Urban areas are home to a great number of people, all living within close proximity to one another. In 2022, “the world’s population reached 8 billion… with over half (55 percent) living in urban areas, a figure projected to rise to 70 percent by 2050” (United Nations). With that said, it is crucial that individuals have access to clean air, water, public transportation, green spaces, etc., to ensure happy and healthy lives. Sustainable urban planning aims to accomplish this by balancing social, economic, and environmental needs. How? With Multi-Criteria Decision Analysis (MCDA). In this sense, it is a method for evaluating several options or objectives, where each objective's importance is weighted against others. This article will discuss how this technique works along with other algorithms used for sustainable urban planning.