Depending on the complexity of the plumbing work, a plumber can charge up to two hundred dollars for a brass faucet kitchen replacement. This may be a good option if you don't feel comfortable doing it yourself. But remember that a new installation of complicated plumbing works can take up to seven or eight hours. The time estimates above are based on the most expensive plumbers in the area, while a simple faucet replacement may cost as little as a quarter of that amount.