What to check before a plumber touches your sump pit, water heater or sewer line — written for homes in 60540, 60563, 60564 and 60565.
In Illinois, plumbers are licensed by the Illinois Department of Public Health (IDPH), not by the city. A shop doing plumbing for you must also be registered with the state as a plumbing contractor, and the state requires plumbing contractors to carry liability and workers' comp insurance.
Plumbing permits are handled by the City's Transportation, Engineering & Development (TED) business group and applied for through the City's Civic Access portal. Usually your plumber pulls the permit. Per the City's building-permit guide:
Work in the downtown historic district can carry extra requirements. Unpermitted work can surface at sale time. When in doubt, ask the City before the work, not after.
Most Naperville basements depend on a sump pump, and the worst plumbing calls here tend to come in the same few storm nights. A few local rules and habits are worth knowing before you hire anyone:
Read this first: these are rough, typical ranges for Chicago-suburb homes, meant to help you sanity-check a quote. They are not quotes, not a survey of Naperville plumbers, and not prices from any shop we list. Your price depends on access, finished vs. unfinished space, permits, parts and how urgent the call is.
| Job | Typical range | What moves the price |
|---|---|---|
| Service call / diagnostic | $75–$250 | After-hours and weekend rates; whether it's credited toward the repair |
| Rodding a clogged main drain | $200–$600 | Cleanout access, roots, whether a camera inspection is added |
| Sewer camera inspection | $150–$500 | Often bundled with rodding; ask for the video |
| Sump pump replacement | $400–$1,500 | Pump type and size, new check valve, pit condition |
| Battery backup sump system | $800–$2,500 | Battery size, combo vs. separate pump, alarm |
| Tank water heater replacement (40–50 gal) | $1,500–$3,500 | Gas vs. electric, venting, code updates, haul-away |
| Tankless water heater install | $3,500–$7,000+ | Gas line and venting changes, permit if it's a new type |
| Ejector pump replacement | $1,000–$3,000 | Basement finish, pit access, pump grade |
| Backwater / check valve on the service line | $1,500–$5,000+ | Inside vs. yard install, excavation, manual vs. automatic |
| Overhead sewer conversion | $8,000–$20,000+ | Finished basement, excavation, pump and pipe runs |
| Water or sewer service line replacement | $5,000–$15,000+ | Length to the main, trenchless vs. open trench, restoration |
If a quote is far outside these ranges, that isn't automatically wrong. Ask what's driving it. A good plumber can explain the number in two sentences.
Per the City's permit guide, a like-for-like (in-kind) replacement doesn't. A new water heater, or one that changes power source such as gas to electric, does. Confirm with the City before work starts.
Use the IDPH plumber license search. Plumber licenses start with 058- and plumbing contractor registrations with 055-. Illinois also requires plumbing ads to show a license number.
The City Water Utility, at (630) 420-6137. They check the main at no cost. If the main is clear, you'll need a licensed plumber for your own line.
No. Discharge outside, at least 10 feet from the house, toward a swale or storm inlet. Not into a floor drain, the sanitary sewer, the sidewalk or the street.
Tell us the job and your zip. We write back with one Naperville plumber. Free for homeowners.
One name when you need the work. Not a pile of quotes. Not three trucks calling you the same afternoon.
If they waste your time, we replace them. If we don’t have a plumber seated yet, we say so — we don’t invent a shop.
Active leak or sewage in the basement? Shut off the water at the main valve first, and for a floor-drain backup call the City Water Utility at (630) 420-6137.
One seat per trade. The homeowners who read this page get one plumbing name — if you want it to be yours, see how seats work.