What kind of bird sleeps on your porch pillar every night?

A young owl has been sleeping on my porch column on the inner side every night. A few times I opened the door to check the weather out, and he would fly away. But he would fly back when I went back in house. Tonight I turned the porch light on first and slightly opened the door. He turned his head around to me and it was a very young owl. I quickly shut the door and turned light off so he would not scare away. On my porch floor under where he sits at night is a lot of bird yuppy all over the porch ground. LOL He has been there several weeks now.