This paper aims at making the performance-oriented bulk control system for securing the daylight access to the possible adjacent buildings. In the previous paper, we proposed the idea of the "Imaginary Walls" to assess the impact of newly developed building and other buildings on the skylight access to each adjacent building. In this study, we developed the quantitative evaluation method for the impact of combined disturbing of daylighting caused by each of the "Imaginary Walls" and generated building envelopes. Next, we verified which is more effective the "height-fixed Imaginary Walls"or "height-synchronized Imaginary Walls" as a method of consideration to the combined disturbing of daylighting caused by newly developed building envelops using developed evaluation method. As a result, we confirmed that the "height-synchronized Imaginary walls" is effective for evaluation method of the impact of newly developed buildings.
