Paris operates under the DTU (Documents Techniques Unifiés) standards and Eurocodes, administered by the Paris Prefecture and Mairie de Paris. Approvals typically require 4-10 weeks. Paris has a population of approximately 2.2 million in the city proper, 12.2 million metropolitan area. Paris is in low seismic zone with standard wind load requirements. Notable requirements include energy performance standards, heritage conservation in historic districts (including UNESCO World Heritage sites), accessibility compliance, and environmental protection. Approval fees typically range from 0.5-1.0% of construction value. Paris offers expedited approval for sustainable projects and strictly protects the city's historic character and UNESCO status.