Microalgae show significant potential in decreasing CO2 emissions associated with buildings throughout their life cycle by both enhancing energy efficiency and actively capturing CO2. The use of microalgae photobioreactor façades as integral building components provides several advantages, such as serving as an efficient insulation system, shading, solar collection, and light-to-biomass conversion. Photobioreactor facade-integrated building components have the potential to reduce energy consumption by up to 30%. In addition to providing an overview of recent research on this novel system, this paper analyzes the state-of-the-art knowledge on microalgae photobioreactor façades. This article also provides an overview of the thermal performance of different microalgae photobioreactor façades. Some significant recommendations for future work will also be discussed in terms of environmental sustainability and the thermal behavior of microalgal photobioreactor façades.