This study explores the usefulness of floorplan analysis on the development of spatial concepts in architectural design processes. Each floorplan can be considered as a reflection of the goals and activities of the user as interpreted by the architect. By comparing a wide range of building layouts for similar organizations one may achieve a good understanding of the way organizational characteristics are (can be) expressed into spatial solutions. Different evaluative studies have been made on e.g. child care centres, health centres and pedestrian subways. In the study reported here, in which 50 Dutch health centres were analysed comparatively, definite relationships between organizational and spatial concepts were found. This information is used both as a mean to make organizational principles more explicit as well as data for briefwriting and design guidelines.