This study aims to retrofit facade of existing buildings that have not applied green building standards, specifically the value of OTTV (Overall Thermal Transfer Value) which is a mandatory point that must be owned according to SNI 6389:2011. This paper describes several retrofit options commonly used, such as Recladding, Over-Clading, Double Skin, and Replacement applied to the example of the case study of Menara Kadin, Jakarta. The respective components of the strategy are calculated OTTV by using the OTTV Calculator. The results show that the reclading strategy was not successfully applied to the case study building, on the other hand. Over-Clading strategies have been successfully applied to just a few sides. The double skin strategy is successfully applied to all sides, and replacement strategies can produce maximum results. The result of this study can be used as reference in planning retrofit facade in existing building.
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