It looks like you have structures from two distinct dates. The part on the right appears to be the older, original building, done in the Arts & Crafts style. This would correspond to the 1914 date you found. It is hard to tell when the part to the left was added, but the mismatched roof lines and the corner intruding on what would have normally been a symmetrical facade on the original building are a clear indications that part was added later.
Hope this helps.
Michael