The various HEEPI High Performance Guides and Green Gowns brochures in the publications section have many mini cases on high performance buildings in the sector. The HEEPI legacy website also has a number of case studies (see under buildings/resources). Other useful sources of cases are:
BREAAM awards which represent the UK's top examples of sustainable design including a number of university examples.
EAUC's Resource Bank on Sustainable Construction and Case Studies.
LEED projects and case studies. The US Green Building Council's internationally recognised green building certification system.
UK Green Building Council (UKGBC)