Granted, in our part of the world, the water shut off can be in a location with difficult access such as a crawl space or behind the washing machine or buried in the yard. Regardless of its location its important to know. I have seen far to many basements turned into swimming pools.
If you don't know, find out; if you cant find it get help doings so or have one installed; it could mean the difference between a minor inconvenience and a major water damage catastrophe.
thanks for stopping by,