Mumbai operates under the National Building Code (NBC) 2016 administered by municipal authorities. The Municipal Corporation of Greater Mumbai (MCGM) manages approvals with typical timelines of 4-10 weeks. Mumbai has a population of approximately 20.9 million in the metropolitan area. Mumbai is in Seismic Zone III with moderate seismic design requirements. Notable requirements include fire safety, flood resilience for monsoon season, water conservation, and accessibility standards. Approval fees typically range from 0.3-0.7% of construction value. The city offers expedited processing for projects meeting sustainability criteria and has established standards for managing rapid urbanization.