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Buying property in Koh Samui, ThailandOn Koh Samui, a rental villa stood empty more than four nights in ten.

Koh Samui has 3,055 rental villas, and across 2024 they were occupied 56.6% of the time. Most new homes for sale sit in one corner of the island, Bo Phut. Test any promised rental income against those numbers, and check the slope and the shoreline before the view.

4-minute read · checked 9 October 2026

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Average occupancy of rental villas across 2024
56.6%
C9 Hotelworks, June 2025 report
Rental villas on the island in 2025
3,055
C9 Hotelworks, June 2025 report
Median asking price of a developer condominium, per square metre
THB 88,500
C9 Hotelworks survey, June 2025
Share of new developer homes for sale that are in Bo Phut
70%
C9 Hotelworks survey, June 2025

Koh Samui property market: prices and supplySeven in ten new homes for sale are in Bo Phut.

What this means for youTreat these as asking prices from mid-2025, not sale prices. Ask whether a quoted price per square metre counts balconies and shared areas.

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C9 Hotelworks, an independent analyst, counted 2,882 developer-owned homes for sale in 117 projects in June 2025: 1,513 condominiums (apartments owned unit by unit) and 1,369 houses and villas.

2,030 of them, in 66 projects, were in Bo Phut, which C9 describes as including Chaweng Beach and the area around the airport. A buyer there has the widest choice, and the most competing sellers at resale.

The median asking price for a condominium was THB 88,500 per square metre. A one-bedroom unit of 40 to 70 square metres had a median price of THB 3.5 million and a two-bedroom of 80 to 110 square metres THB 7.2 million. The survey does not say whether these homes sold, or how the area was measured.

From: C9 Hotelworks, June 2025 survey. An independent consultancy, not a government figure.

Renting out a villa on Koh Samui3,055 rental villas compete for the same guests.

What this means for youBuild your budget on the full-year occupancy, not the best three months. Ask for the licence or registration that makes nightly lets lawful.

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C9 Hotelworks recorded 3,055 rental villas on the island in 2025. Their occupancy averaged 56.6% across 2024 and reached 71.5% in January to March 2025, when nightly base rates averaged THB 13,012 before taxes and extra fees.

Lawyers report that paid short stays ordinarily need a hotel licence or a valid registration as small accommodation, and not every property qualifies. A condominium's own management rules may restrict short stays as well.

These are reported averages for the whole island. We hold no verified rents, management fees or running costs for comparable homes, so income after costs cannot be confirmed.

From: C9 Hotelworks, June 2025 report; FRANK Legal & Tax

Koh Samui landslide, storm and flood riskThree natural hazards are rated high for the island.

What this means for youFor a hillside or beachfront plot, get the planning department's written confirmation of permitted use, and ask how the 2025 environmental notice applies to it.

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ThinkHazard, the World Bank's hazard screening tool, rates coastal flooding, landslides and cyclones (severe tropical storms) as High for Ko Samui district. Extreme heat is rated Medium. The ratings cover the district, not an individual plot.

An environmental protection notice for the area took effect on 22 May 2025 and runs for five years. The planning department gives written confirmation of what a plot may be used for; its online land-use lookup is not that confirmation.

From: GFDRR / World Bank (ThinkHazard); Office of Natural Resources and Environmental Policy and Planning; Department of Public Works and Town & Country Planning

Living on Koh Samui: schools, hospitals and weatherThe heaviest rain comes from October to December.

What this means for youSee the property between October and December if you can. With landslides rated high, that is when a slope and its drainage are tested.

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Rain at the Ko Samui weather station peaks in November at 489.6 mm, with 290.2 mm in October and 209.1 mm in December. February to April is the driest period, at 58 to 78 mm a month. Daytime highs run from 29.0°C in January to 32.6°C in May.

The island has its own airport, in Bo Phut, and two hospitals in our records: the state Koh Samui Hospital in Ang Thong, and Bangkok Hospital Samui.

International School of Samui, in Bo Phut, says it teaches a British course from primary to sixth form (pre-university study). It quotes yearly fees for 2026/27 of THB 504,586 for the youngest classes and THB 602,618 for Years 7 to 9, plus a THB 75,000 joining fee.

From: World Meteorological Organization, World Weather Information Service; Ministry of Public Health; Samui International Airport; International School of Samui; Bangkok Hospital Samui

Transfer fees and property tax on Koh SamuiThe transfer fee discount is for Thai buyers only.

What this means for youBudget for the full transfer fee and agree in the contract who pays it. Ask the seller for the latest yearly land and building tax bill.

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Government guidance states that registering a sale of land or a condominium costs 2% of the official appraised value, before any concession.

The reduced fee of 0.01% runs from 1 July 2026 to 30 June 2027 and applies to Thai nationals buying eligible homes where both the price and the appraised value are THB 7,000,000 or less.

The local municipality collects the yearly land and building tax. Whoever owns the property on 1 January is liable for that year.

From: Thailand.go.th; Department of Lands; Fiscal Policy Office

Questions buyers ask

Buying property in Koh Samui: short answers.

How much does a condo cost on Koh Samui?

C9 Hotelworks reported a median asking price of THB 88,500 per square metre for developer condominiums in June 2025, and THB 3.5 million for a one-bedroom unit of 40 to 70 square metres. These are asking prices, not completed sales.

Is a rental villa on Koh Samui a good investment?

It depends on occupancy. C9 Hotelworks reported that the island's rental villas were occupied 56.6% of the time across 2024, rising to 71.5% in January to March 2025, with 3,055 villas competing in 2025. Income after costs is not something we hold.

Can I rent out my Koh Samui villa for short stays?

Not as of right. FRANK Legal & Tax reports that short stays ordinarily need a hotel licence or a valid small-accommodation registration, subject to eligibility.

Where are most new homes for sale on Koh Samui?

In Bo Phut. C9 Hotelworks placed 2,030 of the 2,882 developer homes it surveyed in June 2025 there, in an area it describes as including Chaweng Beach and the airport surroundings.

When is the rainy season on Koh Samui?

October to December. The Ko Samui weather station averages 489.6 mm of rain in November, 290.2 mm in October and 209.1 mm in December, according to figures published by the World Meteorological Organization. February to April is driest.

Is Koh Samui at risk of landslides and flooding?

Yes, on a district-wide rating. ThinkHazard, published by the World Bank's disaster risk facility, classifies landslides, coastal flooding and cyclones as High for Ko Samui district.

The areas

Choose an area, and see what is being built there.

In the developers’ own words, as they publish them. NITARYA checks a project only inside Acquire & Own, for the client who chooses it, and every project here stands on the same footing.

Chaweng

See how these areas compare on price, rent and running costFree. Every figure there carries its source and date.

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The evidence

What this guide rests on.

The full rules, step by step: ownership guide for Thailand and the tax guide.

Every sourced fact we hold on Koh Samui (18)
  • The boundary covers Ko Samui District in Surat Thani Province.
  • International School of Samui is in Bo Phut.
  • Bangkok Hospital Samui lists its address at 57 Moo 3, Thaweerat Phakdee Road.
  • Thai Meteorological Department normals for the Ko Samui station show mean monthly rainfall peaking in November at 489.6 mm, with 290.2 mm in October and 209.1 mm in December; the averaging period is not stated.
  • Koh Samui Hospital, the Ministry of Public Health hospital for the district, is at 61 Moo 1, Ang Thong subdistrict, Ko Samui District.
  • Lomprayah’s 2026 timetable links Samui, Phangan and Tao within its Gulf of Thailand ferry network.
  • Samui Airport lists car-rental and limousine services for arriving passengers.
  • Samui International Airport, managed by Bangkok Airport Management Company Limited, is at 99 Moo 4, Bo Phut subdistrict.
  • The district contains seven subdistricts, including Bo Phut, Maret and Mae Nam.
  • The school offers British education through primary, senior school and sixth form (pre-university study).
  • International School of Samui quotes annual Reception–Year 2 fees of THB 504,586 for 2026/27.
  • Its annual Years 7–9 fee is THB 602,618 for 2026/27.
  • Those school fees include lunch, prescribed textbooks, teaching materials and on-campus accident insurance.
  • The school’s standard joining fee is THB 75,000 per child, subject to published exceptions.
  • It also requires a THB 75,000 security deposit, refundable subject to notice and withdrawal terms.
  • February to April is the driest period at the station, with mean monthly rainfall of 57.8 mm, 77.8 mm and 76.6 mm; May to September each average between 112.7 mm and 146.5 mm.
  • Mean daily maximum temperature at the station ranges from 29.0 °C in January to 32.6 °C in May, and mean daily minimum from 23.9 °C in December to 26.1 °C in April.
  • The airport advertises shared songthaew transport (passenger pickup trucks) to destinations around the island.

Office of Natural Resources and Environmental Policy and Planning · International School of Samui · Bangkok Hospital Samui · World Meteorological Organization, World Weather Information Service · Department of Thai Traditional and Alternative Medicine, Ministry of Public Health · Lomprayah · Samui Airport · Samui International Airport, checked 25 September 2026

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Last checked 9 October 2026. This guide is general: what applies to you depends on your nationality, where you pay tax and the property itself.

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