We describe a strategy to design highly electrically conductive polycarbonate nanocomposites by using multi-walled carbon nanotubes coated with a thin layer of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate), a conductive polymer. We used a latex-based route to coat the nanocomposites. We found that this coating method improves the electrical properties of the nanocomposites in two ways. First, the coating becomes the main electrical conductive path, increasing the overall conductivity of the nanocomposite. Second, the coating promotes the formation of a percolation network at a low filler concentration (0.3 wt%). To tailor the electrical properties of the conductive polymer coating, we used a polar solvent ethylene glycol and we can tune the final properties of the nanocomposite by controlling the concentrations of the elementary constituents or the intrinsic properties of the conductive polymer coating. This very flexible technique allows for tailoring the properties of the final product.