Finch Cambridge is the largest new construction affordable housing development in the City of Cambridge in 40 years. As a Passive House project with a 105 kW PV array on the roof, it will also be one of the most operationally energy efficient buildings in Massachusetts. Currently in the final months of construction, this project has many important lessons to teach teams interested in Passive House certification. This session will focus on challenges, approaches tried, and how our extensive team of designers, builders and consultants worked together to execute. We will share details that are affected by sequence and how we worked collaboratively to ensure they could be implemented; strategies for dialogue with the GC and appropriate trades on site intended to ensure appropriate awareness of goals, sequence and constructability; and our approach to testing and performance data received at various stages of the project.