all construction and renovation activities of buildings in general contracting; all technical installation activities of buildings in general contracting such as home automation, computer networks, alarm systems, heating, plumbing, air conditioning and ventilation; all activities in the field of renewable energy, in particular solar and photovoltaic installations; all technical management and maintenance activities of buildings as well as professional concierge services; all technical, architectural and engineering study activities in the field of real estate; all electrical and telecommunications activities in general contracting; consulting and financing of real estate projects in Switzerland and abroad; property management; real estate development; purchase and sale of real estate in compliance with the LFAIE (see articles of association for full purpose).