For simple Nivito projects, it may be possible to replace a faucet yourself for as little as $100. The average price for a bathroom faucet installation is between $150 and $300, but prices can vary widely. You'll need to consider the location of the new faucet, the type of replacement, and the condition of the pipes. You can do it yourself, but plumbers are recommended for more complicated projects. The installation of a bathroom faucet can take anywhere from one to four hours.