Hjerim is purchasable having sided with either The Empire or Stormcloaks. Once allied with the Stormcloaks, the Fort Neugrad mission must be completed before Jorleif will make the house available for sale. However, once Falkreath Hold has been given to the Imperial Legion as part of Season Unending, it may be necessary to liberate Hjaalmarch before Jorleif will make this house available. If The Empire is chosen as an ally, then the defeat of the Stormcloaks is required before it is available to buy.