Haafinheim is a medium sized player home located on the shoreline near the Solitude farms that has been created expressly for the purpose of the r/skyrimmods ‘build a home’ competition.
The house can be acquired by the player after a short quest that explains some of the story behind the house and why it is in its current condition when found by the player. Completing the quest will tidy up the house and transfer its ownership to the player, at which point they can take up residence.
The mod has been created by several members of Archon Entertainment, the team behind Luftahraan, partly for a chance to get something released on the long road toward completing Luftahraan, and partly as a bit of a break from the city.
