Bathroom remodeling in Illinois is usually a small wet room inside an older house, not a blank plan. Plaster, a tight footprint, and a vent that dumps into the attic are the ordinary obstacles. Winter humidity becomes frost in the attic if the fan never reaches the outdoors. A slow leak at the tub shoe shows up on the ceiling below long after the drip feels normal. Start with the failure you can already name.
Tile over a mortar bed hides a pan that may already be tired. Vinyl and later surrounds fail at the seams, then swell the subfloor until the toilet rocks. A window over the tub is a cold pane and a rot risk when the sill stays wet. Galvanized supply lines can turn a fixture swap into an open wall. Say if the shutoff at the fixture actually stops the water.
Tell the call whether you are fixing a leak, replacing a fan, or reworking the room. Those are different jobs even when they share a door. If the ceiling below is stained, the bath is not a cosmetic subject anymore. If the fan vents nowhere, say whether the duct dies in the attic. A powder room on an exterior wall freezes differently from a full bath over a conditioned basement.
Illinois houses often stack the only bath above a kitchen or beside a stair, so the wet wall is spoken for. Moving a drain is a bigger decision than moving a mirror. Flooring has to tolerate a splash and a wet winter boot. Ventilation has to leave the building, not the top plate. If you share a stack, say so before a wall opens.
Name the town, the symptom, and whether water is moving right now. Leak, fan, or full rework is the fork in the call. Mention plaster if that is what will crack when the wall opens. A stained ceiling does not improve while you collect ideas. Call the number on this page.