Infrastructure in Itanagar is continually being upgraded to meet the demands of a growing population in a challenging topographical setting. Electricity is managed by the Department of Power, Arunachal Pradesh, heavily relying on hydropower generated within the state; however, power outages can still occur during monsoon storms. Water supply is managed by the Public Health Engineering Department (PHED), sourcing water from local rivers and streams.
Telecommunications and internet connectivity have improved significantly. Major telecom operators like Jio, Airtel, and BSNL provide 4G/5G and broadband services, though the mountainous terrain can sometimes cause patchy cellular coverage. Solid waste management is an ongoing focus for the municipal corporation, given the ecological sensitivity of the area.