Why ask the owner in the first place. Its public information anyway. Google does not ask either.
If you just ask it without context, "today we'll close at 16:00" is a perfectly reasonable response.
But for mapping lots of POIs this is a PITA and doesnt scale. What if the owner declines? This is non-copyrightable info anyway.
Shall one ask house owners if one can map their address or their house' outline?