Wiktionary
claim shanty
n. A house hastily built on a piece of land in order to legalize a claim to the land.
Usage examples of "claim shanty".
So I went back to my claim shanty and looked into the bean pot again, but it was still empty, and I went a-hunting wild onions.
Moira was saying, leading her through a home that made Gone With The Wind's Twelve Oaks look like a claim shanty.