Recently many new detached wooden houses are produced using pre-cut processing( described later). In order to evaluate the structural performance of a wooden house, information on the frame and design information on the joints are required. This information is created as three-dimensional information in CAD (Computer Aided Design) data for pre-cut processing and has an extremely high affinity for structural analysis. At present two-story wooden houses are just only required to calculate the amount of wall. However, if three-dimensional information at the time of pre-cutting can be utilized in structural design, it is possible to produce wooden houses with structurally more structural safety. We focus on the CAD information for wooden houses and introduce the contents of the research which examined the method to cooperate with the structural performance evaluation.