Istil, Seyda AdiguzelGorecki, JaroslawDiemer, Arnaud2024-11-072024-11-0720232071-1050https://doi.org/10.3390/su15032770https://hdl.handle.net/11480/16053Increased greenhouse gas emissions have led to a global warming threat. As a result, countries have tended to focus their decision-making attention on energy-saving strategies. Specifically, the concept of green building has been developed for the construction sector. It aims to create energy-efficient structural activities (new constructions, repairs, or renovated constructions) that will be carried out in line with the determined criteria. With the concept of green building and the need to establish criteria and standards to ensure energy efficiency, green building certification systems have come to the fore. The Leadership in Energy and Environmental Design (LEED) and the Building Research Establishment Environmental Assessment Method (BREEAM) certification systems have been developed. This article investigates the achievements of the Indoor Environmental Quality (IEQ) category of LEED-certified projects in Turkiye and Europe. A comparison study of countries was carried out, based on the fourth version of the LEED BD+C framework that was developed for new green building projects. The study's primary goal is to show the linear correlation between market value and IEQ. It was revealed that the gross domestic product does not affect IEQ applications. Although Turkiye was ranked first in applying for IEQ credits, its economic development level is lower than that of other European countries.eninfo:eu-repo/semantics/openAccessindoor environmental qualitybuilding performanceLeadership in Energy and Environmental Designsustainability determinantsParis AgreementArticle15310.3390/su150327702-s2.0-85148019589Q1WOS:000931369800001Q2