Building materials such as concrete aggregate used in Tokyo district have recently been transported by ship or truck over a long distance with a long transportation time. Therefore, the evaluation of environmental impact from the total amount of building materials and $CO_2$ emissions due to transport of these materials from outside raw material plants to construction sites in the Tokyo district will become an important issue. In this study, the present conditions of transportation loads from building materials for structural bodies such as concrete, its aggregate and so on in the feasiblility study were investigated in consideration of transportation distance (km), total amount of weight (ton) and total number of transportation times (times) from raw material plants to construction sites in the Tokyo district. The environmental impacts of these transportation loads from building materials such as concrete aggregate conveyed into the Tokyo district were evaluated by the indicators of ton-kilometerage ($t{cdot}km$) and amount of $CO_2$ emissions (t-$CO_2$), comparing transportation by ship and by truck. Moreover, regarding actual buildings recently built in Tokyo, a comparative analysis was conducted in terms of environmental impacts due to transportation loads from ton-kilometerange ($t{cdot}km$) and amount of $CO_2$ emissions (t-$CO_2$) in consideration of differences between structural body types of reinforced concrete and structure steel.