Rumah susun (pemukiman vertikal) adalah solusi untuk meningkatkan kualitas lingkungan bagi penghuni pemukiman kumuh, namun penelitian terdahulu mengindikasikan melemahnya interaksi sosial penghuni rumah susun. Penclitian lni dilaksanakan di rumah susun Cinta Kasih yang dikelola Yayasan Buddha Tzu Chi Indonesia dengan metode survei pada bulan November-Desember 2010. terdapat 79 responden dan 16 informan. Dldapat hubungan semaldn tinggi lantai semakin sedikit jumlah kegiatan sosial yang diikuti oleh penghuni, terutama pada penghuni perempuan. Angka koefisien korelasi adalah 0,267 (seluruh penghuni) dan 0,335 (penghuni perempuan). Disimpulkan bahwa fisik bangunan rumah susun Cinta Kasih dengan 5 tingkat lantai tidak menghambat penghuni dalam membangun interaksi sosial.

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Flats or can be called with vertical settlement is a solution to increase the environment quality for slum dwellers, however previous research shows that flats has caused the decrease of social interaction between occupants. This research was conducted at flat of Cinta Kasih that managed by Buddha Tzu Chi Indonesia foundation, in November until December 2010. In getting data, researcher was used survey methode, there were 79 repondents and 16 informants who are involved in it. Relations obtained that the higher floors the less amount of social activity which is followed by occupants, especially in female occupants. Correlation coefficient were 0.267 (for all occupants) and 0.335 (for female occupants). Concluded that the physical building of Cinta Kasih' flats with 5 levels of floor, does not hamper social interaction between occupants.