Hospital architecture is a complex theme, and attending all the requirements necessary for designing these institutions represents a great challenge to all the responsible professionals in its planning. Regarding this, understanding the needs of these environment users should be one of the most important guidelines, for it is known that, in an hospital environment, the people are more emotionally affected due to their weakened physical state, increasing the relevance of the architecture to influence them in a positive way. This work consists in a Post-Occupation Evaluation approach to Environmental Psychology. The case study was conducted in 1st Surgical Internment Clinic of the University of Santa Catarina’s Federal Hospital. This article means to discuss the use of different employed methods as tools for practical results in architecture. In order to undertake this research, a bibliographical revision and elaboration of methods to evaluate user perceptions and behaviours was conducted: structured interviews and spreadsheet for systematic observation of the behaviours. Moreover, a technical-functional evaluation was carried out, that beyond evaluating physical characteristics of the space, studied the present Brazilian regulations and norms. Comparisons were made between the collected data from the different methods. The study allowed to find different and/or contradictory spatial needs between users, that aren’t always evident. The technical evaluation pointed reasons for behaviours and perceptions, and insufficiencies of the attendance to the norms that mean to assure quality to the environment. The evaluation presented, not only showed pointers for health environments in general, but also it pointed out which modifications would prove necessary to the studied environment, generating an architectural project for the reformation of this hospital wing. The intention of this work is not to define a design model, since each different context demands a specific solution. One expects, however, that the pointed alternatives may assist in the performance of the professionals who work in the area, and post a contribution for the improvement of the current legislation and expand the debate on the subject.