Kitchen Plumbing Cost: Remodels, Sinks, and Installations
Kitchen plumbing costs range from $175 for a sink swap to $3,500 for a full remodel rough-in. Here's what drives the price on the most common kitchen plumbing jobs.
Quick Answer
Kitchen sink replacement costs $200–$500. Adding a kitchen island with plumbing runs $800–$2,500. A full kitchen remodel plumbing rough-in runs $1,500–$3,500 for an average kitchen. The main cost driver is how much new pipe work is required.
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Kitchen plumbing ranges from simple fixture swaps (a quick afternoon) to full rough-in work for a remodel (2–3 days of labor). The cost depends almost entirely on how much new pipe needs to be run versus how much can be reused.
Kitchen Sink Replacement
Replacing a kitchen sink in the same location — same cutout size, same number of holes — is a relatively affordable plumbing job. A plumber disconnects the supply lines and drain, removes the old sink, and reconnects everything to the new sink. Typically takes 1–2 hours.
**Typical cost:** $175–$450 (labor only, not including the sink itself). Sinks range from $80 for a basic stainless model to $600+ for a farmhouse cast iron. Add those costs to the installation quote.
Moving the sink to a different location is a different project — it requires running new supply lines and a new drain rough-in. Budget $400–$1,200 for the additional pipe work, depending on how far the new location is from the existing connections.
Faucet Installation
A kitchen faucet swap is 45 minutes to an hour of work: shut off supply valves, remove old faucet, install new one, reconnect supply lines. The main complication is working in the tight space under the kitchen sink.
**Typical cost:** $150–$300 in labor. Faucets range widely from $80 to $500+.
Garbage Disposal Installation
Installing a new disposal where one already exists (same mounting assembly) is a 30–45 minute job. Installing a disposal where there was none before requires adding a dedicated electrical circuit (electrician) and a modified drain basket — more involved.
**Typical cost:** $100–$250 labor for like-for-like. $250–$500 if electrical work is also required.
Dishwasher Plumbing
A dishwasher needs a hot water supply line, a drain connection to the kitchen drain (via the disposal or a high loop under the sink), and a dedicated electrical circuit. If these connections already exist (replacing an old dishwasher), installation is simple — often done by the appliance company during delivery.
Adding dishwasher connections where none exist requires a plumber to tap into the hot supply and add a drain connection. **Typical plumbing cost:** $150–$350. Electrical circuit is separate.
Kitchen Island with Plumbing
Running plumbing to a kitchen island is one of the more complex kitchen jobs because it requires running supply lines and drain lines across the floor — either through the subfloor or through a finished floor in a renovation. Islands lack the wall access that makes plumbing other areas easier.
**Typical cost:** $800–$2,500 depending on floor access, subfloor type, and how far the island is from existing connections.
In new construction or during a gut renovation (subfloor exposed), the cost is on the lower end. In a finished kitchen where the floors aren't being disturbed, the cost rises significantly because the plumber needs to carefully access the subfloor.
Full Kitchen Remodel Plumbing Rough-In
For a complete kitchen remodel where walls are being opened, countertops removed, and the layout potentially changed, a plumber rough-ins new supply and drain lines for the new configuration.
**Typical cost:** $1,500–$3,500 for a standard kitchen (one sink, one dishwasher, disposal). Add $300–$600 for each additional water feature (pot filler, second sink, ice maker line).
Use our [kitchen plumbing cost calculator](/plumbing-cost-estimator) — select "Kitchen Plumbing" to get a detailed estimate for your region and complexity.
Ice Maker and Refrigerator Water Lines
Running a ¼" copper or PEX supply line from the nearest cold water pipe to a refrigerator location typically takes 1–2 hours. **Cost: $150–$350.** Usually requires drilling through one or two cabinets or walls.
Permits for Kitchen Plumbing
Like-for-like replacements (same sink location, same faucet) generally don't require permits. Anything involving new pipe runs — moving the sink, adding an island, adding a dishwasher connection where none existed — typically requires a permit. See our [plumbing permit guide](/blog/plumbing-permits-guide).
Common Kitchen Plumbing Mistakes
**Undersized drain for the disposal.** A garbage disposal should connect to a 1½" or 2" drain, not a ¾" line. Slow drainage or backups after a disposal install often trace back to this.
**Improper air gap or high loop on dishwasher drain.** Many local codes require a dishwasher air gap device (the small fitting on the back of the sink) or a high loop under the sink to prevent drain water from backing up into the dishwasher. This is code in most jurisdictions — not optional.
**Skipping the water supply shutoff valve.** Every appliance and fixture should have its own dedicated shutoff valve. If the plumber isn't adding one when installing a new appliance, ask why.
Read our guide on [what plumbers charge per hour](/blog/how-much-does-a-plumber-cost) to put these kitchen job costs in context with regional labor rates.