In the field of housing construction the unique and tailor-made design and manufacturing has left its place to uniformity and repetition with mass housing. Mass manufacturing and individual design -the two positive aspects in design and productioncome together in mass customization. Mass customized housing projects have great potential and it is easier now to design computer tools with promising features. Different approaches can be implemented in these tools and defined relationships and design decisions can be computerized in order to obtain various solutions. In this paper, a design method and a computational tool for generating mass customized housing plan layouts with "Open Building" approach is detailed in which design flexibility and mass customization have been taken into consideration for basic design decisions
