On Earth, Buildings or Infrastructure uses 40%-50% of its energy, whereas on other side green buildings or sustainable buildings uses a minimum amount of energy with the use of energy-efficient construction materials. Green building creates a positive impact on human health and also to the climate along with reducing negative impact. Green building established areas are much healthier than regular developed areas. These green buildings' characteristics are discussed in terms of their completeness and specificity and are compared to their guidance on building construction, design, and operation for good indoor air quality. Here, a case study of indoor air quality performance in a green building is presented. This study includes a description of the indoor air quality features of the building and the results of a short -term indoor air quality evaluation of the building involving ventilation and contaminant concentration measurements.