Initiated at the request of the City of Paris Urban Ecology Agency, this atlas of businesses is the initial stage of a broader work on the issue of energy efficiency of businesses. Due to the ambitious objectives of the Parisian Climate Plan (notably carbon neutrality and a 50% reduction of energy consumption), the services sector and its 59 million m², i.e. over 45% of the total floor area in Paris, should also evolve in order to contribute to achieving these objectives.