CSM Group adds Building Construction services in Coffs Harbour, Bellingen and Nambucca Heads CSM Group adds Building Construction services in Coffs Harbour, Bellingen and Nambucca Heads CSM Group adds Building Construction services in Coffs Harbour, Bellingen and Nambucca Heads CSM Group adds Building Construction services in Coffs Harbour, Bellingen and Nambucca Heads CSM Group adds Building Construction services in Coffs Harbour, Bellingen and Nambucca Heads.