A Study on the Decarbonization in Small Scale Building District

Abstract

To achieve decarbonization by 2050, the Japanese government is calling for improved energy performance in new buildings. In particular, the central Tokyo area has a high concentration of aging small-sized buildings, which need to be reconstructed or renovated to improve the efficiency of their energy use. However, building owners are faced with the high cost of ZEB and energy efficient renovations. Therefore, there is a need to implement reconstruction or renovation at an appropriate time, and to improve business feasibility by providing incentives. The purpose of this study is to clarify how environmental measures should be introduced and how business schemes should be constructed to achieve decarbonization. As a result, it is clear that early reconstruction and energy-saving retrofitting will improve the environmental performance of the district, and that it is possible to introduce environmental measures that ensure business feasibility by utilizing the revenue from the proposed deregulation of floor area ratio.