Abstract
This Research has been conducted as a part of the Research on the Development of Green Vertical Urban City. A series of preceding research for the development of a Space Efficiency Analysis Program has been conducted, and this research is focused on the actual application and evaluation with the case study. L-Tower project is selected since it has had numerous conceptual design studies for the final design selection process. Since different forms of the tower have been studied based on the same quantitative space requirement and evaluated only based on their aesthetic point view, this project offers a good opportunity to evaluate the alternatives in quantitative analysis. The results of the analysis are summarized in three categories. The first is the comparison of space efficiency ratio of each alternatives based on the shape of the typical floor plan. The second is the planning issues based on the first result. And the third is the conversion of the efficiency rate into the financial implication to give clearer understanding of the comparative study and the results to the decision-makers of the project.