TroubleshootingUpdated July 12, 2026
Older homes in Lemont and the southwest Chicago suburbs often have just one bathroom, and families quickly feel the strain as households grow or schedules get busier. Adding a second bathroom sounds like a straight upgrade, but it's a project with hidden complications, especially with the unique mix of historic and newer housing stock in our area. The age and layout of many Lemont homes, plus our clay soils and high water table, demand careful, knowledgeable plumbing work to avoid damage or code violations.
Finding the Right Location
The first decision is where the new bathroom will fit. Basement corners, unused closets, and space near existing plumbing lines are typical candidates. In Lemont, many older homes have stone or brick basements and thick limestone or clay foundation walls, which make cutting new drain lines or vents a much bigger task. It's usually simpler and more cost-effective to situate a second bath close to existing supply and waste lines, like above or beside the main bathroom or kitchen, to limit the amount of demolition and complex pipe runs required.
Drainage and Sewer Challenges
Proper drainage is critical, nothing will shut down a bathroom project faster than inadequate slope or a poorly sized waste line. The original plumbing in homes built before the 1980s often relied on smaller cast iron or even clay tile main lines. These pipes can be partially clogged by decades of buildup or even root intrusion from old landscaping. Before starting a remodel, our crew inspects the existing drain system, often with a camera, to check for signs of corrosion, cracks, or old repairs that could collapse under new pressure.
Given Lemont's heavy clay soil and frequent freeze-thaw cycles, we watch for slow-moving drains and puddling around exterior cleanouts, signs the main line may need hydro jetting or even partial replacement. If you're tackling a basement bath, the main sewer may sit above the planned shower or toilet elevation, so adding a sewage ejector pump might be necessary to move waste up to the street line. For extensive drain work, it's smart to review our sewer line services and drain cleaning options to see what's involved.
Water Supply Considerations
Next, we look at the water lines. Historic Lemont homes commonly still have galvanized steel supply lines, and these can be badly corroded or restricted. Adding a bathroom increases demand, so we check the main and branch supplies to be sure there's enough pressure and flow to handle a second shower or sink. Sometimes, partial pipe repair and repiping is required to prevent slow fills or erratic temperatures. Modern code generally calls for copper or PEX, especially in new additions. Don't forget the water heater: if your family already struggles with hot water running out, a second bathroom may run it dry faster. See our water heater services to plan any capacity upgrades.
Soil, Water Table, and Sump Systems
Lemont's clay soils and moderate to high water table make below-grade construction a challenge. Digging trenches for new waste or supply lines can open up the risk for seepage or foundation leaks, especially in homes without a reliable sump system. We often find old sump pits or pumps that need updating to keep basements dry during wet spells and heavy storms. If your second bathroom is headed to the basement, we recommend having our team assess your sump pump system before you break ground.
- Look for cracks or stains on basement walls or floors before construction starts.
- Test your current sump pump and check valve for reliable operation during heavy rain.
- Check for musty odors, as they often point to past water infiltration.
- Plan for a backup power source for the sump pump if the area is prone to outages.
- Install drain tile or a waterproof membrane if adding a bathroom to a frequently damp area.
Fixtures, Vents, and Final Touches
Once the rough-in work is mapped out, selecting fixtures comes next. We guide Lemont homeowners through code-compliant options for toilets, showers, and sinks. Don't overlook the importance of proper venting, each new fixture needs a vented line to prevent slow drainage or sewer gas buildup. With the ongoing humidity from the river and canal, we also recommend high-quality exhaust fans to limit moisture damage and mold risk. Our faucet and fixture installation team can help with choices that fit older or newer homes equally well.
Permit Requirements and Inspection
Lemont's building department, like others in the Chicago metro area, requires permits and inspections for plumbing additions or major remodels. Skipping this step can lead to headaches if you ever sell the property. We handle proper permit filings and coordinate with local inspectors, making sure every drain, vent, and supply line is installed to local code. Common trouble areas during inspections include incorrect pipe slopes, missing cleanouts, or using old materials that no longer meet state standards. We always check for those before calling for a sign-off.
Planning a second bathroom takes real troubleshooting, especially in a town with as much old stonework and varied soils as Lemont. Our experienced crew works with these challenges every week. If you're ready to explore your options or need an honest assessment of what's possible for your home, call us at 331-246-0385 to get started. We'll help you plan a bathroom remodel that fits the quirks of your home and stands the test of time.