MaintenanceUpdated July 8, 2026
Most Morton Grove homes were built in the mid-20th century, back when one bathroom per household was standard. Today, families want more convenience. Adding a second bathroom solves a lot of daily headaches, but making this upgrade in an older home is rarely a simple job. Plumbing layouts from the 1950s or 60s were not designed with extra bathrooms in mind, and that creates challenges for drainage, water supply, and venting.
Why Older Morton Grove Homes Need Upgrades
Original plumbing in the area often uses galvanized steel or cast iron. Over time, both materials corrode from the inside, causing restricted flow, leaks, and odd water pressure issues. Old clay or cast iron sewer lines are common here and may be too small or damaged to handle bathroom additions, especially in houses with only a single stack or a limited venting system. If you are adding a bathroom in a basement or in a far corner of the home, these issues become more likely.
Our crew sees frequent problems from clay-rich soils and a moderate water table. That means wet basements and shifting foundations, both of which add risk when installing new drains and fixtures. Running waste lines through a slab or crawlspace often means working around these local soil conditions.
Planning Your Second Bathroom
Start by thinking about the best location for the new bathroom. Nearby existing plumbing is easier, but sometimes the extra bath needs to go on the other end of the house or in a finished basement. Every layout brings its own set of technical questions:
- Can the main drain and vent lines handle the extra load?
- Are the water supply lines big enough for another full bath?
- Do you have room for safe venting and proper drainage slopes?
- Will the floor and foundation support cutting or drilling for new pipes?
- Is there risk of flooding from the water table or heavy thunderstorms?
We always recommend checking the integrity of your main drain before any major plumbing remodel. If you have an older clay or cast iron sewer, a camera inspection may reveal root intrusion or cracks. Upgrading part or all of your drainage could be necessary. In some cases, our sewer line services catch problems before they become expensive headaches.
Addressing Water Supply and Pressure
Lake Michigan water is moderately hard, which leaves scale build-up in galvanized pipes and water heaters. If your supply lines are restricted, adding fixtures can make pressure problems worse. We often see the need for new copper or PEX runs to feed an added bathroom. Sometimes a pressure-reducing valve (PRV) is needed to keep things balanced, especially if you have expanded the plumbing beyond the original design. If you notice fluctuating water temperature, it could point to a supply line issue. Our pipe repair and repiping team handles these upgrades with minimal disruption.
Don't forget hot water. Older units, especially those serving only a single bath, may not have the capacity for two active bathrooms. Before you add big soaking tubs or spa showers, check that your heater can handle the demand. Our water heater services cover assessments and replacements if needed.
Drainage and Basement Concerns
Many homeowners want the new bath in a finished basement. Our area's flat terrain and clay-heavy soils mean slow drainage and a risk of seepage when it rains. Supporting a basement bathroom usually means cutting into the slab or setting up an ejector pump to lift waste water up to the main drain line. Proper backflow prevention is essential to keep sewer water from returning during a storm surge or local flooding.
If your basement already has a sump pit or a history of high groundwater, we strongly recommend checking the system before cutting into the concrete. Our sump pump services can help keep your basement dry while you expand the plumbing.
Ventilation and Fixture Choices
Adding a bathroom means tying new drains into the home's vent system. Older houses often have undersized or poorly placed vents, which can lead to slow drains or sewer odors if not updated. Rerouting or adding vents sometimes requires opening walls or ceilings, especially if the new bath is far from the main stack.
Today's fixtures use less water, but not all setups fit old supply lines or drain slopes. When we install toilets, sinks, or showers, we always check for compatibility with your plumbing materials and layout. Our faucet and fixture installation service ensures you get the look and function you want, without hidden surprises later.
Steps for a Successful Second Bathroom Addition
- Evaluate existing plumbing (supply and drain lines) for age and capacity.
- Plan fixture placement for efficient venting and drainage.
- Inspect the sewer line for damage or insufficient size.
- Address any basement moisture or flooding concerns, especially if building on a slab.
- Upgrade supply lines and water heater if needed.
- Install code-compliant vents and backwater protection.
- Choose fixtures suited for your water pressure and drain configuration.
We've handled second bathroom projects all over the north suburbs. If you're ready to plan yours or just want a site visit, our bathroom remodeling team can help you avoid common headaches. We troubleshoot problems before they become expensive repairs, and we know the local building codes.
If you live in Morton Grove and are thinking about adding a second bathroom, our crew is ready to help you make it work. We're always available at 224-537-0650 to answer questions or schedule an estimate.