This article presents a systematic literature review on residential property investor types in selected social science disciplines and critically evaluates the status quo of academic engagement within this diverse group of property market actors. A recurring critique in recent years has been the minimal acknowledgment of investor heterogeneity particularly in relation to urban development and the financialization of housing. Yet, to date, there is no systematic evidence supporting these contentions. Therefore, we conducted an exhaustive literature review of residential investment landscapes through the Web of Science citation database in the following fields: Urban and regional planning, geography, sociology, urban studies, public administration, and economics. Subsequently, we methodically searched for the types of investors addressed, and investor categories employed, in journal articles published between 2000 and 2019. Following a meta-categorization of the results, we demonstrate how existing literature differentiates investors in terms of their spatial scale of operation, size and social composition, investment object and finance, or investment and social behavior. Additionally, we highlight the key topics and issues addressed in the reviewed literature within each meta-category. We propose to turn the four meta-categories into a multidimensional analytical framework as a point of departure for a more nuanced and in-depth understanding of investor differentiations, a tool that is urgently needed in Planning Studies and related disciplines. Furthermore, we argue that mixed method approaches combining hard and quantifiable with soft behavioral investor characteristics, as well as institutional analyses combining structural considerations with actors’ agency, are indispensable to disentangle contemporary residential property market dynamics.