Cost of Electrical Wiring
Electrical wiring now-days is usually with concealed wiring, where the wiring is hidden under plaster. Concealed wires are placed inside walls & below flooring. Wires are protected inside duct/channel.
Cost depends on number of switches required, or rather connections
Wiring for Special equipments, heavy duty appliances cost more.
Cost for new connection is different from cost of replacing old electrical point.
Cost of Switch & Switch board varies with brand & design
Modular Switch boards are new trends. They allow easy maintenance & look good.