There is a lot we don't know about Jesus' father. We learn most about him from the Infancy Narratives from Matthew and Luke, and, as reported here earlier, we know he was a man of incredible faith.
We also know that, as a trade, he was a carpenter and a builder. But what exactly did he build? As Jesus' father, we can attest that he helped to build Jesus the man. Jesus likely learned a trade from Joseph, and, more importantly, likely learned lessons as to how a man sacrifices to take care of the ones he loves.
We don't know how or when Joseph died, but the legacy of the man he helped raise and mold has literally spread to all corners of the world.
An incredible builder, that St. Joseph.