This is the final design of my Thesis for a Master of Science in Sustainable Design, completed in the Summer semester of 2019. A research paper was completed over the course of the Spring and Summer semesters of 2019, along with the design aspect of the project. Here is the conceptual visual representation of the project, along with some graphics that represent the calculations for energy reduction, water usage, and rain water collection. The thesis topic is: The Design of an Historic Multifamily Passive House Renovation in Park Slope, Brooklyn, NY. The selected site is a 131 year old residential building in the Historic District of Park Slope. The principles of Passive House design and construction, and historic renovation according to the guidelines of New York City were researched and implemented. Subject Matter Experts were interviewed throughout the research and design process. The goal of the project was to create an energy efficient design while preserving the historic elements of the building.