Selling a Lake Forest home? The sewer inspection comes first
The city has its own rule here, and it catches plumbing problems on the way to closing.
A city ordinance requires a Home Sewer Inspection when water billing is transferred on the sale of a single-family home or duplex. The inspector checks downspouts, sump pumps and yard drains for connections to the sanitary sewer that should not be there. The city charges a set fee, a lower fee for re-inspection, and schedules the visit within 10 working days. Permits are needed before any correction work.
A sump pump that discharges into a floor drain is the classic failure, and it is a plumbing fix, not a paperwork one. We reroute the discharge, test the pump and check the lateral with a camera from our sewer camera inspection service so the repair list is complete before the inspector arrives.
Closing date close? Tell dispatch and we will find an early appointment when one is open.
Call (847) 281-8626An old core around a much newer ring
Lake Forest has 7,282 housing units in the latest Census estimate. About 18 percent, 1,310 homes, date to 1939 or earlier, and about 31 percent went up before 1960. Yet the median build year is 1976, because roughly 2,900 homes were added from 1980 to 2009. The result is two very different plumbing stocks in one city.
| Built | Homes | Typical first check |
|---|---|---|
| 1939 or earlier | 1,310 | Supply pipe material, drain stacks, shutoff age |
| 1940 to 1979 | 2,650 | Original copper joints, sump pits, aging heaters |
| 1980 to 2009 | 2,870 | Water heater age, valve seats, fixture supply lines |
With about 89 percent of homes owner-occupied, the person on the phone is nearly always the one paying for the fix. For houses of the oldest group we often recommend repiping in stages instead of chasing one leak after another.
How a Lake Forest backup visit runs
Phone triage
Dispatch, staffed around the clock, asks where the water is entering, whether a sump pit is full and where the main shutoff sits.
Stop the damage
We confirm the shutoff, pull standing water from the work area and make the electrical hazard safe.
Find the source
A camera and a flow test separate a floor drain problem from a lateral problem.
Price it out loud
You get the cause, the repair options and a clear price before any cutting or digging starts.
Permit check
The city lists plumbing, water heater and sewer permit applications, so we tell you what to confirm with the building department.
Ravines, bluffs and four inches in four hours
In the July 2017 storm, Lake Forest saw about four inches of rain in four hours, which the county estimated as roughly a 70-year event. The city says heavy stormwater can overload the sanitary sewer and push wastewater back into homes, and it names flushable wipes as a cause of blockages. It also recommends a battery-powered backup sump pump.
The city's ravine pages describe slope drains and retaining walls at Forest Park and restoration work at Seminary Ravine, so homes near the bluffs deal with moving water above and below the foundation. For repeated basement flooding the city offers a free consultation through Public Works, and we can handle the plumbing side through basement waterproofing once you know the cause.
Lead service lines: two estimates, one answer
Lake Forest states that its treated water and its roughly 168 miles of water mains carry no lead. Privately owned service lines are another matter, and the city's own figures vary. Its Water and Sewer page estimates about 400 properties may have a private lead service line, while an older FAQ said about 300 homes.
Either way, the homeowner owns the line. A permit is needed to replace it, and the city waives the permit fee. If you want to know what is coming into your basement, our water service line repair team can identify the material and quote the replacement.
What drives the cost of a Lake Forest repair
What changes the price
Every job here starts with a clear price. The numbers move on these points.
Call with the street name and what the water is doing.
Call (847) 281-8626Before We Arrive in Lake Forest
Before We Arrive
Close the main
Find the valve where the line enters the house and turn it clockwise. Open one low faucet to relieve pressure.
Quiet the system
No flushing, no washer, no dishwasher while a drain gurgles. The sump pit and the sewer both have limits.
Check the sump pit
If the pump has stopped and the pit is full, do not reach into the water. Tell us what you saw and we will advise.
Gather the paperwork
For a pending sale, keep the inspection notice or contract date handy so we can plan around it.
Lake Forest facts for your records
City systems behind the plumbing
Lake Forest runs its own Lake Michigan water plant, drawing from 42-inch and 24-inch intake pipelines, and it keeps separate sanitary and storm sewer systems. Sanitary flow goes to a treatment plant on Clavey Road operated by the North Shore Sanitary District, which bills treatment separately from the city's sewer charge. The city had 19,367 residents in the 2020 Census across 17.2 square miles.
The plumbing code the city adopted is the Illinois State Plumbing Code as modified by Chapter 150 of the City Code. Permit applications for plumbing, water heaters and sewers are filed with Community Development at City Hall, 220 East Deerpath. Ask them if your job needs one. Next door, Lake Bluff and Libertyville are on our dispatch map too.
Lake Forest plumbing FAQ
Lake Forest addresses use ZIP 60045, and we cover all of it, from the lakefront at Forest Park Beach and Sheridan Road past City Hall on Deerpath to the hospital area along Westmoreland Road.
Give dispatch the street address when you call and we confirm the route before the truck leaves.
Yes. Dispatch is staffed around the clock for burst pipes, sewer backups and heater leaks. Say whether the sump pit is full or the drain is rising, and we can start planning the call before the truck leaves.
Yes, nights and weekends are covered. When a slot is open we offer same-day appointments, and any after-hours charge is told to you before the truck rolls.
Yes. For single-family homes and duplexes, an inspection is required when water billing transfers on sale. It looks for downspouts, sump pumps and yard drains tied into the sanitary sewer. A re-inspection is available after corrections.
The city has a Water Heater Permit application, but its page does not describe every case. Ask the building department about your replacement, and we will walk through the steps with you.
The city says its mains and treated water are free of lead, but about 400 private lines may contain it by the city's current estimate. We can identify yours during a visit and plan the replacement.
Lake Forest on the map
A flooded basement or burst pipe in Lake Forest?
Call now. Dispatch is up all night, and the shutoff steps are in the prep list above.
Call (847) 281-8626