Buying property in Bang Rak, Koh Samui, ThailandIn Bang Rak, an unlicensed nightly let is a crime, not a grey area.

Letting a property for less than 30 days at a time can be treated as a hotel business under Thailand's Hotel Act, which normally requires a hotel licence. A simpler registration exists only for premises with no more than 8 guest rooms and no more than 30 guests at a time.

Running an unlicensed hotel is a criminal offence. The penalty is up to one year in prison, a first fine of THB 20,000 and a further THB 10,000 for each day the offence continues.

The demand figures held are for Koh Samui as a whole, not for Bang Rak. C9 Hotelworks, an independent analyst, reports that rental villas were 76.2% full in February 2024 and 38.7% full in September, against 56.6% across the year. It counted 3,055 rental villas on the island in 2025.

From: FRANK Legal & Tax; C9 Hotelworks

An environmental protection notice for Surat Thani province took effect on 22 May 2025 for five years. It covers Bo Phut subdistrict, which contains Bang Rak.

The law firm Lex Bangkok reports that on land below 80 metres above sea level, a hotel or apartment building within 50 metres of the shoreline needs a full environmental impact assessment, whatever its size. Further from the shore the assessment is needed at 80 or more rooms, or 4,000 or more square metres.

Lex Bangkok reports that the notice sets separate zones for land at 80 to 140 metres and above 140 metres, where a building may be no taller than 6 metres. The zoning and coastal setbacks (the distance a building must keep from the shore) of individual plots in Bang Rak have not been verified.

From: Office of Natural Resources and Environmental Policy and Planning; Lex Bangkok (law firm's reading of the notice)

ThinkHazard, published by GFDRR and the World Bank, rates coastal flooding for Ko Samui District as High. That means potentially damaging waves are expected to flood the coast at least once in the next 10 years. The rating covers the district, not Bang Rak alone.

It also rates landslide and cyclone hazard as High. Tsunami and urban flood are rated Low, and river flood Very low.

This area is the Bang Rak Bay beachfront and the neighbourhood around the beach and airport approach road. Noise from the airport approach and drainage around the bay have not been measured.

From: GFDRR / World Bank, ThinkHazard

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 57.8 to 77.8 mm a month. Average daytime highs run from 29.0 °C in January to 32.6 °C in May.

Samui International Airport is in Bo Phut subdistrict, the same subdistrict as Bang Rak. Its arrivals area lists local public buses, taxis, transfer services and car-rental counters.

The district's state hospital, Koh Samui Hospital, is in Ang Thong subdistrict. The state schools that serve Bang Rak are not recorded.

From: World Meteorological Organization; Samui International Airport; Ministry of Public Health

These figures are for Koh Samui as a whole, not for Bang Rak. C9 Hotelworks surveyed 2,882 developer-owned homes for sale across 117 projects in June 2025: 1,513 apartments and 1,369 houses and villas.

It placed 2,030 of them, in 66 projects, in its Bo Phut area, which it describes as including Chaweng Beach and the land around the airport. That is 70% of the island's new homes on offer. C9 gives no figure for Bang Rak alone.

The median (middle) asking price of an apartment was THB 88,500 a square metre, and THB 3.5 million for a one-bedroom apartment of 40 to 70 square metres. These are prices offered by developers, not confirmed sale prices.

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