How below-grade plumbing works
Most older Union County homes have a sewer line that exits above the basement floor. That means a basement toilet and shower need either an ejector pit (cut into the slab) or an upflush system (no digging). We check your main line during the estimate and recommend the right one.
Half bath or full bath?
A half bath (toilet and sink) fits in about 20 square feet and handles a family room or office. A full bath with a shower is what turns a basement bedroom into a real guest suite, and what appraisers and buyers want to see.
What's included
- Slab cutting, ejector pit, venting, and all rough plumbing
- Exhaust fan ducted to the outside to control moisture
- Tile shower or fiberglass unit, vanity, toilet, and lighting
- Plumbing permit and inspections
Typical cost
A basement half bath typically runs $12,000 to $20,000. A full bath with a tiled shower runs $25,000 to $45,000, depending on how far it sits from your main stack.
Use the basement cost calculator →
Questions about basement bathrooms
Do I need an ejector pump for a basement bathroom?
If your sewer line leaves the house above the basement floor, yes. That's the case in most older homes in our area. We confirm it at the estimate.
Can you add a bathroom to a basement that's already finished?
Yes. We open only the walls and floor we need, add the bath, and patch and refinish so it matches.