A growing number of users of environments have negative feelings about contemporary products of architects, urban planners and interior designers. Their criticism is functional as well as aesthetic. Discontentment of users signals a low level of quality and should be concern of environmental designers. The proposed model explains which aspects of the build environment, do influence environmental value, judgements of users. It deals with four aspects: the social aspect, the spacial aspect, the organisational aspect and the service aspect (Canter, 1983). Such a model is only useful in a design process when it is related existing structures of decisionmaking and does express itself in a language that designers understand. It is important to acknowledge in this context that design decisions are made at different levels of abstraction and scale. The use of this model in design and evaluation research is discussed, using examples out of our own practise.