Sometimes cats will out of the blue start peeing in oher areas of the home because,
There ticked off about something (A change in the home)
Or they are ill, likely a Bladder infection.
Signs of a bladder infection are traces of blood, dicolouring, and sometimes a different smell. Also teh cat may cry when trying to urinate, or just discomfort. And they usually do it on cold surfaces like tile floors (but not always).
How many cats do you have?
Some cats don't like useing the same litter box as another.
Is the litter box clean?
My cat always peed in our plants when i was a kid anddidn't clean out his litter box LOL...
What sex is the cat? is he or she altered?
And what do you feed them.
Use a product like Natures Miracle to elimininate the odar which keeps the animal going abck to the same area to urinate. Even if you clean it with a household cleaner and'you' can't smell it, they still can and it attracks them back.