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Kitchen Sink Installation Cost in 2026: The Sink Is Half the Bill, the Mount Is the Labor
Chuck Thompson is a retired homebuilder and contractor who owned L.C. Thompson Construction in Jefferson City, Missouri. TheFatBook Cost Index V3 2026 (built from BLS wage and Craftsman labor data) referenced throughout this article is our proprietary dataset that powers all of our calculators and bid-fairness checkers. Full details are on the methodology tab.
Replacing a kitchen sink looks like the smallest plumbing job in the house, and the price quotes you collect will not agree. Our cost index prices a like-for-like sink swap at $800 on average, with most jobs landing between $715 and $934. If you swap the faucet in the same visit, add about $477 for that line, broken down in our kitchen faucet installation guide. Before you read a single bid, hold one ratio in your head. The sink itself is a bit under half that number, and the plumber's hours are about $109 of it. So the part of the bill that actually swings is not the brand on the box or the badge on the truck. It is one decision about how the sink meets the counter: a drop-in that drops into the hole that is already there, or an undermount that has to be cut into a solid counter and held from underneath. That mount is what moves the labor.
Where $800 Goes
| Component | Cost | Share |
|---|---|---|
| Material (sink and supplies) | $391 | 42% |
| Labor (2.6 crew-hours) | $109 | 17% |
| Permit | $0 | 0% |
| Overhead | $150 | 23% |
| Contractor margin | $150 | 19% |
| Total | $800 | 100% |
The work is a plumber's, and it books about two and a half hours: pull the old sink, set and seal the new one, connect the drain, the supplies, and the trap, then run water and watch for leaks. The plumber earns a base wage near $29.86 an hour. The bid carries that hour at $41.75 loaded, roughly 40% above base, which is the cost of workers' comp and payroll taxes on a licensed trade. Those hours at that loaded rate are where the $109 labor line comes from, and at 17% it is one of the smaller rows. The $391 material line is the biggest single row, and it is the one that actually responds to your choices. The $150 overhead line, about 23% of the job, is the business behind the plumber: the van, the license, the insurance, the trip back when a connection weeps a week later. The permit row sits at zero because a straight like-for-like swap does not pull a standalone permit; moving the drain or the supply lines is what changes that.
The Mount, Not the Brand
A drop-in sink, also called a top-mount, sets into the cutout in the counter with its rim resting on the surface. It works with any countertop, laminate included, and on a like-for-like swap it drops into the hole that is already there. The crew sets it, seals the rim, hooks up the faucet and the drain, and the job runs about as long as the baseline hours assume.
An undermount is a different animal. It hangs below the counter for a clean edge with no rim to catch crumbs, but it only works on a solid surface like granite or quartz, and it has to be clipped and supported from beneath. That bracing is hands-on time, and it is added time. Same plumber, same wage, more hours on the clock. The sink material matters here too. Stainless steel is the most common, light and durable and easy to handle. Composite granite is heavier, and it resists scratches and heat. Fireclay and cast iron are the heaviest of all, and their weight can mean extra cabinet support before anything gets connected. None of that shows up as a brand premium. It shows up as labor.
Chuck's Take: Folks call me about a "simple sink swap" and they have already bought a heavy undermount for a counter that was cut for a drop-in. That is not a swap anymore, that is carpentry under the cabinet plus a plumber up top. Decide the mount before you buy the sink, not after. The hole in your counter already voted. Leonard "Chuck" Thompson, LC Thompson Construction Co.
What Pushes the Number Up
The $800 is a clean like-for-like replacement into the counter you already own, reusing the existing shutoff valves and the drain where it sits. A standard install counts on both of those staying put. The number climbs the moment they do not. An undermount going into a counter that has to be cut or re-supported adds hours. So does a heavy fireclay or cast-iron sink that needs new bracing under the cabinet, and a farmhouse apron sink, which alters the cabinet face and stops being a swap at all. Move the drain or the supply lines and you are paying for new plumbing, not a reconnection. Corroded shutoffs that crumble when the plumber turns them get replaced on the spot, and that adds time too. Swapping the faucet in the same visit adds about $477, and adding a disposer, a water filter, or an instant-hot dispenser stacks on more. A garbage disposal in particular rides along often, since it mounts right under the sink and the lines are already open. That work carries its own price, so have the bid break it out as a separate line.
What Changes City to City
| Metro | Average | Range | Crew labor |
|---|---|---|---|
| Atlanta | $783 | $693 to $881 | $89 |
| Austin | $791 | $689 to $886 | $93 |
| Phoenix | $792 | $700 to $893 | $104 |
| Denver | $837 | $744 to $972 | $107 |
| Chicago | $900 | $819 to $1,093 | $173 |
Atlanta to Chicago is about a $117 gap on the same job. The sink costs about the same in every one of these cities, so the spread is not the hardware. It is the plumber's loaded hour and the cost of running the company behind that plumber. Permits move none of these rows; a like-for-like swap pulls no standalone permit in any metro we track. Chicago is the row to study. Its crew labor runs $173 against Atlanta's $89 on identical hardware, and the overhead behind a Chicago plumber is priced in the same wage market. When the loaded hour rises, the whole number rises with it, hardware unchanged.
Frequently Asked Questions
How much does it cost to install a kitchen sink?
A standard kitchen sink replacement typically runs $715 to $934 for a like-for-like swap. The sink itself is the biggest slice of that, a bit under half, and it is the part you control most: a stainless drop-in sits at the low end, a heavy composite or fireclay basin pushes higher. The labor barely moves on a like-for-like swap, but the mount you choose decides whether it stays that way. A drop-in keeps the hours near the baseline. An undermount adds them. Swapping the faucet in the same visit adds about $477.
Drop-in or undermount sink?
A drop-in is faster to install and works on any counter, laminate or stone, because it rests in the existing cutout and the rim does the holding. An undermount gives you the clean edge with no lip, which makes wiping crumbs straight into the bowl easy, but it demands a solid surface like granite or quartz and has to be clipped and braced from below. That bracing is the extra labor. If your counter is laminate, the choice is made for you. If it is stone and already cut for an undermount, you have the room to pick on looks.
Does a new kitchen sink need a permit?
Often, no. A like-for-like swap that reuses the existing drain and supply lines counts as minor plumbing, and many cities do not require a permit for it at all. Some charge a small fee anyway. The reliable trigger is moving the plumbing: relocate the drain or the supply lines and you have crossed into work that most jurisdictions want inspected. Our figures carry no permit line for this job in any metro we track, because a straight swap does not pull one. If your project moves the plumbing, ask your city what the inspection costs before you sign.
When the quotes are in front of you, grade them against the data line by line with our kitchen bid checker before you sign.
Figures are the national project basis from TheFatBook Cost Index V3 2026 for a like-for-like kitchen sink replacement. Metro rows reflect local wages and operating costs. Sources: Craftsman National Estimator BOM, BLS OES wages, verified permit fees.