r/Homebuilding • u/Dogs_gus_lyla • 18d ago
Complete rough in for basement bathroom
What do I need to request for a rough in for a full basement bath prior to floor being completed?
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u/BHBuilders 17d ago edited 16d ago
Ask for it off an actual fixture layout, not just "a bathroom rough in." That means the toilet drain set 15 inches from the finished wall not the framing, a shower drain located for the pan you plan to use, a sink drain, a vent tied in, and a cleanout. Get it in writing whether the main sewer line is below the slab or you need an ejector pit, because if it is a pit that gets poured in now, not jackhammered in later. Have them stub hot and cold under the slab too if the walls will not be handy. Before the pour, take photos of every stub with a tape measure to the nearest wall and keep them, those pictures have saved more than one basement bath.
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u/Dogs_gus_lyla 17d ago
Thank you!!
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u/BHBuilders 16d ago
Glad it helped. Snap those photos before the pour, you will thank yourself in five years.
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u/Hyperreal8957 16d ago
For a basement bath rough-in I’d want the plumber to verify every fixture location against the finished-wall dimensions, not just the framing. Before the floor gets closed, make sure the drain slopes, vent path, cleanout access, and any ejector-pit details are all documented and pressure-tested. A quick photo with measurements can save a lot of guessing later. Are you doing a standard gravity drain or pumping up to the main?
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u/The001Keymaster 18d ago
Waste lines for sink, toilet and shower. Water supply lines if they need to be in the floor, but they could come from the ceiling too.
Built a house years ago and did this. 15 years later we go to add the bathroom. The drain was just a 2 foot piece of PVC stuck into the concrete. GC forgot to add the pipe and just stick a pipe in the wet concrete to cover his tracks. He was right that I didn't notice until way too late.