Tonle Sap is Cambodias largest freshwater lake in Southeast Asia.The lakes plentiful supply of fish attracts human settlement in the form of fishing folk on living their boats in floating communities, as well as people living in permanent stilt houses built on land.To earn a living and maintains a stable environment, the settlement of high stilt houses situated is in specific location between land and water.This paper focuses on the high stilts community, the case study in Kampong Phluk community, where people adapt to living in extreme seasonal water level changes in Tonle Sap Lake.Houses should be built as near to the lake as possible but should be protected from damage by seasonal floods.Therefore,long timber poles are used as stilts to lift the house up off the ground.Each house is built in the shape of narrow rectangular plan.Houses are located close to one another along opposite sides of the riven channel.As a result, the layout is narrow and expansion is deep rather than wide.In addition, the settlement is located in a large plain so a high proportion of houses have a roof of less than 45 degrees to reduce the impact of wind.The main structure of house on high stilt has a post-beam system combined with structural bracing system making a three-dimensional distributed load to support and strengthen the structure during the flood season.Periodically water from the Mekong overflows into the Tonle Sap basin.Because the water rises slowly, the high stilt houses are able to remain undamaged.