Boundary removal project (BRP) aims to eliminate barriers between two sites and activate the grey residual space in-between. School campus in Taiwan is often surrounded by walls, which blocks its connection to communities and often creates security concerns. School campus has become the most popular target for BRP, which tries to turn it into a functional and aesthetic space. This study intends to explore the impact of campus BRP within a community, especially its relationships with neighborhood safety, perceived change and place attachment. The result shows that the improvement of boundary environment has a significant impact on all three perceptions.