What faucet replacement actually involves
Faucet replacement is the process of removing an existing kitchen or bathroom faucet and installing a new one in its place, including any new supply lines, shut-off valves, and gaskets that the old setup needs swapped out at the same time. The visible part of the job is the chrome, brushed nickel, or matte black fixture you see above the sink, but most of the actual work happens underneath: disconnecting hot and cold supply lines, loosening the mounting nuts that hold the faucet to the deck, lifting the old unit out, threading the new one through the existing holes, and reconnecting everything without a leak. A standard kitchen faucet swap takes 60 to 90 minutes when nothing fights you. Older Los Angeles homes often add complications that turn that into a 2 to 3 hour job, which is why the price you see online and the price you actually pay can differ.
The Los Angeles water situation matters more than people realize. LADWP water hardness runs roughly 100 to 250 parts per million calcium carbonate depending on neighborhood and source mix, which is moderately to very hard by industry standards. Hard water is rough on faucets in two specific ways: aerators clog with white mineral scale within 6 to 18 months and need cleaning or swapping, and finishes especially on cheaper chrome or low-grade brushed nickel show etching and pitting after 5 to 8 years instead of the 15 to 20 the manufacturer brochure suggests. This is why faucet replacement is a more frequent job in LA than in soft-water cities like Seattle or Portland, and why upgrading to a better-grade fixture is often worth the extra fifty to a hundred dollars.
A complete faucet replacement covers more than just the fixture itself. Most jobs include inspecting the shut-off valves under the sink (the small chrome quarter-turn or compression valves on the supply pipes), checking whether the existing supply lines are still safe or have hit their 12 to 15 year lifespan, confirming the holes in the sink or countertop match the new faucet's footprint (single-hole, three-hole 4-inch centerset, three-hole 8-inch widespread, or four-hole with separate sprayer), and verifying that the new fixture clears any backsplash or window behind the sink. A pro will catch all of this during the first ten minutes; a DIYer often discovers a problem after the old faucet is already out and the new one doesn't fit.
When you need this service
The current faucet leaks from the spout when off, drips at the base when on, or sprays from the handle. Cartridge replacement can sometimes fix this for $20 to $40 in parts, but if the faucet is over 10 years old or a budget brand, full replacement usually costs the same or less than diagnostic plus repair, and you get a fresh warranty out of it.
You're remodeling the kitchen or bathroom and want the fixture to match new countertops, cabinets, or tile. Faucet finish drives a lot of the visual feel of a kitchen, and a worn chrome faucet on a fresh quartz countertop reads as unfinished. This is the most common reason homeowners book a swap in LA — the old fixture survives the remodel timeline and gets replaced last.
The aerator clogs constantly, water pressure has dropped, or the sprayer hose has split inside the cabinet. LA hard water destroys aerators and pull-down sprayer hoses faster than the rest of the country, and on cheaper faucets these aren't field-replaceable parts — they're built into a sealed assembly. When the symptoms come back month after month, replacement ends the cycle.
You want to upgrade to a touchless or pull-down faucet for kitchen convenience, or to a widespread three-hole faucet for a bathroom that currently has a basic centerset. Modern Moen, Delta, and Kohler kitchen faucets with magnetic dock pull-downs are genuinely better tools than what was standard 15 years ago, and the install footprint usually still fits a single-hole sink without any countertop changes.
You're selling the home and a dated faucet is dragging down the kitchen or bathroom in listing photos. A $180 to $280 faucet swap (fixture plus labor) is one of the highest return-on-investment fixes for a sale in LA, especially in price-sensitive bracket homes in the San Fernando Valley, East LA, and South Bay where buyers compare fixture quality directly between listings.
How to choose the right pro
Confirm the pro is comfortable with older Los Angeles plumbing. Pre-1980s homes in Highland Park, Echo Park, West Adams, and parts of the Valley often have galvanized steel supply lines, corroded brass shut-off valves that won't fully close, and angle stops that haven't been turned in 30 years. A pro who only works on new construction or modern condos may quote you for a simple swap and then walk away when they discover the shut-off valve is seized. Ask directly: have you replaced shut-off valves in the last month, and what's your rate if mine need to come out?
Verify the pro carries supply lines and basic shut-off valves on the truck. Standard 3/8 inch compression to 1/2 inch IPS supply lines (braided stainless, 12-inch and 20-inch lengths) and 1/4-turn ball valves cost the pro a few dollars each but save you a 30-minute Home Depot run mid-job. A pro showing up with only the faucet you ordered and no parts inventory is a flag — they're hoping nothing under the sink needs attention.
Match the pro to the faucet type and brand. High-end faucets like Brizo, Hansgrohe, and Grohe sometimes use proprietary mounting hardware, metric thread sizes, or unusual connection types that an unfamiliar pro will fight for an extra hour. If you bought a Brizo Litze or a Hansgrohe Talis, ask the pro if they've installed that brand before. Most pros are fluent in Moen, Delta, Kohler, Pfister, and American Standard — those are the safe defaults.
Read recent reviews specifically for plumbing under-sink work, not general handyman jobs. A pro with great reviews for TV mounting and furniture assembly may not be the right pick for a faucet replacement on a 1932 Spanish-revival home with original galvanized lines. Look for review language like 'replaced shut-off valves', 'fixed corroded supply', or 'old plumbing' — that's the experience profile you want.
Ask whether they bring the faucet or you provide it. About 70% of LA faucet replacements are homeowner-provided fixtures (you bought it from Home Depot, Build.com, or Wayfair) and the pro only handles install. The other 30% have the pro source it, usually marked up 20 to 30% over retail in exchange for warranty coverage on both fixture and labor. Either is fine — just confirm which you're paying for.
Get a clear answer on what happens if the existing shut-off valve fails during work. The honest answer is: in pre-1990s LA homes, there's a real chance the old valve won't fully close, in which case the pro needs to shut off the main water supply at the meter and replace the valve before continuing. This adds 30 to 60 minutes and $40 to $80 to the bill. A pro who acts surprised when this happens has not worked on enough older LA homes.
Pricing in Los Angeles
Standard kitchen faucet replacement in Los Angeles runs $120 to $220 for labor alone, assuming the existing shut-off valves work, the supply lines are recent, and the new faucet matches the current hole configuration. This covers removing the old fixture, installing the new one with its included gaskets and mounting hardware, reconnecting the supply lines, testing for leaks, and cleaning up. Most jobs in this range take 60 to 90 minutes from arrival to leaving.
Standard bathroom faucet replacement runs $100 to $180 for labor. Bathroom faucets are smaller and lighter, but they often sit in tighter cabinet space which can offset the time saved. A widespread three-hole bathroom faucet (separate hot, cold, and spout) takes longer than a centerset (single fixture covering all three holes) because there are three separate connections instead of two — budget toward the higher end of that range for widespread installs.
Add-ons that change the price: shut-off valve replacement when the existing one is seized or leaking ($40 to $80 per valve, and bathrooms typically need both hot and cold), supply line replacement when the existing lines are over 12 years old or visibly corroded ($15 to $25 per line for parts, included in labor), garbage disposal coordination when the kitchen faucet swap requires temporarily disconnecting the disposal drain ($60 to $100 add-on), and basket strainer or P-trap replacement if the pro notices corrosion while under the sink ($40 to $90 for parts and additional labor).
Expect the realistic out-the-door labor cost to land at $150 to $300 for most LA homes once shut-off valves and supply lines are accounted for. A flat $99 quote from a coupon ad is almost always either bait pricing (the real number after add-ons is double) or a pro who isn't planning to replace anything under the sink even if it should be replaced. The faucet itself is separate — figure $80 to $150 for a solid mid-grade Moen or Delta kitchen faucet, $200 to $400 for a Kohler or higher-end pull-down, and $100 to $250 for most quality bathroom faucets. Brizo, Hansgrohe, and Grohe premium lines run $400 to $1,200 for the fixture alone.
DIY vs hiring a pro
Faucet replacement is one of the more reasonable DIY plumbing projects when conditions are favorable. A modern kitchen faucet swap on a sink with working quarter-turn shut-off valves and recent braided supply lines is genuinely a 1 to 2 hour job for someone comfortable with basic tools. You'll need a basin wrench (the long-handled tool that reaches up behind the sink to loosen the mounting nuts — a regular wrench will not work in that space), an adjustable wrench, a flashlight, a bucket for residual water, and patience. Cost of tools if you don't own them: about $25 to $40 for a basic basin wrench from Home Depot.
Where DIY gets risky in Los Angeles specifically: pre-1980s homes where the shut-off valves under the sink have not been turned in decades. When you twist the handle to close the valve, the stem inside can break, the packing can fail and start dripping, or the valve may simply not fully shut off — leaving you with water still flowing through your supply line while you're trying to disconnect the faucet. At that point you have to shut off the main water supply for the whole house at the meter, replace the valve (which means cutting copper or working with old galvanized threads), then continue the faucet job. This is where DIYers end up calling a pro at 9pm with the kitchen flooded. If your house is older and you don't know the last time those valves were turned, it's worth paying a pro from the start.
Bathroom widespread three-hole faucets are noticeably harder DIY than centersets. A centerset is essentially one fixture you drop in and connect — same difficulty as a kitchen faucet. A widespread has three separate pieces (hot valve, cold valve, spout) connected by flex tubes underneath, all of which must align with the existing holes and seal against the deck independently. Plan an extra hour and expect to do some test-fitting before the final install. If you've never done plumbing before, a centerset bathroom faucet or a single-handle kitchen faucet is a fine first project; a widespread is not.
Common mistakes to avoid
Forgetting to shut off both the hot AND cold supply, or shutting off only one and assuming the other doesn't matter. The faucet has two supply lines feeding into it, and water will keep flowing from whichever one stays open. Turn both shut-off valves clockwise until they stop, then open the faucet handle to confirm no water comes out before disconnecting anything. This is the single most common DIY mistake and it's the one that ruins kitchen cabinets fastest.
Not plugging the drain before starting work. Tiny parts — set screws, washers, escutcheon clips, the small Allen wrench that came with the faucet — fall while you're working overhead under the sink, and they go straight down the drain. Once they're past the P-trap they're gone, and that set screw was the one keeping your handle attached. Stuff a rag in the drain or close the stopper before you start.
Wrapping teflon tape around compression fittings. Compression fittings (the kind on most modern shut-off valve to supply line connections) seal by metal-on-metal pressure, not by tape. Adding teflon tape there does nothing helpful and can prevent a proper seal, causing a slow drip that you won't notice until the cabinet base swells two weeks later. Teflon tape belongs on tapered pipe threads (NPT), not compression fittings.
Overtightening plastic supply line nuts. Modern braided stainless supply lines have plastic or thin-metal nuts that hand-tighten plus a quarter turn with a wrench, no more. Crank them down hard and you crack the nut, which can hold for a few days and then fail catastrophically while you're at work. The instruction sheet that came with the supply line says hand tight plus 1/4 turn for a reason — believe it.
Reusing supply lines that are over 12 years old because they 'still look fine'. Braided stainless supply lines have a 12 to 15 year design life. The internal rubber bladder degrades from chlorine and hard water exposure long before the outer braid shows any wear, and when it fails it splits open and floods the cabinet. If you're replacing a faucet on a sink where the supply lines are original to the house and the house is older than 12 years, replace the lines too. Cost is $15 to $25 per pair. Cheapest insurance you'll buy.
Frequently asked questions
How long does a faucet replacement take in a typical Los Angeles home?+
A clean kitchen swap with working shut-off valves and recent supply lines is 60 to 90 minutes. A bathroom centerset is similar. A widespread bathroom faucet runs 90 minutes to 2 hours. If the pro discovers seized shut-off valves or corroded supply lines (common in pre-1980s LA homes), add 30 to 60 minutes for the valve replacement plus the parts run if they didn't bring the right size. Most realistic appointments are booked as a 2-hour window for that reason.
Do I need to buy the faucet myself or does the pro bring one?+
Either works and it's a personal preference. About 70% of LA homeowners buy their own faucet from Home Depot, Lowe's, Build.com, or Wayfair and have the pro install only — this is usually $40 to $80 cheaper total and gives you full control over brand, finish, and price. The other 30% have the pro source it for an extra 20 to 30% markup, which buys you fixture plus labor warranty in one place and skips the picking step. If you go DIY-source, confirm the hole configuration (single-hole, 4-inch centerset, 8-inch widespread) matches your sink before ordering.
What faucet brands do LA pros recommend?+
For solid mid-range value: Moen, Delta, and Kohler — all three have strong warranties, parts availability at Home Depot for future repairs, and good track records in LA's hard water. Pfister and American Standard are reasonable budget options under $150. For higher-end remodels: Kohler Artifacts and Purist lines, Brizo, Hansgrohe, and Grohe — all quality but with proprietary parts that take longer to source if something needs warranty work down the road. Avoid the cheapest house-brand faucets under $60 — the cartridges fail within 2 to 3 years in LA water.
Why does my faucet aerator clog so often?+
Los Angeles tap water runs 100 to 250 ppm calcium carbonate depending on neighborhood, which is moderately to very hard. Hard water deposits white mineral scale on the aerator screen at the spout, restricting flow and creating a sputtering spray pattern. The fix is to unscrew the aerator (counterclockwise from below the spout, sometimes needs a rubber jar gripper for grip), soak it in white vinegar for 30 minutes, scrub the screen with a toothbrush, and reinstall. Doing this every 6 to 12 months is normal in LA. If your faucet has a sealed aerator that won't unscrew, that's a budget faucet design and replacement is the only fix.
My shut-off valves under the sink won't fully close. What now?+
Common in any LA home older than 30 years, especially in pre-1980s construction in Highland Park, Echo Park, Mid-City, and the older Valley neighborhoods. The valve is seized or the rubber washer inside has hardened. The pro fix is to shut off the main water supply at the meter, cut the old valve off the supply pipe, and install a new 1/4-turn ball valve (these are far more reliable than the old multi-turn compression valves). Cost is $40 to $80 per valve including parts. If you're already replacing the faucet and the valves are old, doing both at the same visit makes sense and saves a future trip charge.
Do I need to replace the supply lines when I replace the faucet?+
If they're under 8 years old and visibly clean, no. If they're 12 years or older, yes — braided stainless supply lines have a design life around 12 to 15 years and the internal rubber bladder fails before any outer signs appear. A failed supply line can flood a kitchen in minutes. Replacement cost is $15 to $25 for a pair of 20-inch braided stainless lines, which is trivial compared to the cabinet damage from a burst line. Any pro will recommend swapping them on older installs and most include this in the labor estimate when they see the condition.
Can I install a pull-down kitchen faucet on my existing sink?+
Almost always yes if your sink has a single-hole configuration or a four-hole setup where you can blank off the extra holes with the included escutcheon plate. The pull-down hose hangs into the cabinet space below and needs about 18 to 24 inches of vertical clearance under the sink, which most kitchens have. The exception is shallow cabinets under the sink (less than 18 inches deep) where the hose would coil tightly — possible to install but the spray-head won't retract smoothly. Measure cabinet height before ordering.
What's the difference between a centerset and widespread bathroom faucet?+
Centerset is a single unified fixture that covers a 4-inch hole spread — three holes in the sink but the faucet body bridges them into one piece. Easier to install, lower cost ($60 to $200 typical), and fits standard bathroom sinks from the last 30 years. Widespread is three separate pieces (hot handle, cold handle, spout) connected underneath the sink with flex tubes, designed for sinks with 8-inch hole spread or for 3-hole sinks where you want a more custom look. Widespread costs more ($150 to $500), takes longer to install, and looks higher-end. Match the new faucet to your existing hole spacing — converting between the two requires either a deck plate or replacing the sink.
Will replacing my faucet affect my garbage disposal?+
Usually no, because the disposal connects to the drain side of the sink, not the faucet supply side. But if the new kitchen faucet is significantly taller, has a side sprayer, or your sink has a tight cabinet, the pro may need to temporarily disconnect the disposal to access the faucet mounting nuts from below. This adds $60 to $100 to the job. If you have a separate dedicated faucet for filtered water or a soap dispenser running off the same setup, mention these when getting the quote — they affect both time and the part list.
Can a faucet replacement be done in a condo or apartment without notifying the building?+
Most LA condos and apartments allow tenant or owner-initiated faucet swaps without a permit or building notice — it's considered a fixture replacement, not a plumbing alteration. That said, modern DTLA, Koreatown, and West LA buildings on PEX plumbing are easier and faster than older Wilshire Corridor buildings still on copper or galvanized. Always know where your unit's main shut-off is before starting, and if the building requires the water to be shut off at the floor or building level (very rare for a faucet swap, but it happens in some pre-1980s buildings), notify the manager 24 to 48 hours ahead. If you rent, check the lease — most leases allow fixture upgrades but require restoration to original at move-out.