The aim of this study is to evaluate the indoor environmental quality of workplaces in Korean green building certification criteria-certified office buildings in Korea. A post-occupancy evaluation of two green and two conventional office buildings was conducted. Occupants (N = 222) completed a paper-based questionnaire related to perceived environmental satisfaction and performance. The study compared nine indoor environmental quality criteria in relation to occupant satisfaction and performance between Korean green building certification criteria-certified and non-Korean green building certification criteria-certified office buildings. The data were analyzed by descriptive statistics. The study found that in both cases (Cases 1 and 2) Korean green building certification criteria-certified buildings had better satisfaction scores in office furniture, cleanliness and maintenance, lighting, and thermal comfort quality than did non-Korean green building certification criteria-certified buildings. The study also found that in both cases (Cases 1 and 2) Korean green building certification criteria-certified buildings had better performance scores in lighting and thermal comfort quality than did non-Korean green building certification criteria-certified buildings. Office layout, office furniture, cleanliness and maintenance, lighting, thermal comfort, indoor air and indoor public space qualities have a higher influence on overall satisfaction and performance than other indoor environmental quality criteria. This study shows the value of some indoor environmental quality criteria that show a strong positive association with overall satisfaction and performance enhancement, but are not yet included in the official Korean green building certification criteria list of indoor environmental quality categories.