I think we can turn our water off under the floor, but neither of us has actually seen the regulator (?) the plumber put under there.
Otherwise, we would have to turn ours off at the road and neither of us has ever done that either!
The night our bathtub faucet would not cut off, we had to call the water Dept!
I could cut off water under sinks and at the toilets, but none of the bathtubs have access without cutting Sheetrock.
We are much too incompetent to be home owners...
sigh.