Dripping Faucet Repair Cost in California: Fix It Yourself or Call a Plumber?
A dripping faucet is easy to tune out — until you see the water bill, or the drip becomes a steady trickle. The good news: most faucet drips are cheap to fix, and many are within DIY reach. Here's what causes them, what the leak is actually costing you, and when it's worth calling a plumber.
What that drip is actually costing you
It's more than it looks. Household leaks add up to a meaningful share of indoor water use: the Water Research Foundation's Residential End Uses of Water study (Version 2), led by W. DeOreo and P. Mayer, measured leaks at roughly 12% of average indoor water use across studied homes, with a small share of homes leaking dramatically more (see the study on Google Scholar). In drought-prone California, where water is both scarce and priced accordingly, a steady drip is money running quite literally down the drain — which is why fixing it promptly usually pays for itself. Our water-saving plumbing guide and low-flow fixture rules cover the bigger conservation picture.
Why faucets drip
The cause depends on the faucet type, but it's almost always a worn internal part:
- Compression faucets (separate hot/cold handles) usually drip because a rubber washer or seat has worn — the classic, cheapest fix.
- Cartridge, ball and ceramic-disc faucets (single-handle and modern two-handle) drip when the cartridge or O-rings wear or the seals mineralize — very common in California's hard water, which scales up internal parts.
- Leaking around the base rather than the spout points to O-rings or a loose packing nut.
DIY or call a plumber?
A faucet drip is one of the more DIY-friendly repairs: shut off the supply stops under the sink, disassemble the handle, and replace the washer, O-rings or cartridge with a matching kit (bring the old part or the faucet model number to the store). If you're comfortable with basic tools, it's an afternoon job. Our DIY vs professional plumbing guide helps you judge whether a given job is in your lane.
Call a plumber when: the faucet is old and parts are no longer available, the valve body itself is corroded, the supply stops are seized or leaking, the leak is inside the wall behind the faucet, or you simply don't want to risk a two-hour job becoming a flooded cabinet. If the fixture is worn out entirely, replacement often makes more sense than repair — see our faucet installation and replacement cost guide and the faucet and sink cost page.
What it costs in California
Repairing a leaky faucet is at the affordable end of plumbing work — often a short service call plus an inexpensive parts kit — though the minimum service/trip fee usually dominates the bill for such a small job, which is one reason many homeowners DIY it or bundle it with other work. Replacing the whole faucet costs more depending on the fixture you choose and whether the supply stops need replacing too. Typical ranges are on the faucet and sink cost page. To keep the bill down, our affordable plumber guide suggests bundling small fixes into one visit rather than paying a trip fee per drip.
Preventing the next drip
Because California's hard water is the main enemy of faucet seals, the same steps that protect your whole plumbing help here: consider a water softener if scale is chronic, don't overtighten handles (it destroys washers faster), and address a drip early before the constant flow erodes the valve seat. Got a faucet that's beyond a washer swap, or a leak you can't locate? Describe it on Plumber Comparator and request a free quote from a licensed plumber near you.
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