annual price appreciation of around 7.5% in prime villa areas, rising to roughly 8.5% for beachfront and sea-view property. C9 Hotelworks valued the island's primary residential market at THB30.3 billion.

So Koh Samui can still be a very good place to own the right villa, while the consequences of buying the wrong one have become much more serious.

What is changing in Koh Samui?	Direction	Importance for buyers	Who should care most?
Nominee-company investigations	Risk rising sharply	Very high	Foreign buyers using companies
Villa and residential supply	Rising	High	Rental investors
Prime villa prices	Still rising	Positive	Owners of scarce properties
Tourism demand	Still strong	Positive	Rental investors
Water and power pressure	Still visible	Moderate to high	Poorly serviced developments
Foreign land-ownership law	Broadly unchanged	High	Every foreign buyer

Why are Koh Samui villa companies getting so much attention now?

Koh Samui has become one of Thailand's main testing grounds for nominee-company enforcement, and the investigation has moved well beyond a few isolated property cases.

The Department of Special Investigation and Department of Business Development chose Koh Samui and Koh Phangan as the first targets of a broader campaign against concealed foreign ownership. Officials initially screened 11,426 companies and classified them according to risk.

What they found explains why the campaign kept expanding.

During one investigation, officials found more than 100 companies registered at the same address. Another case involved a legal office connected with more than 150 companies, while investigators said that over 100 related entities held property and other assets worth roughly THB795 million at purchase prices. Financial checks suggested that much of the underlying capital had come from foreigners.

One particularly large Koh Samui case involved a luxury-villa development in Bo Phut. DSI said the company held 15 plots covering almost 98 rai, with the land valued at approximately THB1.57 billion. Investigators also reported nearly THB2 billion moving through its bank accounts, much of it transferred from abroad.

The latest phase has now produced 60 criminal cases involving 88 suspects.

Authorities are tracing company registrations, shareholder relationships, land holdings and funding rather than simply checking whose names appear on the share register. For foreign villa buyers today, a company structure needs to make sense economically as well as legally on paper.

Are foreigners suddenly banned from buying Koh Samui villas?

No. Foreigners can still buy and control Koh Samui villas through lawful structures, but buying the underlying Thai land directly remains heavily restricted.

The Department of Lands still states that direct foreign acquisition of residential land is available only under a narrow exception. A qualifying foreign buyer generally needs at least THB40 million invested in Thailand for at least five years, permission from the Minister of Interior and no more than one rai of residential land.

That route bears little resemblance to the normal Koh Samui villa transaction.

Most foreign buyers instead encounter long leases, arrangements separating ownership of a building from rights over the land, or companies that hold the land.

The company route is where things become sensitive. A genuine Thai company carrying on a genuine business can own property. Problems arise when Thai shareholders exist mainly to make a foreign-controlled land purchase look Thai.

So the law has not suddenly turned against foreign villa ownership. Enforcement is simply getting much less tolerant of structures that were always difficult to defend.

Is using a Thai company to own a Koh Samui villa still safe?

A real Thai business can still own Koh Samui property, but a company created mainly to give a foreign buyer effective control of Thai land has become a much harder structure to justify.

Recent investigations show what officials are looking for. They are checking whether Thai shareholders actually invested their own money, whether the foreigner supplied the capital, who controls company decisions and whether the same supposedly independent Thai shareholders repeatedly appear across unrelated foreign-owned businesses.

Those checks have already exposed some extraordinary patterns. DSI found one legal-office network associated with more than 150 companies. More than 100 entities were registered at one office. Authorities also traced foreign money into companies whose formal shareholder structures suggested Thai control.

A company with real Thai shareholders, genuine economic activity, proper accounts and an ownership structure that reflects reality faces a very different level of risk.

A shell in which the foreign buyer provides the money, makes every decision and uses Thai names mainly to satisfy the shareholding percentages sits directly inside the behaviour authorities are investigating.

Company setup	What authorities are likely to see	Current risk
Genuine Thai operating business	Real shareholders, capital and activity	Normal compliance risk
Company with genuine Thai investors	Real economic participation	Case-specific
Foreign buyer funds practically everything	Possible concealed foreign control	High
Thai shareholders supplied mainly as names	Classic nominee concern	Very high
Registered lease instead of land-owning company	Foreign buyer openly leases Thai land	Much lower nominee exposure

Could a foreign owner actually lose a Koh Samui villa?

Yes. A foreign buyer can ultimately lose control of a Koh Samui property if the land was acquired through an unlawful structure, although there is no evidence of a general campaign to seize legitimate foreign-owned villas.

Thai land law allows forced disposal in situations where land has been acquired contrary to the restrictions applying to foreigners. Some current Koh Samui investigations also involve alleged Foreign Business Act offences, money flows and other possible offences, which can make a serious case considerably bigger than a technical registration problem.

The important part is scale.

Authorities recently reported 60 cases involving 61 targeted companies after examining a vastly larger universe of businesses on the islands. The crackdown is real, but those numbers do not support the idea that ordinary foreign villa owners are collectively about to lose their homes.

Risk depends heavily on how the villa was acquired.

Someone holding a properly registered lease from an independent Thai landowner has a very different problem set from someone who secretly supplied all the capital for Thai nominees to acquire the land.

Today, we would approach any Koh Samui purchase with a simple test: could the buyer explain the entire ownership and funding structure to an investigator without relying on “this is how everyone does it”?

Is leasehold safer than company ownership for Koh Samui villas now?

For many foreign buyers, a properly registered Koh Samui lease is currently easier to defend than a company structure designed mainly around land ownership, although leasehold comes with one obvious cost: the clock is running.

Thai government guidance continues to describe 30 years as the normal maximum lease term. Contracts are often advertised as 30+30+30 years, but later renewals depend on contractual arrangements and future cooperation from the lessor. They do not magically turn the initial lease into 90 years of guaranteed ownership.

That weakness should be priced properly.

Even so, a transparent limitation can be preferable to a supposedly permanent ownership structure that may fall apart if its shareholders are found to be nominees.

Buyers can also encounter arrangements involving separate ownership of the villa building, superficies and succession protections. The correct package depends on the property and needs independent Thai legal advice.

In today's enforcement environment, a clean 30-year registered right can look considerably better than an artificial version of “freehold” whose legality depends on nobody looking too closely.

Are Koh Samui villa prices already falling because foreign buyers are nervous?

No. We still do not see broad evidence that legal concerns are pushing Koh Samui villa prices into decline, particularly in prime areas.

Colliers' latest residential review estimates around 7.5% annual appreciation in prime villa zones and approximately 8.5% for beachfront and sea-view property. The same research says foreign buyers remain the main source of villa demand, particularly Europeans and Australians.

C9 Hotelworks provides another useful view of the market. It counted 2,882 developer-owned units for sale across 117 residential projects, representing approximately THB30.3 billion of primary inventory.

Those numbers describe a growing market with meaningful supply, rather than a distressed one.

The legal crackdown can still affect pricing indirectly. Buyers who understand the issue are likely to be much less enthusiastic about inheriting an opaque land-owning company, particularly when cleaner alternatives are available.

For now, the evidence points to legal risk becoming more property-specific before becoming an island-wide price problem.

Is Koh Samui getting overbuilt with villas?

Koh Samui is adding enough property and rental inventory that buyers can no longer assume every new pool villa will rent well simply because the island is popular.

C9 Hotelworks measured a 34% year-on-year increase in independent villa-rental supply by January 2025. Even more revealingly, occupancy still climbed by 5.7 percentage points to 71.5%.

Strong demand absorbed plenty of the new inventory.

But owners paid for that occupancy through pricing. Average nightly rates fell 11% to THB13,012. Working backward, the comparable rate a year earlier was roughly THB14,620.

If we combine rate and occupancy, we get an approximate revenue-per-available-night figure of THB9,304 in the later period versus around THB9,620 previously. Despite significantly higher occupancy, the simple revenue proxy fell by roughly 3%.

That is more useful than calling Samui either “booming” or “oversupplied.” Demand is healthy, but supply is making owners compete harder.

Development is also heavily concentrated. C9 counted 2,030 of the island's 2,882 primary-market units in Bo Phut, which includes the broader Chaweng and airport area. That is roughly 70% of the island's developer inventory. Maret represented around 15% and Mae Nam another 9%.

Bo Phut deserves its popularity: airport access, beaches, restaurants, schools and established tourism all attract buyers. Yet simply owning a villa “in Bo Phut” is becoming less of a differentiator when so much competing stock sits in the same area.

Scarcity now comes from much more specific things: an unobstructed view, genuine beach access, exceptional architecture, privacy, usable land or a location that cannot easily be replicated by the next development.

Koh Samui rental indicator	Earlier period	Later period	Change
Independent villa supply	100 index	134 index	+34%
Occupancy	65.8%	71.5%	+5.7 pts
Average nightly rate	~THB14,620	THB13,012	-11%
Approx. revenue per available night	~THB9,620	~THB9,304	~-3.3%

Is Koh Samui tourism still strong enough to support villa rentals?

Yes. Koh Samui tourism remains strong enough to support a large villa-rental market, although strong visitor numbers no longer guarantee strong returns for every owner.

Colliers reported around 1.13 million airport arrivals by April 2025, up about 9% from the previous year, with European and Australian travel supporting the increase.

Surat Thani province, which includes Koh Samui, Koh Phangan and Koh Tao, recorded more than 7.4 million visitors and roughly THB109 billion of tourism revenue during 2024, according to Ministry of Tourism and Sports statistics published through Thailand's National Statistical Office.

The villa numbers show how deep that demand has become. Independent rental supply expanded 34%, yet occupancy still increased to 71.5%.

That would be difficult to reconcile with the idea that tourists are abandoning Koh Samui.

The pressure is on pricing: owners had to accept average nightly rates 11% below the previous comparable period even while filling more nights. Tourism remains a strong support for the property market, but it cannot compensate for overpaying for a generic villa.

Are short-term Koh Samui villa rentals becoming legally riskier?

Yes. Anyone buying a Koh Samui villa primarily for daily or weekly rentals should currently treat rental licensing as a separate risk from property ownership.

Thailand regulates short-stay accommodation through its hotel framework. Smaller accommodation businesses can fall within an exemption when they meet specific room and guest limits and complete the required notification process. Larger operations generally need the appropriate hotel authorization.

Recent Koh Samui enforcement shows that authorities are willing to look at this too.

In one nominee-related investigation, officials examined a luxury-villa operation where eight villas were reportedly being rented to tourists for around THB13,000 per night without the required hotel operating licence.

That example is useful because several risks collided in one business: foreign control, property ownership and short-term accommodation.

A projected 8% rental yield means very little until we know what kind of rentals are legally allowed, whether the operating permissions exist and who is actually responsible for them.

Are Koh Samui's water and electricity problems serious enough to affect villa buyers?

Yes. Koh Samui's water and electricity constraints are now serious enough that we would check them property by property rather than treating them as background island inconveniences.

Water is the more immediate example. The Provincial Waterworks Authority recently had to introduce emergency measures after another supply shortage affected Koh Samui. Officials said insufficient raw water was disrupting distribution and began increasing production, managing available supplies more aggressively and working on longer-term water-security measures.

The timing is important. This was not an old problem being recycled in a property brochure disclaimer. Authorities were still actively responding to shortages recently.

For property prices, the effect is likely to be uneven rather than island-wide. Villas with large storage tanks, reliable wells or private supply arrangements can absorb shortages much better than projects that depend entirely on weak local distribution. Over time, buyers may start paying more attention to that difference.

Electricity has a different profile. EGAT says Koh Samui depends heavily on submarine transmission from the mainland and has suffered from ageing infrastructure, voltage instability and rising demand.

A major upgrade is underway. EGAT's planned 230 kV submarine system includes two roughly 50-kilometre circuits from Khanom to Koh Samui, each capable of transferring around 200 MW. Together they should add up to 400 MW of transfer capability, which EGAT says would allow the system to handle demand several times higher than its existing capacity.

That makes the long-term electricity story fairly reassuring, but buyers still own the property before every infrastructure problem disappears.

At villa level, water tanks, pumps, backup power, drainage, electrical capacity and road access can therefore affect both the guest experience and resale value.

Infrastructure issue	What is happening now	Response underway	What we would check at the villa
Water supply	Recent shortages and emergency measures	Production and water-security work	Storage capacity and supply history
Electricity	Mainland dependence and ageing connections	New 230 kV submarine system	Backup power and electrical installation
Development growth	More demand on local networks	Capacity expansion	Local service reliability
Heavy rain	Drainage pressure on steep sites	Mostly site-specific	Drains, retaining walls and access

Are Koh Samui hillside villas and weak land titles riskier than they look?

Yes. Koh Samui hillside villas can combine title, access, engineering and construction risks in one property, so a spectacular sea view should never distract from what is actually registered and approved.

Steep sites around Chaweng Noi, Bo Phut, Lamai and other coastal hills can command serious premiums because uninterrupted views are genuinely scarce. But those properties also depend much more heavily on engineering and legal access than a flat plot.

We would verify whether the physical villa actually matches the approved construction plans, including pools, extensions and retaining structures. Drainage becomes especially important because tropical rain moving down a badly engineered slope can damage walls, roads and neighbouring property.

Access can be equally problematic. A road that has been used without conflict for ten years is reassuring, but it does not offer the same legal protection as a registered right of way.

The land document itself also needs close attention. A Chanote generally provides the strongest conventional title position because the parcel has formally surveyed boundaries registered through the Land Department. Other forms of land documentation can carry different levels of certainty and require more investigation.

Even a Chanote does not answer everything. The Land Office record should still be checked for the registered owner, mortgages, leases, servitudes and other encumbrances, while the surveyed boundaries should correspond with what actually exists on the ground.

Buyers also need to understand zoning, setbacks, height restrictions and any environmental rules applying to the site.

A properly engineered hillside villa with secure access, a strong title and an irreplaceable view can be one of Koh Samui's best assets. A weakly documented one can concentrate several serious problems in the same purchase.

Due-diligence check	Weak version	Better evidence	Possible problem
Land title	Seller says title is clean	Land Office verification	Ownership or encumbrance issue
Boundaries	Existing fence assumed correct	Survey matched to title	Encroachment
Road access	Informal permission	Registered servitude	Future access dispute
Villa construction	Building exists	Permit matched to actual structure	Resale or enforcement problem
Company ownership	Share register only	Funding and control checked	Nominee risk

Is buying an off-plan Koh Samui villa riskier now?

Yes. An off-plan Koh Samui villa adds developer and completion risk to an ownership environment that already requires more scrutiny than it did before.

With a finished villa, we can inspect the building, test utilities, look at drainage, verify access, compare the structure with permits and see what has already been built around it.

Off-plan buyers have to trust several things that do not yet exist.

The developer still has to control the land, keep financing the project, obtain the necessary permissions, finish the villa to an acceptable standard, complete common infrastructure and deliver whatever legal structure was promised when the buyer reserved.

Current enforcement makes the developer's own ownership structure especially important.

One of DSI's larger investigations involves a luxury development in Bo Phut where investigators are examining alleged nominee arrangements, land holdings, foreign funding and a network of related companies. DSI valued the company's 15 plots at roughly THB1.57 billion and said the wider project value could run into several billion baht.

That case does not make foreign-developed projects generally unsafe. It shows why the developer's corporate structure can no longer be treated as boring paperwork hidden behind the sales office.

Is it getting harder to resell a Koh Samui villa?

Yes, for ordinary villas. Koh Samui still has plenty of foreign buyers, but rising supply means resale is becoming much less forgiving when a property has no obvious reason to be chosen over newer alternatives.

C9 counted 117 primary-market projects and almost 2,900 developer units, while independent rental-villa inventory had already risen 34% in a year.

A resale owner therefore competes with a constant flow of new villas marketed with fresh furniture, new pools, instalment plans and professional renders.

That competition matters much less when the resale property owns something builders cannot easily reproduce.

A genuinely exceptional sea view, beachfront position, large mature plot, walking access to a desirable beach or outstanding architecture can maintain scarcity even while total villa supply grows.

Legal cleanliness will probably become part of that scarcity too. Future buyers are likely to ask harder questions before accepting an old Thai company whose shareholder history they do not understand.

Could tougher enforcement make the best Koh Samui villas worth more?

Yes. Cleaner Koh Samui villas could actually benefit from tougher enforcement because legal certainty is becoming a more valuable feature.

Take two comparable THB25 million villas.

One sits on land held through a company whose Thai shareholders contributed little money, has informal road access and depends on aggressive short-stay rental assumptions.

The other has a transparent land arrangement, clear building rights, registered access, matching permits and a rental setup that can be operated legally.

Those properties may once have looked surprisingly similar in a listing portal.

They should not trade at the same price when buyers are paying attention.

Current investigations are educating the market. Foreign purchasers now have concrete examples of companies being investigated over funding sources, nominee shareholders, land ownership and business activity.

Over time, that should make clean paperwork commercially valuable rather than merely reassuring.

Has the investment return on a Koh Samui villa become worse?

For an average rental villa, the risk-adjusted return has probably become somewhat worse because competition has increased faster than nightly pricing.

The clearest evidence comes from C9's rental data. Independent villa supply jumped 34%, occupancy climbed from roughly 65.8% to 71.5%, but average rates fell 11%.

As seen above, combining those figures suggests that revenue per available villa-night actually slipped by roughly 3% despite much higher occupancy.

Gross-yield advertisements also leave out a long list of costs: management, booking commissions, cleaning, staff, electricity, pool maintenance, gardening, repairs, replacements, insurance, taxes and empty periods.

Capital appreciation has partly offset that pressure. Colliers still expects prime villas, particularly sea-view and beachfront properties, to outperform ordinary stock.

The easiest version of the Koh Samui investment thesis has weakened. Buying almost any attractive pool villa and expecting tourism growth to lift both rent and resale value is getting harder.

Which Koh Samui villas are the riskiest buys today?

The riskiest Koh Samui villas today are properties where several individually manageable problems have been stacked together.

A typical high-risk combination would be a foreign buyer using a questionable Thai company to acquire a hillside plot, with informal road access, major changes from the approved plans, dependence on nightly rentals, weak water storage and a developer projecting very high occupancy.

Any one of those issues might have a solution.

Putting all of them into the same THB20 million or THB30 million purchase leaves almost no room for mistakes.

We would feel very differently about a villa with a defensible land structure, clear title history, registered access, matching permits, reliable utilities and a location whose appeal does not depend on another developer failing to build something similar next door.

One sales argument deserves particular scepticism now: “everyone in Samui does it.”

Villa characteristic	Lower-risk version	Higher-risk version
Land arrangement	Transparent and independently checked	Nominee-style company
Title	Strong and verified	Unclear or poorly checked
Access	Registered	Informal
Construction	Matches permits	Material unapproved changes
Rental plan	Works under conservative assumptions	Depends on aggressive nightly rentals
Utilities	Storage and backup built in	Fully dependent on unreliable supply
Location	Difficult to replicate	Large competing pipeline nearby

So is buying a villa in Koh Samui riskier now?

Yes. Buying a villa in Koh Samui has become meaningfully riskier, although most of the extra risk sits in weak properties and weak ownership structures rather than in Koh Samui's underlying appeal.

The legal change is the hardest to ignore. Authorities have moved from general warnings about nominees to a systematic investigation of thousands of companies, followed by raids, asset tracing and dozens of cases. The latest operation involves 60 cases, 88 suspects and roughly THB1.5 billion of land and buildings.

The investment side has also become tougher. Independent villa supply jumped 34%, nightly rates fell 11%, and the island continues adding residential inventory. Water shortages have again required emergency action, while electricity infrastructure is only now receiving the major capacity upgrade needed for continued growth.

Yet the other half of the evidence remains strong. Tourism demand is holding up, occupancy has absorbed a remarkable amount of new rental supply, foreign buyers remain central to the villa market and prime sea-view and beachfront properties continue to show strong price performance.

We would be more selective buying in Koh Samui today, but we would not be less interested in Koh Samui itself.

A legally clean villa with secure access, proper permits, reliable infrastructure and something genuinely difficult to replicate can still be a strong asset. The danger is paying a premium price for a villa whose economics depend on optimistic rental assumptions or whose supposed ownership security comes from Thai shareholders nobody expects to behave like real shareholders.

Koh Samui is still investable today. Buyers simply have far less room to get the details wrong.

Fact-checked and reviewed by our local expert

✓✓✓

Daniel Rouquette 🇫🇷

CEO & Co-Founder at Villa Finder

Daniel Rouquette understands the Koh Samui real estate market well, as he is in daily contact with villa owners and industry professionals on the island. As the CEO and Co-Founder of Villa Finder, he has been running the company since 2012, offering a premium selection of villa rentals with personalized concierge services. With over 4,000 villas in 28 destinations, Villa Finder is a key player in the luxury vacation rental industry.

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