In this study, we aim to clarify the design method of ‘fixed infill’, as the role of a guide for ‘variable infill’, which is effective in order to realize diversity of space structure, through the trial design study on the remodeling experiment of a dwelling in NEXT21. The results are as follows: 1)We clarified the effectiveness of the method that ‘fixed infill’ is divided into several blocks and the method that ‘fixed infill’ is installed separating from a cladding wall. 2)We clarified the effectiveness of the method to change only functions of ‘fixed infill’. By using this method, it was possible to realize the same space structure realized by using the method to change forms and functions of ‘fixed infill’.
