Koh Samui Building Regulations
Koh Samui Building Regulations according to the distance from the beach
Before building any property you need to hold a building permit which is obtained from the municipality office. There are certain restrictions on the structure that you can build depending on the distance of your property from the beach.
There are four defined areas in the Koh Samui Building Regulations which are:
Area 1 – For land located up to 10 meters from the beach, no construction is permitted.
Area 2 – For land located up to 50 meters from the beach, you can only construct a single storey building with a maximum height of 6 meters (including the roof). Also, each building cannot exceed an area of 75 square meters.
Area 3 – For land located up to 200 meters from the beach, the maximum height allowed for any building is 12 meters (including the roof). Also, each building cannot exceed an area of 2,000 square meters.
Area 4 – For land located more than 200 meters from the beach, the maximum height allowed for any building is 12 meters.
Note: Property must now also be constructed with peaked roofs; flat roofs are no longer permitted.
Koh Samui Environmental Regulations According To Distances Above Sea Level
Level 1 – Land less than 80 meters above sea level
In general, no extra rules apply here, subject to rules relating to hotels (50 percent of hotel land area must be left unbuilt on and ‘green’), residential projects consisting of 10+ units (must have water and waste treatment facilities), in addition to water dams, golf courses and airports.
Level 2 – Land between 80 and 140 meters above sea level
At this level, a single family home can be constructed on land that is 100 square wah or greater (if the land is less than 100 square wah, construction is prohibited). Structures cannot exceed 6 meters in height and must leave 50 percent of the land unbuilt on and ‘green’; must have an architectural design based on traditional Thai, tropical or local aesthetics; must have a roof consisting of 80 percent of the total building area that matches the natural surroundings; and must include an approved water drainage system, to prevent flooding.
Level 3 – Land greater than 140 meters above sea level
Within this range, the rules for Level 2 apply and also structures cannot exceed 90 square meters.
Koh Samui Environmental Regulations According To Gradient of Land
In all the levels above, where the slope of the land is between 35-50 degrees, only a single family home is permitted which cannot exceed 80 square meters in area and which must leave 75 percent of the land unbuilt (50 percent of the unbuilt land area must be ‘green’ with native trees). In addition, the land area must be 120 square wah or greater, otherwise construction is prohibited. For any slope greater than 50 degrees, construction is also prohibited.