Abstract
The expenses and the items of expenditure of exterior wall diagnosis were investigated about the building assumed for expense examination. Expense was estimated for the case where test hammer inspection or an infrared thermography inspection is used. As a result, it turned out that expense of temporary works expense forms about 30% of aggregate total costs (average), and the degradation grade is one of the factors which influence the working efficiency of investigation diagnosis. As others, the point which should be checked when a building owner requests diagnosis from an outer wall diagnostic contractor became clear.