Look to ArchitectureWeek - No. 574 http://www.archweek.com/2013/0130/index.html
for the article "Foundations of Passive House" by Franca Trubiano. It is an excellent update and quick summary of Passivehaus - the one established building standard that meet's California's energy standard for 2020 today. It is worth noting that Passive House is applicable to more than just houses as 'haus' actually translates to buildings - commercial, residential, institutional, public space.
Shown here are two projects, in Berlin and Kamakura, discussed in the article:
By Architektur Werkstatt Vallentin
By Key Architects