This study aims at evaluating sunlight and skylight access to the ground around high-rise buildings and on their external walls. The key features obtained are as follows: 1. The sky factor is an effective alternative index for evaluating the illuminance under cloudy condition in this model. 2. The maximum difference between relative solar energy and relative sunshine duration is obtained at measurements set around the intersection and near the wall, and the minimum difference is obtained at the midpoint between intersections. 3. The corner dwelling unit receives average solar energy of those received by the adjacent dwelling units on both sides.
