LEARNING CENTER WATER LINES
How much does it cost to repipe a house in Louisville?
The short answer
A whole-house repipe is genuinely job-specific, so it’s typically about $4,500 to $15,000 — a range, not a quote — because the price is built up from how many lines we run and how hard they are to reach. The building blocks are real, though: running new 1/2-to-3/4-inch PEX is $300–$400 for the first 10 feet plus under $100 a foot after, while copper is $500–$600 for the first 10 feet plus under $100 a foot — which is why PEX keeps a whole-house job thousands cheaper. A small one-bath home with an easy crawlspace sits near the low end; a larger two-story with several baths, finished walls, and a slab climbs toward the top. Run your home through Ask Goldie for a real figure.
A repipe means replacing the water supply lines running through your house — not the drains, the fresh-water pipes that feed your fixtures. It’s a big job, and the price reflects it, but most of what you’re paying for isn’t the pipe. It’s the labor to reach every line, run new ones, and put your walls back. Here’s the honest picture so the number makes sense.
What drives the price
This is one of the widest price ranges in plumbing because homes vary so much. Here’s what decides where yours lands.
- How many fixtures and bathrooms Every sink, tub, shower, toilet, and hose bib is a line we have to run to. A one-bath ranch has a handful; a home with three full baths, a kitchen, and a laundry has many more. More fixtures means more pipe and more labor — this is the first thing that moves the number.
- How hard the pipes are to reach This is the big one. A home over an open crawlspace or unfinished basement is far easier and cheaper than one where the pipes run inside finished walls and ceilings. If we have to open drywall to reach the lines, that access — and the patching after — is a real part of the cost.
- One story or two A single-story home keeps the runs shorter and simpler. A two-story means running lines up through walls to the second floor, which takes more time, more pipe, and more wall access. Stacked bathrooms help; spread-out ones cost more.
- Slab vs. crawlspace foundation If your supply lines run under a concrete slab, reaching them is harder than a home where we can work from a crawlspace below. On a slab, we often reroute lines through walls and the attic instead, which is a different approach at a different price.
- PEX or copper, and the drywall repair Modern PEX is flexible and faster to install, which keeps labor down: a 1/2-to-3/4-inch PEX run is $300–$400 for the first 10 feet plus under $100 a foot after. Copper costs more in both material and time — $500–$600 for the first 10 feet plus under $100 a foot — and across a whole house those per-foot gaps add up to thousands. And on any repipe where we opened walls, patching and repainting that drywall is its own line item. Some quotes include it and some stop at bare patches, so always ask what ‘finished’ means.
Do you actually need a whole-house repipe?
This is where we’ll save you money if we can. A repipe is the right call when the whole system is failing — not when you’ve had one leak. The honest test is the pattern. One pinhole leak in an otherwise-good line is a spot repair. Repeated leaks popping up in new spots, rusty or discolored water, and pipe you know is old galvanized or polybutylene — that’s a system at the end of its life, and that’s when a repipe pays for itself.
Louisville has a lot of older homes with galvanized steel supply lines that rust closed from the inside and start leaking once they turn, and some homes with polybutylene, a pipe that was pulled from the U.S. market after a major class-action settlement over failing fittings. When your whole system is one of those, patching one leak at a time just means you’ll be cutting into a wall again in a few months. Replacing it once beats paying for the same emergency over and over.
When a repipe is more than you need
We’ll steer you away from the big job when the situation calls for less:
- You’ve had exactly one leak A single leak in a sound, modern line is a spot repair, not a reason to repipe the house. Fix the one spot and watch it. A repipe is for a pattern of failure, not a one-off.
- The real issue is pressure or hard water Weak flow across the house is often a bad pressure-reducing valve or scale buildup at the fixtures, not the pipes themselves. Those are far cheaper to fix. Rule them out before committing to a repipe.
- Only one section is bad Sometimes just the original galvanized run to one bathroom is the problem while the rest of the house was already updated. In that case we repipe that section, not the whole home, and you pay a fraction of the full number.
Common questions we get
Why is the repipe range so wide?
Because homes are wildly different. The low end is a small single-story home with a couple of fixtures and an open crawlspace we can work from easily. The high end is a large two-story with several bathrooms, finished walls we have to open and patch, and a slab foundation. Same word, ‘repipe,’ but the amount of pipe, labor, and drywall work behind it can differ by ten thousand dollars.
How long does a whole-house repipe take?
Most homes are a few days of work, sometimes up to a week for a large or hard-to-access house. We stage it so your water is only off during working hours where possible, and the drywall patching adds time on the back end if walls had to be opened.
Should I use PEX or copper?
For most Louisville homes, PEX is the practical choice — it’s durable, flexible, faster to install, and it handles our hard water and freeze risk well, which keeps your labor cost down. Freeze risk is worth understanding before you choose: this is what actually happens when a pipe freezes. Copper is a fine material and some homeowners prefer it, but it costs more in both the pipe and the time. We’ll walk you through the trade for your home.
How do I know it’s time to repipe and not just repair?
Watch for the pattern, not the one event. Repeated leaks in new spots, water that comes out rusty or discolored, visibly corroded old galvanized pipe, or known polybutylene are the signs the whole system is done. A single leak on good pipe is a repair. We’ll tell you honestly which one you’ve got.
The next questions to ask
Not sure if you need a full repipe or just one repair?
Ask Goldie walks you through the warning signs and gives you a real ballpark in a couple of minutes. Try it at goldenplumbingky.com/instant-estimate/