Not your house, garage or sheds. You can also make a bat house yourself. Install them AWAY from your house, in the darkest corner. Okay to install ON your UNattached garage, make sure there is no avenue INTO the garage, and try to keep the garage doors closed except when being used. Keep bats away from the house.
Bats suckle their young, just like other mammals.
They are successful, helpful animals, usually very unobtrusive. Most people don't realize it, but the air is alive with bats every evening, even in the winter. The echo location skills of insect-eating bats are legend. They can fly and avoid obstacles that you and I can't even see. They can overtake, capture and eat insects on the wing.