The seismic performance of premodern buildings, which were often constructed without contemporary seismic codes, is critical due to the potential catastrophic consequences of earthquakes. Persistent updates to seismic codes aim to reduce structural vulnerabilities and risks, especially in seismically active regions, by incorporating the latest research and empirical data. This study applies modern Incremental Dynamic Analysis (IDA) to an old, reinforced concrete (RC) building designed using premodern codes in Albania. This building was implemented as a template project across various locations in the country which represents a significant risk due to its continued use in our seismically active region frequently affected by earthquakes. The study provides a detailed methodology for applying IDA based on current guidelines and coherent studies. The building is modeled as 2D frames in both orthogonal directions using ZEUS-NL software. IDA curves are derived from 20 ground motion records, with 5% damped first mode spectral acceleration, (S_a(T1,5%)) as the intensity measure (IM) and maximum global drift ratio (ϴ_max) as the damage measure (DM). Limit states are defined according to FEMA 356 standards. The IDA curves are then categorized into 16^th, 50^th and 84^th percentiles, as recommended in the literature. Final results provide statistical data on the vulnerability of the building based on the IM and DM parameters selected for this study.