Is Koh Samui property becoming overbuilt?

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Why does Koh Samui suddenly feel so overbuilt?

Koh Samui feels much more built-up today because developers have moved from small villa projects into a much bigger construction cycle, including projects with hundreds of units.

C9 Hotelworks counted 2,882 homes for sale directly from developers across 117 projects, worth about THB30.3 billion. Around 52% were condominiums and 48% landed homes. That mix shows how much Samui has changed. The island built its property reputation around low-density villas, while new supply now includes much larger apartment developments.

The clearest examples are ANAVA Samui, with 564 units, and Wing Samui, with 533. Those two projects alone contain 1,097 homes. That is equivalent to roughly 38% of all the primary-market units C9 counted across the island.

The villa side has been growing quickly too. Colliers' latest full residential review says villa supply increased 34% year on year, while earlier reporting on launches showed Samui heading toward its busiest villa-development year in roughly 15 years.

And this development wave is still moving. ANAVA was publishing new construction updates as recently as late August, after updates throughout the year. We are no longer talking about projects that exist mainly in brochures. A large part of the next supply wave is physically being built now.

That is why Samui looks different on the ground. Development has become larger, denser and much harder to ignore.

Measure	Scale	What it tells us	Why it stands out
Primary residential supply	2,882 units	Large active development market	Spread across 117 projects
Primary-market value	THB30.3B	Serious capital committed	Far beyond a small villa niche
ANAVA Samui	564 units	Large condo format	Still actively under construction
Wing Samui	533 units	Another large condo project	Adds to the same new supply cycle
ANAVA + Wing	1,097 units	Huge concentration in two projects	~38% of C9's entire primary-market count

Is Koh Samui actually oversupplied already?

Koh Samui is already showing oversupply in parts of the rental market, although the evidence is still too uneven to call the whole island oversupplied.

The strongest proof comes from independent villas. According to C9 Hotelworks, rental-villa supply increased 34% year on year and reached about 3,055 properties. Occupancy still climbed by 5.7 percentage points to 71.5%, which sounds excellent at first.

Prices tell the other half of the story.

Average nightly rates dropped 11% to THB13,012 during the same comparison period. C9 explicitly linked the fall to stronger competition from the extra inventory.

We can push that analysis one step further. An 11% decline implies an earlier nightly rate of roughly THB14,620, while the 5.7-point occupancy gain implies earlier occupancy of about 65.8%. Multiplying rate by occupancy gives a rough revenue-per-available-night figure of about THB9,620 before the supply surge and THB9,304 afterward.

So revenue per available villa-night fell about 3%.

Owners filled more nights, but the market needed lower prices to do it.

That is already an oversupply symptom. We stop short of calling Samui broadly overbuilt because the market still achieved 71.5% occupancy. Guests have not disappeared. Competition has simply become much harder.

Rental-villa measure	Earlier level	Later level	Change
Supply	~2,280 implied	3,055	+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%

Is Koh Samui tourism growing fast enough to absorb all this property?

Koh Samui tourism is growing strongly, but demand has not been growing fast enough to stop new rental supply from pushing prices down.

Samui's property boom does have real tourism behind it. Airport traffic exceeded its pre-pandemic level, European demand remained strong, and Samui continued attracting affluent travellers who are natural customers for private villas.

Samui Airport handled roughly 2.78 million passengers in 2024, around 21% more than the previous year and above the approximately 2.42 million recorded in 2019. During the first four months of the following year, traffic was running another 9% higher year on year.

Bangkok Airways has also been working on expanding Samui Airport's capacity, with plans previously discussed to increase daily flight movements from around 50 toward 73 alongside terminal improvements. That gives the island more room to keep growing.

But property supply has been moving even faster in some areas.

Independent villa inventory jumped 34% in one year. As seen above, occupancy rose, yet average nightly prices still fell 11%.

Samui can keep breaking tourism records while individual villa owners make less money than expected because the number of competing properties is rising even faster.

Stronger tourism can absorb a lot of construction. It cannot make unlimited construction profitable.

Are too many Koh Samui villas being built now?

Koh Samui is probably building too many ordinary investment villas now, especially when several projects offer almost the same product in the same price range.

Villa construction itself is not the problem. The risk comes from repetition.

Across Samui, developers keep producing variations of the same proposition: two or three bedrooms, private pool, modern tropical design, small plot, somewhere between the beach and the hills, marketed partly around rental yield.

A buyer searching today can see how crowded that proposition has become. DDproperty currently shows more than 1,400 Koh Samui villa listings under a broad island search. FazWaz shows close to 500 villas in Bo Phut alone. Lazudi has more than 300 Bo Phut villas in its current catalogue.

Those portal totals contain overlap because the same property can appear through several agents, so we should never treat them as 1,400 unique villas. What they do show very clearly is how much choice a buyer has.

Current asking prices also stretch across a huge range. Fresh Bo Phut listings include new or recent two- and three-bedroom pool villas around THB7 million to THB13 million, while sea-view properties can quickly move above THB20 million or THB30 million.

That creates brutal competition for developers whose property has nothing unusual about it.

A well-located villa with a protected view can still be hard to replace. A generic three-bedroom pool villa several minutes inland can now have dozens of close substitutes.

This is where Samui looks most overbuilt today.

Are Koh Samui condos becoming an even bigger oversupply risk?

Koh Samui condos could become the island's biggest oversupply problem because the next projects are arriving at a scale Samui has barely tested before.

ANAVA is the obvious example. The project contains 564 units across 13 low-rise buildings near Bang Rak. Its developer continued publishing construction progress throughout 2026, including new updates in late August, and current sales platforms still show the development under construction with completion expected around 2027.

Wing Samui adds another 533 units.

Together, ANAVA and Wing contain 1,097 homes. C9's market study counted roughly 1,513 condominium units in Samui's primary supply. The two projects therefore equal around 72% of that number.

That does not mean 72% extra supply will suddenly hit the market on one morning. Construction, sales and completions are staggered. Some units will also be used as second homes rather than rentals.

Still, the order of magnitude is hard to dismiss.

Samui has historically absorbed small projects one at a time. Hundreds of similar apartments arriving through a few large developments create a different market. Owners will eventually compete with each other for holiday guests, long-term tenants and resale buyers.

There is also a reason developers like condos. Foreign buyers can directly own qualifying condominium freehold units within the legal foreign quota, which makes the product easier to understand than villa-land structures.

That could unlock a bigger buyer pool.

The open question is whether that pool is big enough for repeated 500-unit developments.

Condo measure	Units	Comparison	What we should watch
C9 primary condo supply	~1,513	Current market base	Existing absorption
ANAVA	564	~37% of that base	Construction and eventual resales
Wing Samui	533	~35% of that base	Sales and rental entry
ANAVA + Wing	1,097	~72% of that base	Whether Samui can absorb this scale repeatedly

Is Bophut becoming too crowded with new property?

Bophut is becoming crowded, but buyers are still rewarding the area enough that we cannot call it a failed development market.

About 2,030 of the 2,882 primary-market units counted by C9 were in the wider Bo Phut submarket. That is around 70% of Samui's active developer inventory.

There is a straightforward reason. The wider Bophut area gives buyers access to Fisherman's Village, Bang Rak, Chaweng, Choeng Mon and the airport. Those are exactly the places where tourists, expats and second-home owners usually want to spend time.

Demand has therefore been much deeper than in several outer areas.

Current asking prices still reflect that premium. A Five Stars Thailand analysis of 221 current villa and house listings put the median Bophut and Fisherman's Village asking price at around THB76,190 per square metre, compared with roughly THB57,500 in Mae Nam and THB57,100 in Lamai. Chaweng Noi was higher again at around THB79,300.

But concentration eventually becomes its own problem.

FazWaz currently shows roughly 492 Bo Phut villas for sale, while Lazudi shows just over 300. Duplicate listings make the raw numbers imperfect, yet both portals independently show a very deep pool of competing property.

Bophut currently has the strongest mix of demand and supply on Samui. That gives good projects some protection, while average projects increasingly have to fight for attention.

Is Mae Nam already showing what happens when Samui builds too many similar villas?

Mae Nam is one of the clearest places where Koh Samui's villa boom looks less convincing because cheaper land has encouraged a lot of similar development without Bophut-level demand.

Mae Nam still has plenty going for it. The beach is attractive, Fisherman's Village is accessible, and buyers can often get more house and land for their money.

Those lower land costs also make it easier to keep adding villas.

The problem becomes obvious when we look at current pricing. Five Stars Thailand's latest catalogue puts the median villa asking price in Mae Nam at roughly THB13.5 million and around THB57,500 per square metre. Lamai is almost identical. Bophut and Fisherman's Village are roughly one-third higher per square metre.

Current portals also show new Mae Nam pool villas around THB5.8 million to THB6.3 million, while many other developments compete in the THB7 million to THB15 million range.

That is a crowded middle.

Mae Nam therefore has less room for lazy development. A cheaper plot does not automatically create a good investment once ten nearby projects can offer a similar pool villa at a similar price.

The winners will increasingly be the properties with better access, design, views, build quality or pricing rather than simply the ones that manage to finish construction.

Are falling Koh Samui villa rates already hurting investment returns?

Yes. Falling Koh Samui villa rates are already squeezing investment returns even though occupancy has stayed surprisingly strong.

The key number is the 11% drop in average nightly rates reported by C9, alongside occupancy rising to 71.5%.

Revenue therefore held up much better than rates, but owners do not invest based only on occupancy. They care about what remains after management, electricity, maintenance, pool care, housekeeping, booking commissions, repairs and periods when the villa is unavailable.

Those costs have not fallen 11% simply because nightly prices have.

Current yield guides still advertise attractive headline numbers. A recent Samui market review puts gross prime-villa yields broadly around 6% to 12%, with net yields more commonly around 4.5% to 8% after costs. Individual property portals sometimes display even higher estimated ROIs.

We would be careful with those numbers today.

A villa bought on the assumption of permanently high pandemic-recovery rates can miss its expected return even while producing plenty of bookings. The owner does not need a tourism crash to get hurt. A 10% rate cut, higher competition and slightly more marketing spend can do plenty of damage.

That is why rental-rate compression deserves more attention than the attractive occupancy headline.

If Samui is overbuilding, why are expensive villas still selling?

Luxury Koh Samui property can keep doing well during an oversupply cycle because genuinely scarce villas compete in a much smaller market than ordinary pool villas.

Prime Samui property has several things developers cannot reproduce easily: absolute beachfront land, an unobstructed panoramic view, exceptional elevation, large plots near established neighbourhoods and legally clean projects in locations buyers already know.

Colliers' latest residential review remains positive on those assets. It estimates roughly 7.5% annual price growth in prime villa zones and around 8.5% for beachfront and sea-view properties through 2030.

Forecasts are forecasts, but the gap between current asking prices already shows how differently buyers value locations.

The latest Five Stars catalogue puts median asking prices around THB57,000 per square metre in Mae Nam and Lamai, roughly THB76,000 in Bophut and Fisherman's Village, and close to THB79,000 in Chaweng Noi. Truly exceptional villas can go far above those medians.

So a Samui building boom does not flatten every part of the market into the same outcome.

Developers can create another pool villa.

They cannot easily create another prime beachfront plot.

That is why luxury transactions can remain strong while ordinary investment villas start competing on price.

Is Koh Samui property too dependent on foreign buyers?

Koh Samui property is heavily dependent on foreign buyers, and that makes an oversupply cycle easier to trigger if international demand cools.

Colliers says foreigners account for most villa demand, with Australians and Europeans among the important buyer groups. Other market reporting also consistently shows Samui's resort developments relying heavily on overseas purchasers.

That works very well during a boom.

A French, British or Australian buyer can spend THB15 million on a holiday home even though local incomes could never support that price. Samui therefore has access to a much larger pool of wealth than its resident population suggests.

But second homes are easy purchases to delay.

Foreign buyers can choose Phuket, Bali, Dubai, Spain or simply keep their money invested elsewhere. They can also postpone buying for a year if Thailand's legal environment, currencies or property returns become less attractive.

Condos may widen Samui's foreign demand because qualifying units can be owned directly as freehold within the statutory foreign quota. Villas usually require more complex land and ownership arrangements.

Even so, hundreds of new condos and villas are ultimately competing for discretionary international capital.

Samui does not have a huge local owner-occupier population waiting to absorb whatever foreigners leave behind. That makes today's construction pipeline more sensitive to sentiment than a normal housing market.

Can Koh Samui's water, roads and infrastructure handle all this construction?

Koh Samui's infrastructure is already struggling enough that overbuilding can no longer be judged only by whether developers find buyers.

Water has become the hardest evidence to ignore.

The Provincial Waterworks Authority recently had to launch emergency measures after drought conditions affected water distribution on Samui. The authority reported average demand of around 34,000 cubic metres per day.

At the time, the mainland submarine pipeline was supplying around 20,000 cubic metres per day and local production had been pushed to roughly 7,500 cubic metres.

That gives about 27,500 cubic metres of available supply against 34,000 cubic metres of demand.

The gap is roughly 6,500 cubic metres per day, equivalent to around 19% of demand.

Authorities responded with measures that included rotational distribution and efforts to increase supply. More importantly for the property market, the PWA explicitly discussed longer-term water-security planning.

This was happening recently, while several large residential developments were still under construction.

That makes the infrastructure question much more concrete. Samui can theoretically sell another thousand homes while still lacking enough reliable public water for the people already there.

Private tanks, wells and tanker deliveries can patch the problem property by property. They do not solve the island-wide capacity gap.

Water measure	Approximate level	Difference
Reported average demand	34,000 m³/day	Baseline
Mainland pipeline contribution	20,000 m³/day	-14,000
Local production	7,500 m³/day	Adds partial capacity
Combined supply	27,500 m³/day	-6,500
Implied shortfall	6,500 m³/day	~19% of demand

Won't stricter building rules stop Koh Samui from being overbuilt?

Stricter Koh Samui building rules can slow environmental damage, but they cannot stop developers from oversupplying the parts of the island where construction remains legal.

Recent environmental rules have tightened controls across Samui, Koh Phangan and Koh Tao. They regulate issues such as coastal setbacks, building dimensions, hillside development, wastewater and construction in sensitive zones.

That should make some forms of development harder.

It also supports the value of genuinely scarce existing sites because developers cannot endlessly reproduce beachfront land or high-elevation projects.

But planning rules do not ask whether another 60 villas are commercially necessary.

If ten developers can legally build similar homes in the same neighbourhood, all ten can still proceed.

There is even a possibility that tighter restrictions increase concentration. Once the hardest coastal and hillside sites become difficult to develop, builders naturally compete for the remaining plots with easier permissions and infrastructure access.

Regulation may help Samui avoid uncontrolled physical development. Market oversupply can still happen well inside those limits.

What would prove that Koh Samui has really become overbuilt?

We would call Koh Samui clearly overbuilt once falling rental prices spread into weaker occupancy, slow project sales and visible resale pressure at the same time.

Right now, the evidence is one step short of that.

Villa rates have already weakened, but occupancy remained strong. Large condo projects are being built, but the biggest wave has not yet completed and entered the rental and resale markets. Hundreds of villas are listed for sale, but prime locations still command much higher prices.

The next stage would look different.

If villa occupancy starts falling while nightly rates remain weak, owners would lose both price and volume. If hundreds of recently completed condo units begin appearing for resale at once, we would finally see whether buyers bought them to hold or simply hoped to flip them. If developers start leaning heavily on discounts, guaranteed returns, furniture packages and extended payment terms, sales would be telling us more than launch announcements.

Current listings already give us a useful baseline. DDproperty's broad Samui villa search contains more than 1,400 listings, Lazudi shows over 300 in Bo Phut, and FazWaz shows close to 500 there. Again, these are overlapping portal inventories rather than a clean count of unique homes. The important thing to watch now is whether those numbers keep swelling while asking prices and transaction prices separate.

Infrastructure could provide the clearest warning of all. A recent water shortage already forced emergency intervention.

If new completions keep rising while the same constraints repeatedly return, Samui could become physically overdeveloped before its headline property prices ever crash.

So is Koh Samui property becoming overbuilt?

Yes, selectively. Koh Samui is becoming overbuilt in ordinary investment villas and is moving toward a much bigger oversupply test in condominiums.

The rental market gives us the strongest proof so far. Villa inventory expanded 34% in one year, and owners still managed to raise occupancy to 71.5%. But they had to accept an 11% lower average nightly rate. Our reconstruction puts revenue per available villa-night slightly lower despite the extra bookings.

Buyers should stop treating high Samui tourism as automatic protection against new competition.

Condos are the next problem to watch. ANAVA and Wing together contain 1,097 units, and ANAVA was still visibly progressing through construction as of its latest updates. Samui has very little history showing how a market of this size will behave once several hundred comparable apartments simultaneously enter rentals and resales.

Location is becoming more important too. Current asking prices differ sharply between Mae Nam, Lamai, Bophut and Chaweng Noi, while hundreds of competing villas are available in the most active areas. The days when simply building a modern pool villa on Samui created obvious scarcity are fading.

Then there is water. A recent shortfall of roughly 6,500 cubic metres per day forced the Provincial Waterworks Authority into emergency measures while more property was still being built. We should take that seriously. An island can keep recording sales long after development has started pushing past comfortable infrastructure capacity.

Prime property remains a different story. Beachfront land, protected sea views and the best northeastern locations still have genuine scarcity, and foreign demand remains capable of paying for it.

The answer is sharper than “Samui is booming” or “Samui is overbuilt.”

Samui currently has plenty of property, and it is adding more very quickly. The weaker, easier-to-copy parts of the market are already feeling that pressure. The best assets can still perform extremely well.

For buyers, that changes the question completely. Buying Samui is no longer enough.

The property itself now has to deserve being bought.

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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BAMBOOROUTES

A team specialized in real estate investing in APAC countries (Japan, Thailand, Indonesia, Australia, etc.).

We are a team of financial experts, legal professionals, developers, and local real estate specialists dedicated to helping people like you avoid mistakes when investing in real estate in a foreign place, particularly in Koh Samui. If you’d like to learn more about us, you can check our presentation page.