Hjerim

"Hjerim, the best house for the Nord"

Hjerim is a house in Windhelm, available for 12,000 gold, and 21,000 gold for full upgrades.

A part of the quest Blood on the Ice takes place here, although it is not required to have completed the quest before buying the house. In order to purchase the upgrades for the house, however, the quest must be completed. The quest is automatically gained when entering the house for the first time, if not previously completed. When completing the quest, talking to the Steward allows the Dragonborn to buy upgrades for Hjerim. Upon becoming Thane of Eastmarch, Calder is pronounced housecarl to the Dragonborn and lodges at Hjerim. Here is shown the house and its secrets.

Possible decoration packages:

It contains the following for item displays
See Windhelm Home Decorating Guide for more detailed descriptions.
 * 7 Walls displays
 * 4 Glass displays
 * 1 Weapon rack
 * 3 Mannequins
 * 4 Glass dagger displays

Bugs

 * Do not place ANYTHING in the blood spattered chest if you intend to purchase the Clean House upgrade. As part of the upgrade, the chest will be removed from the house, along with all the items inside it.
 * Sometimes the Weapon Racks, Wall Mounts will not work. Also sometimes the Displays will not work either, and will eat your items.
 * There is not a dialog option to buy upgrades from the Jarls aid.(will happen if you have not completed the quest that involves the house).
 * Sometimes the Jarls aid will say the house is unavailable and will never stop repeating. I personal called support for skyrim and they are having a patch Sunday Nov, 27 so hopefully this bug will be no more.
 * Ok, so I couldn't do the Blood on the Ice quest, not sure why but it was broke. But, straight to the point. I wanted Hjerim. By trying multiple things I found here, and other places, I managed to unlock the house, and am able to purchase decorations from the Jarls steward, house is unlocked. So far so good. This is what I did.
 * In some instances, even after purchasing the "Clean up the Murders" decoration from the Jarl's aid, the blood will still be present inside the house, and the secret room will be as it was, yet weapon plaques will still be added, and the bookshelf will be glitched in with the sacrificial altar.