If I had a big enough laundry room, why not? Sounds like a good spot for a quarantine tank, or for fry. Mine is just a laundry "space" behind bifold doors though .
If I put a tank in my laundry room I'd feel the urge to add carbon in my filters, not happening. It gets really humid in there and I feel like vapors from the laundry detergent or fabric softner may get into the tank water.