Abstract
Regarding a house renovation as a waste reduction method, amount of waste reduction, other environmental loads and cost were investigated in one renovation case. As a results, 1) about 30% waste reduction was obserbed, 2) not only waste but materials and energy input reduction were obserbed by 30% and 60% for each, 3) cost was also reduced. These redults mean that house renovation is not only waste reduction but materials and energy saving method, and that it could also reduce building cost.
