To my knowledge there are no published examples of how to design an entire building. TRADA used to do somethinng that was close for timber buildings but it was discontinued a while back.
That said there are guidance documents associated with the codes. Two I currently have sitting on my desk are:
GULVANESSIAN, CALGARO, HOLICKY, Designers Guide to EN 1990, Eurocode: Basis of Structural Design, Thomas Telford 2002.
GARDNERS AND NETHERCOT, Designers Guide to EN 1993-1-1, Eurocode 3: Design of steel structures general rules and rules for buildings, Thomas Telford 2005.