Mexico City operates under the Normas Técnicas Complementarias (NTC) and Mexico City Building Code. The Secretaría de Desarrollo Urbano y Vivienda (SEDUVI) manages approvals with typical timelines of 4-10 weeks. Mexico City has a population of approximately 21.6 million metropolitan area. Mexico City is in Seismic Zone C with stringent earthquake design requirements due to high seismic activity and soft soil conditions. Notable requirements include seismic resilience standards, accessibility compliance, water conservation, and heritage conservation in historic districts. Approval fees typically range from 0.4-0.8% of construction value. Mexico City offers expedited approval for sustainable projects and has world-leading earthquake resilience standards.