In a house basement how do you get a bat out of the basement
That's odd. Usually they like the attics. The safest way for you and the bat is to get some small mesh netting and hang from the beams. Hopefully the bats wings will get tangled up into it and you can then remove the bat.
Call the humane society maybe
Call an exterminator
my dad snuck up with a pillow case when one was sleeping in our house and trapped it and let it go outside..maybe you can do that? its not easy but its a thought cuz it is possible.