Read This Before You Redo Your Laundry Room

On the first floor
Pros: Near where most other house-keeping chores 
take place. May be able to share kitchen or powder-room plumbing lines.
Cons: Laundry can pile up in cooking, eating, and foot-traffic areas. Need to carry hampers upstairs. Machines hidden in cabinets require vented doors and clearance space for proper ventilation.