Remodeling your kitchen is one of the most impactful home improvements you can make — and the plumbing is a big part of the budget. Whether you are swapping out a sink, adding a garbage disposal, or relocating supply lines for a brand-new layout, understanding the costs upfront helps you plan smarter.
At Golden Plumbing, we handle kitchen plumbing remodels across Louisville, KY every week. Here is an honest breakdown of what Louisville homeowners can expect to pay in 2026.
Kitchen Plumbing Remodel Cost at a Glance
| Project | Typical Cost Range |
|---|---|
| Kitchen sink replacement (same location) | $300–$800 |
| Garbage disposal install or replace | $150–$400 |
| Dishwasher hookup or replacement | $150–$350 |
| Ice maker or fridge water line | $150–$300 |
| Gas line for stove or range | $300–$800 |
| Relocate sink or dishwasher (new location) | $800–$2,500 |
| Full kitchen plumbing rough-in | $2,000–$5,000+ |
These are real-world ranges based on Louisville-area projects. Your final cost depends on the scope of work, materials, and the condition of your existing plumbing.
Sink Replacement: $300–$800
Swapping an old sink for a new one in the same spot is one of the most common kitchen plumbing jobs. The cost depends on:
- Sink type — undermount, drop-in, or farmhouse styles each require different cutouts and mounting
- Faucet replacement — if you are upgrading the faucet at the same time, add $150–$350 for parts and labor
- Drain and supply connections — if the new sink has a different configuration, minor rework may be needed
If you are keeping the sink in the exact same location and the shut-off valves are in good shape, this is usually a half-day job.
Garbage Disposal Installation: $150–$400
Adding or replacing a garbage disposal is a quick upgrade that most Louisville homeowners love. The price includes:
- Basic unit (1/3–1/2 HP) — $150–$250 installed
- Mid-range unit (3/4 HP) — $250–$350 installed
- Premium unit (1 HP, batch feed, quiet) — $350–$400+ installed
If your kitchen does not already have a disposal, a licensed plumber will need to add electrical wiring and modify the drain, which can add $50–$100 to the total. Learn more about keeping your drains clear in our drain cleaning cost guide.
Dishwasher Hookup: $150–$350
Whether you are replacing an old dishwasher or adding one for the first time, you will need proper water supply and drain connections. Costs break down as:
- Simple replacement (existing hookups) — $150–$200
- New installation (run supply line, add drain connection) — $250–$350
Louisville building codes require a high loop or air gap on the dishwasher drain to prevent backflow — your plumber should handle that as part of the install.
Gas Line for a Stove or Range: $300–$800
Switching from electric to gas? Or moving your gas range to a new spot? A licensed plumber must run or extend the gas line. Expect:
- Short run (close to existing gas line) — $300–$500
- Long run (across the kitchen, through walls) — $500–$800
- Permit — Louisville Metro requires a gas permit for new gas line work; typically $50–$100
Gas work is not DIY territory. A leak can be dangerous. Always hire a licensed plumber — read more in our gas line repair cost guide.
Relocating Plumbing: $800–$2,500
Changing your kitchen layout often means moving the sink, dishwasher, or adding new water lines. This is where costs climb because the plumber needs to:
- Open walls or floors to reroute supply and drain pipes
- Ensure proper slope on drain lines (1/4 inch per foot)
- Tie into existing venting or add new vents
- Patch and repair after rough-in
Older Louisville homes — especially those in the Highlands, St. Matthews, and Shively — often have galvanized or cast-iron pipes that need upgrading during a remodel. If your pipes are old, consider a whole-house repipe while the walls are already open.
Full Kitchen Plumbing Rough-In: $2,000–$5,000+
A gut renovation or new kitchen addition requires a complete plumbing rough-in. This includes all supply lines, drain lines, venting, gas lines, and fixture connections. The cost depends on:
- Number of fixtures — sink, dishwasher, fridge line, pot filler, etc.
- Distance from main stack — farther means more pipe and labor
- Permit and inspection fees — Louisville Metro requires permits for rough-in work
- Existing conditions — concrete slab vs. crawl space affects access and cost
Compare this to our bathroom remodel plumbing cost guide — kitchens and bathrooms have similar rough-in scope but different fixture counts.
What Affects Your Final Cost?
Every kitchen is different. Here are the biggest factors that move the price up or down:
- Age of your home — Homes built before 1970 often need pipe upgrades (galvanized steel, polybutylene, or lead)
- Accessibility — Slab foundations cost more to work with than crawl spaces or basements
- Permits — Louisville Metro requires permits for most plumbing alterations; budget $50–$150
- Material choices — PEX is more affordable than copper; your plumber can advise on the best fit
- Scope of work — A simple swap-in-place costs a fraction of a full layout change
Should You DIY Kitchen Plumbing?
Some small tasks — like replacing a faucet or hooking up a fridge water line — are doable for handy homeowners. But for anything involving drain modifications, gas lines, or opening walls, hire a licensed plumber. Mistakes in kitchen plumbing can cause water damage, gas leaks, or code violations that cost far more to fix.
Not sure if your project needs a pro? Check out our guide on how much a plumber costs in Louisville to understand when professional help is worth it.
Frequently Asked Questions
How much does it cost to remodel kitchen plumbing in Louisville, KY?
Most kitchen plumbing remodels in Louisville cost between $300 and $5,000 depending on scope. A simple sink swap runs $300–$800, while a full rough-in for a new layout costs $2,000–$5,000+. Golden Plumbing provides free estimates so you know the exact cost before work begins.
Do I need a permit for kitchen plumbing work in Louisville?
Yes, Louisville Metro requires permits for most plumbing alterations — including adding new fixtures, relocating drain or supply lines, and running gas lines. Minor repairs and fixture replacements in the same location typically do not require a permit. Your plumber should handle permit applications.
How long does a kitchen plumbing remodel take?
A sink replacement takes 2–4 hours. A garbage disposal or dishwasher hookup is typically a half day. Relocating plumbing or doing a full rough-in can take 2–5 days depending on complexity. The plumbing rough-in often happens early in the remodel timeline so other trades can work around it.
Can I move my kitchen sink to a different wall?
Yes, but it is one of the more expensive changes in a kitchen remodel. Moving a sink requires extending or rerouting supply lines, drain pipes, and venting — expect $800–$2,500+ depending on the distance and your home’s plumbing layout.
Get a Free Kitchen Plumbing Estimate
Planning a kitchen remodel in Louisville? Golden Plumbing provides free, no-obligation estimates for all kitchen plumbing work. We serve Jeffersontown, Middletown, Fern Creek, Prospect, and all of the Louisville metro area.
📞 Call us today: 502-402-9967 or request an estimate online.