A whole-house repipe in Illinois typically lands somewhere between $7,700 and $14,200 when it's a standard 1,800 sq ft place with 2 bathrooms on one floor, done in PEX. That is higher than the same job would cost at the national average, about $6,400 to $11,800, mostly because Illinois plumbers earn more. Illinois plumbers make roughly 29 % more than the US average, and a lot of the homes here are old enough to still have galvanized steel or polybutylene pipe in them. The call puts you through to a repipe company serving your part of Illinois, and it costs you nothing through this site.
Repipe prices for Illinois homes
The numbers below come from this site's calculator, plugged into the Illinois plumber wage. They assume a house with a crawl space, meaning the low open area under a raised floor. PEX is a bendable plastic water pipe, usually red for hot and blue for cold.
| House | Pipe | Estimated Illinois price |
|---|---|---|
| 1,200 sq ft, one bath, one floor | PEX | roughly $4,900–$9,300 |
| 1,800 sq ft, two baths, one floor | PEX | roughly $7,700–$14,200 |
| 1,800 sq ft, two baths, one floor | CPVC | roughly $8,900–$15,400 |
| 1,800 sq ft, two baths, one floor | Copper | roughly $11,300–$22,700 |
| 1,800 sq ft, two baths, one floor, sitting on a slab | PEX | roughly $10,000–$19,600 |
| 2,400 sq ft, three baths, two floors | PEX | roughly $9,800–$19,400 |
Bedrooms aren't part of the math, since repipe pricing follows bathrooms and square footage. Most 3-bedroom houses have 2 bathrooms.
After the repipe company looks at your house, it gives you one fixed price.
What puts Illinois repipe prices above the US average?
Labor runs about 70 % of a repipe bill, per Angi. The average Illinois plumber earns $44.91 an hour, while the national figure is $34.70. Only one state or DC pays its plumbers more than Illinois does, and that is why a repipe costs more here.
Run the typical two-bathroom PEX job of about 1,800 sq ft through the calculator with US-average labor and you land in the $6,400 to $11,800 range, against $7,700 to $14,200 here in Illinois. About 16,750 plumbers work in Illinois, and a single call reaches a repipe company that serves your area.
Old pipes common in Illinois houses
Housing here skews older than in most of the country. Half the homes went up by 1971, leaving Illinois 8th of 51 when states are ranked from oldest to newest.
- Galvanized steel: 37.3 % of homes here predate 1960, the era when this metal pipe was standard.
- Polybutylene: 19.7 % of homes date from 1980 to 1999, overlapping the polybutylene era of 1978 to 1995. Polybutylene was a plastic water pipe used in those years, and this site's pipe identifier can help you tell whether you have it.
- Kitec: that same 1980 to 1999 group also covers Kitec's early years, which ran from 1995 to 2007.
Homes dating to 2000 or later make up just 17.7 % in Illinois. Going by color and feel, this site's pipe identifier can pick out 8 pipe types, including each of the three above.
Slabs and other things that push the price up
A slab means a concrete floor laid right on the ground, with pipes running beneath or inside it. A slab can tack on an extra 30 % to 38 %, per Repipe Champions. Run the Illinois 2-bath house with a slab and the calculator returns roughly $10,000 to $19,600.
Copper runs highest among the three pipe choices, coming in around $11,300 to $22,700 on that same house. Permits run $50 to $800, per a national guide. That guide says quotes for identical work can differ by $2,000 to $5,000. The repipe company gives you a fixed price after it sees your house.
Is a repipe worth it?
When low pressure, discoloration, or leaks turn up in more than one part of the house, a repipe is usually worth it.
If that sounds like your house, call now. The call is free, it connects you to a repipe company in your area, and after it sees your house it gives you one fixed price.
Checking the plumber's license in Illinois
Plumbers here get their licenses through the plumbing branch of the Illinois Department of Public Health. Check your plumber there before signing anything, so you can confirm whoever handles your water lines is properly licensed.
Plumbing in Illinois: the state has its own code
Illinois doesn't follow any national model code for its plumbing. The state health department has its own Illinois Plumbing Code, which covers every remodel where old pipes get replaced. You may do your own plumbing if the single family home you live in is one you own. A state inspector, or a local office with a licensed plumber as inspector, checks the work. Any helper you hire has to be a licensed plumber.
In Illinois, about 9 in 100 people get water from a private well rather than a water system. That's below the national rate of around 15 percent.
Do you need to move out for a repipe?
Most families remain at home through the entire repiping process. For a one-story, two-bathroom PEX home, the calculator puts the job at two or three days; a bigger two-story place with three bathrooms runs three to five.
How this estimate is worked out
The calculator starts with the home's size and an installed price per square foot, blended with the typical price for that number of bathrooms. Copper or CPVC adds its own extra. Then the labor portion, about 70 % of the bill, gets scaled by how the Illinois plumber wage compares with the US average. Slab and second-floor extras go on last, and the total is rounded to the nearest hundred. Pay figures are Bureau of Labor Statistics numbers from May 2025, and home ages come from the Census Bureau's 2023 American Community Survey.
