Players can purchase Hjerim from Jarl of Windhelm's steward, Jorleif, for 12,000 but only once they have joined the Stormcloaks. You may also purchase upgrades from him to furnish the house. The home also comes with the services of Calder as housecarl.
General removal of all bloodstains, bones and the sacrificial altar. Note: Do not delay when buying the clean-up service as it disappears permanently from the available options if you do not choose it before you have purchased all the other amenities. Unless you prefer your decor blood-splattered.