Abstract: In this paper, HomeCAD, an experimental modelling system is introduced. It is based on G. W. 0520 C-H and contains the procedures for generating and evaluating the schemes of suites of houses. Its major aspect is in design analysis and its minor aspect is in design synthesis. Both these aspects are commonly related to the problem of optimization in computer-aided residence design and in many designs of other CAE fields. This paper provides a possible solution to this problem.