Delhi operates under the National Building Code (NBC) 2016 administered by municipal authorities and the Delhi Cantonment Board. The Municipal Corporation of Delhi (MCD) manages approvals with typical timelines of 4-12 weeks. Delhi has a population of approximately 32.9 million in the metropolitan area, making it one of the world's largest cities. Delhi is in Seismic Zone IV with stringent earthquake-resistant design requirements. Notable requirements include fire safety, water conservation, waste management, and accessibility standards. Approval fees typically range from 0.4-0.8% of construction value. The city offers expedited processing for sustainable projects and has established standards managing extreme growth.