In recent years pluvial (rain-related) floods are causing more and more damage to urban areas. In the future, an increase in ongoing urbanization and in extreme precipitation events are expected, which imposes the need to develop a comprehensive (multiscale) methodological framework that could prevent and mitigate adverse consequences of pluvial floods. In this paper, we present a new methodological framework for multiscale modeling of urban pluvial flooding developed in the STREAM (Strategic development of flood management) project, funded by the Italy-Croatia cross-border cooperation program 2014-2020. This newly developed framework includes three levels of research (macro - meso - micro). The macro-level encompasses the catchment area of the Zadar settlement, meso-level the administrative border of the city and, the micro-level encompasses a small pilot area (<5 ha) within the Zadar. Spatial data with a resolution of several millimeters up to 60 cm will be collected and processed using a wide range of geospatial technologies. This developed multiscale framework can be considered as an important decision-support tool that can further improve existing decision practices in relation to urban drainage.