The rats can be seen hanging on hand-towel holders, squirting toothpaste, running on toilet paper, squirting soap and using the toilet.
One can even be seen marking down the days in lockdown with red lipstick in the reflection on the mirror.
Fans were stoked that the artist shared his new masterpiece.
"Just made your restroom worth more than your whole house," one person commented.
Meanwhile, another person added: "We'll try not to rat you out."
Banksy has painted rats in the past across England with phrases such as "Because I'm Worthless" and "Our Time Will Come" to show a message that graffiti will constantly reappear, just like the rodents.
The rat imagery was inspired by French graffiti artist Blek le Rat.