The scarcity of land and the lack of communal sanitation in slum areas are common issues in densely populated country like Indonesia. One of them happens in Kampung Nambo, located in South Tangerang City, Banten Province. Those issues encourage some household to build their houses without an adequate sewage disposal system within a very limited land. Wastewater flows directly to the river without any treatment process and it creates negative impact to the environment and human life. Moreover, this kampung also does not have educational and recreational parks facilities, which can fulfil human’s need to socialize and health. The method used in this study is an action-based research. Addressing the problem of scarcity of land and the need for WWTP facilities, the complementary facilities offered are hydroponic farming, workshop venue, playgrounds, reading park, sports facilities that are integrated with the proposed WWTP area. Generally, the WWTP areas often placed in the backside and were not utilized optimally. Meanwhile this study accommodates the WWTP towards integrated and multifunction facility. It is not only to fulfil the needs of education and recreation parks for the community, but also to preserve the location for WWTP extension in the future.