"How much will it cost" to build using the Passive House standard? How do you Plan and Build Multifamily Passive Housing for Less than other similar size projects that are market comparable? Lessons Learned, Best Practices, used in the meeting the Passive House approach, from conception, to planning, to completion are presented. An examination of why Developers choose building to this voluntary standard, and what the first generation of multifamily Passive House buildings cost to construct, show how to lowering the cost of planning and building any high-performance Project makes sense.