Plumber in Chicago: Basement Backups, Lead Service Lines and 2026 Prices

What plumbers charge in Chicago

We start from national cost data and apply Chicago's construction cost factor of 1.2 from the U.S. Army Corps of Engineers Area Cost Factors. Put simply, a repair that costs $1,000 in an average US market runs about $1,200 here.

Estimates for 2026, including labor and standard parts. Chicago prices use the metro's construction cost factor of 1.20 (US average = 1.00) from the U.S. Army Corps of Engineers Area Cost Factors. Your quote depends on access, materials and the condition of the home.

Angi's Chicago data lines up with the low and middle rows of that table. It reports an average plumbing job of $356, with most homeowners paying between $202 and $535, and puts the low end at about $100 and the high end at about $900 (Angi). Angi also notes that emergency rates climb in winter, when frozen pipes keep every shop busy.

What moves a Chicago quote up:

• A two-flat or a three-flat, where the plumber has to trace which unit a line serves before shutting anything off
• Old galvanized or cast iron pipe that crumbles when a fitting is loosened
• Work that needs a city permit, since the permit fee and inspection visit go on the bill
• Basement access through a narrow back stair, or a finished basement where drywall has to come down

The calculator below uses the rate for your ZIP code. For national prices and how plumbers bill, see our plumbing cost guide.

Who is allowed to do plumbing in Chicago

Inside the city, a state license is not enough to work on your pipes. That is the first thing to check when you call around.

Inside the city limits

Anyone doing plumbing work in Chicago needs a City of Chicago plumbing contractor license, with one exception for minor repairs by an owner on their own property. A plumber licensed by the State of Illinois still has to get the city license before working in Chicago. To hold it, the business posts a $20,000 performance bond with the City Clerk, at least one owner or officer must be a City of Chicago licensed plumber, and everyone on the crew must be a licensed plumber or apprentice employed by the company (City of Chicago). The license costs $150 a year.

If you own and live in a single-family home, you may do your own plumbing. It still has to meet the Chicago Plumbing Code and pass inspection, and you may not hire anyone other than a licensed plumbing contractor to help.

In the Illinois suburbs

Outside the city, the Illinois Department of Public Health is the licensing body. A plumber needs at least four years as a licensed apprentice plus coursework and a state exam, and any licensed plumber who works for others must register as a plumbing contractor each year and carry liability and workers' compensation insurance. Every plumbing ad in Illinois must show the license number. Leaving it off is a Class A misdemeanor with a possible $1,000 fine (IDPH). Naperville, Schaumburg, Evanston, Aurora and Joliet issue their own plumbing permits on top of that.

In Northwest Indiana

Gary, Hammond, Merrillville, Valparaiso and the rest of Lake and Porter counties fall under the Indiana Plumbing Commission. Indiana licenses journeyman plumbers, plumbing contractors and plumbing corporations, and a journeyman needs an approved apprenticeship or four years of trade experience before the state exam (Indiana PLA).

Why Chicago basements flood

Most of Chicago's sewers were built before 1930 as a combined system, meaning storm water from the street and waste from your toilet share the same pipe. The Metropolitan Water Reclamation District's modeling shows the system is overwhelmed after about two-thirds of an inch of rain in an hour (WBEZ). When that happens, pressure in the main pushes sewage back up the lateral and out the lowest drain in the house, which is usually the floor drain in the basement.

The July 2, 2023 storms showed how bad it can get. Between 3 and 7 inches fell across much of the city, and more than 8 inches fell on the far west side and in Cicero, Berwyn and Oak Park, according to the National Weather Service. The Deep Tunnel reservoir at McCook filled to capacity that month. A fourth reservoir adding 6.5 billion gallons of storage is due by 2029.

Ways to protect a basement

The cost figures come from Chicago-area plumbers interviewed by Angi in 2021, so treat them as a starting point and get current written bids. Overhead sewers cost more because walls and floors get opened up, but they keep working in a power outage as long as no one uses a basement toilet or washer. Exterior flood control systems need power to run their pumps and should be serviced regularly.

Chicago itself has no citywide rebate for these systems. Some suburbs do. Oak Park's Sewer Backup Protection Grant pays 50% of the cost, up to $3,500, for an overhead sewer or a backflow prevention valve system (Village of Oak Park), and WBEZ lists Wheaton and Morton Grove among other towns with cost sharing. Ask your village before you sign. Either system needs a plumbing permit and often an electrical one for the pump.

Lead service lines

If your Chicago house or two-flat was built before 1986, the pipe bringing water in from the street is very likely lead. The city counts nearly 400,000 lead service lines, mostly at single-family homes and two-flats (Lead Safe Chicago). The water mains themselves contain no lead, and the Department of Water Management adds corrosion control.

You can look up your address in the city's Service Line Inventory at SLI.ChicagoWaterQuality.org. Then check which replacement program fits:

The program details come from the city's 2025 Water Quality Report. Lead Safe Chicago calls a free replacement a $16,000 to $30,000 value, which gives a sense of what a private full replacement can run. Under Illinois law, a water system with more than 99,999 lead lines must replace at least 2% of them a year and may take up to 50 years, so waiting for the city could mean waiting a long time.

Lead can also come from old faucets, solder and interior pipes, so a new service line does not fix everything. If you are opening walls for another reason, ask the plumber to price the interior piping too.

Drain cleaning and the sewer line to the street

The pipe that carries waste from your house to the main in the street is called the lateral. It runs under the front yard and the city sidewalk, and on an old house it can be as old as the house. Repeat clogs in the basement floor drain are often the first sign of trouble out there.

The city shares part of this cost. Under Chicago's Private Drain Program, the city may repair a drain from a building of up to four units that has broken under the public way, which means from the city sidewalk to the center of the street, at no cost to the owner. You first hire a licensed sewer contractor to rod or video-inspect the line, and the contractor schedules a review by a city sewer inspector. Requests go through 311 (City of Chicago). Anything on your side of the sidewalk is yours to fix.

Chicago also requires a sewer permit to build, repair, adjust, rod or clean any underground pipe that carries storm or sanitary waste, on private property or in the public way. Ask for a camera inspection before you buy an older house or finish a basement. It shows breaks and roots before anyone digs.

Frozen pipes

O'Hare averages 121 days a year with a low at or below freezing, and 43 days when the temperature never climbs above 32°F, based on National Weather Service normals for 1991 to 2020 (NWS). The city's record low is minus 27°F, set in January 1985.

Pipes that freeze are usually the ones in an exterior wall, an unheated back porch enclosure, a crawl space under an addition, or the kitchen of a top-floor unit with a cold attic above. Before a cold snap:

1. Disconnect garden hoses and shut the inside valve that feeds each outdoor spigot
2. Open the cabinet doors under sinks on outside walls
3. Keep the heat on in a vacant unit of a two-flat, and check it
4. Find the main shutoff, usually in the basement, and make sure it turns

After a thaw, walk the basement. A pipe that split in the cold often starts leaking only when the ice melts.

Do you need a permit?

In Chicago, small repairs are exempt and most replacements are not.

The exemptions come from the Department of Buildings' list of work that needs no permit, and the fees from the city's stand-alone permit fee table. Most repair and replacement plumbing goes through the online Express Permit Program. The application needs at least one photo of the existing condition and an energy and water efficiency compliance form. Condo owners also need a letter from the association approving the work, even for work inside their own unit (Express Permit, plumbing).

Owners who are 65 or older, have lived in the building for at least 10 years and have household income at or below 80% of the area median can ask the city to waive the permit fee for a building of one to three units. Ask before the fee is paid.

Suburban towns and the Indiana cities run their own plumbing permits. The Illinois Plumbing Code applies statewide, so the inspection standards are similar, but fees and forms differ.

Common Chicago plumbing jobs

If you are planning a bathroom while the plumber is there, our Chicago bathroom remodeling guide covers layouts and permits.

Areas we cover

GOLDGCP plumbers work across the Chicago metro in Illinois and Indiana:

• Chicago, from the North Side to the South Side
• Evanston
• Oak Park
• Schaumburg
• Naperville
• Aurora
• Joliet
• Northwest Indiana, including Gary, Hammond and Valparaiso

Enter your ZIP code to see plumbing prices for your area and whether a vetted plumber covers your street.