Bathroom faucet replacement cost in Bellevue: what you pay and why

How much does bathroom faucet replacement cost in Bellevue?

Plumber-supplied and installed: $285–$650 depending on fixture. Customer-supplied fixture, plumber installs: $185–$275 for a standard single-hole or centerset.

Should I buy the faucet myself or have the plumber supply it?

Buy it yourself if you have a specific finish or brand in mind. Use plumber-supplied if you want a hassle-free warranty and don't want to make returns if something is wrong.

Buying your own faucet and having the plumber install it saves money on the fixture — but it puts you in charge of the return if the faucet is defective, the wrong size, or missing parts. Big-box store faucets in the $80–$200 range are generally fine for standard installs; the ones that cause callbacks are the heavily discounted or unlabeled products that arrive with incomplete hardware.

Plumber-supplied faucets come with a warranty backed by a licensed contractor. If the faucet fails within the warranty period, the plumber handles the replacement — you're not making a trip back to the store. For rental properties or high-use bathrooms, the warranty backstop is worth the price difference.

The practical middle ground: choose your finish and style, buy from a reputable brand (Moen, Kohler, Delta, Grohe), verify the number of mounting holes matches your sink before you order, and confirm the drain assembly is included or purchase it separately.

How many holes does my bathroom sink have?

Single-hole (1 hole) takes a single-hole or centerset faucet. Three holes spaced 4 inches center-to-center take a centerset or mini-widespread. Three holes spaced 8 inches center-to-center take a widespread faucet with separate hot and cold handles.

Measuring the hole spacing before ordering a faucet prevents the most common return: a 4-inch centerset ordered for an 8-inch widespread sink, or vice versa. Measure center-to-center from the left handle hole to the right handle hole. 4 inches = centerset. 8 inches = widespread. Some vessel sinks have a single hole centered above the basin for a single-handle faucet.

Most Bellevue homes built after 2000 have centerset (4-inch) vanity faucets. Homes with pedestal sinks frequently have single-hole faucets. Older homes sometimes have wall-mount faucets, which are an entirely different installation (involves opening the wall and is priced separately — typically $450–$800 for conversion to a deck-mount).

What else usually needs replacing at the same time?

Supply lines should always be replaced. Shutoff valves under the sink are worth replacing if they're original to the house or show corrosion. The drain assembly (pop-up stopper and P-trap) is worth doing if it's slow or leaking.

Faucet supply lines — the braided stainless hoses connecting the faucet to the shutoff valves — should be replaced every time a faucet is changed. They're inexpensive and a failed supply line soaks a cabinet and floor in minutes. We include new supply lines in every faucet installation.

The shutoff valves under the sink (the angle stops at the wall) often haven't been turned in 10–20 years. Corroded valves that won't fully close are a liability — they leave you without a way to isolate the faucet for any future repair without shutting off water to the whole house. Replacing them at the same time as the faucet is $95 per valve and takes five minutes while the water is already off.

The drain assembly — the pop-up stopper, pivot rod, drain body, P-trap, and trap arm — often needs replacement on 15+ year-old vanities where the pivot rod has corroded or the pop-up no longer seals. This adds $85–$145 to the job.