The Leidenfrost effect involves the formation of a thin vapor layer between a volatile droplet resting on a sufficiently hot substrate. Various aspects of the Leidenfrost effect and film boiling have been widely studied. Recently, electrostatic suppression of the Leidenfrost state has been studied to eliminate the vapor layer, suppress Leidenfrost state and enhance the heat flux. Various techniques like high-speed imaging, infrared imaging, interferometry and acoustics have been utilized to study various aspects of electrostatic suppression. While all these techniques provide useful information about the dynamics of electrostatic suppression, none of them can estimate the actual area during electrostatic suppression. In this study, electrical impedance measurements are used to calculate the wetted area during electrostatic suppression of the Leidenfrost state. The wetted fraction is measured as a function of the applied voltage, surface superheat and surface roughness. Experiments are conducted on three surfaces with various levels of surface roughness. It is seen that electrical impedance measurements can provide significant insights into the influence of surface roughness on electrostatic suppression that is not possible via other measurement techniques.