I get some bats under my soffits at the peaks and occasionally one will get into the attic. Must be squeezing in a super small crack. I'm planning on building a three or four chamber bat house nearby to give them a better place to hang.I caught a bat in my basement earlier this summer--was actually thrilled that they are making a comeback. Since then, I've noticed up to 3 flying around my house. Building a bat box is on my short list. They are cute in an ugly sort of way!
Back when people used to leave doors and windows open more frequently, we or a neighbor used to get one in the house, maybe once every few years. It was standard recommendation to get tested if you found one had been in your house overnight, while the family was sleeping.Be careful with them. A 21 year old in British Columbia had an encounter with a bat and swatted it. He ended up dying shortly after as the bat had rabies.