Electrical Upgrade from 100 amps to 150/200 amps

[Pratik Kochar]

 I am going to renovate 3Bed/2Bath 1170 Sq. Ft ranch home with new appliances ( Refrigerator, dishwasher, stove(electric or gas), washer/dryer, microwave etc and contemplating whether it requires and electrical upgrade from 100 amps to 150/200 amps.

Currently the HVAC system installed for central heating/cooling is  15 amps)and there is gas water heater.

Do you anyone know if this needs to a mandatory upgrade or any recommendations around the same and what it can cost to upgrade electric panel to 150 amps/200 amps?