Woodlawn Senior is a five-story, 80-unit project located in the Bronx, NY, nearing completion and used a traditional delivery method. Bethany Terrace, a 4-story, 58-unit, affordable housing to start construction in 2021, uses modular construction and is a Second Round NYSERDA Building of Excellence winner. This presentation illustrates challenges in building affordable Passive House projects and how modular construction can decrease construction time, control costs, increase quality, and decrease construction waste emissions.