Old Building on Garden Valley Loop Road

What do you think this old building used to be? It sits in the back yard of a modern house looking very out-of-place. It is very tall and narrow. I thought maybe a school or church because of the area for a bell on top. It would be too small for a church I think, more like a one room school house. But it is built strange whatever it is. Any thoughts?

I don't do a lot of black and whites but this old building almost demanded it.