"This article demonstrates and analyzes a Post-Occupancy Evaluation (POE) applied to four large office buildings located in the city of São Paulo, assessing user satisfaction in regards to environmental comfort. It seeks to explain new trends in the application of POE in Brazilian metropolitan areas. whose more recent urban and technological transformations demand a greater number of interdisciplinary studies of the evaluation of the performance of office work environments. The buildings studied here are designed as "landscape offices" and total more than 86,500m2 of built area, and at the time of the study (1995/1996) contained 2,512 workers. Buildings "A" and "B" are highly automated, and "C" and "D" are traditional buildings representing three distinct generations of architecture and philosophy of business administration. Since productivity and absence from work for health reasons are often associated with the satisfaction of users with the quality of their work environment, this paper will present key methodological issues and results of the research in regards to environmental comfort (lighting, temperature, acoustics and ergonomics), with a view to the establishment of design performance criteria."