Abstract: Inhalation exposure caused by vapor intrusion (VI) with the migration of volatile organic compounds (VOCs) from soil and groundwater into the indoor environment is essential to the human health risk assessment of VOCs in contaminated sites. Building parameters are important factors that affect the VOCs migration from the contaminated soil to indoor air and change the indoor concentration for population exposure. The technical documents of building parameters for exposure risk assessment in developed countries such as the UK and the US were elaborated systematically, and the determination methods of three key parameters affecting VI, namely, air exchange rate, building volume and foundation crack, were summarized. Furthermore, the research development of building parameters in China’s exposure risk assessment was illustrated, and the idea of improving building parameters and their technical methods were put forward, from the aspects of collecting cross-sectoral basic data and constructing regional localization parameters, to provide technical support for the refined exposure risks assessment in VOCs contaminated sites in China.