All services related to real estate, in particular managing the design and management of contract work in the field of real estate design, construction or reconstruction of commercial and industrial civil buildings, for public or private entities, including buying, selling and renting, excluding operations prohibited by the LFAIE; cleaning, maintenance and general building work (rough and finish work) by commissioning professionals and companies registered in professional registers, including electricity, plumbing including sanitary water systems, ventilation and air conditioning.