peer reviewed ; Due to the current rate of global warming, overheating in buildings is expected to be more frequent and intense in future climates. High indoor temperature affects occupant productivity, comfort, and health. Thus, it is necessary to predict the thermal performance of buildings concerning climate change. This paper applies a climate change sensitive overheating assessment method to a lightweight timber house in Eupen, Belgium. Three metrics are used, namely Indoor Overheating Degree (𝐼𝑂𝐷), Ambient Warmness Degree (𝐴𝑊𝐷), and Building Climate Vulnerability Factor (𝐵𝐶𝑉𝐹). The overheating risk is assessed under four climate scenarios representing historical and future scenarios using dynamic simulation tool EnergyPlus v9.0. This method accounts for overheating severity and frequency, considering zonal occupancy profiles and thermal comfort models. The results indicate BCVF<1 for the Passive House case study showing its high potential in suppressing the outdoor thermal stress in the long-term. Finally, the increase in ventilation rate proves to be an adequate measure by decreasing the zonal peak temperatures up to 10℃ and indoor overheating risk by ~60%. ; [OCCuPANt] Impacts of climate change on buildings in Belgium during summer