Glarthir's House is located in Skingrad, and belongs to the quest starter of the Paranoia quest.
Obtaining the key
In order to get the key to his house, you can take part in his quest, or you can pickpocket his key. Barring the pickpocket attempt, you can obtain his key during his quest, in one of two ways:
- Telling him that no one is following him, which causes him to attack you.
- After being given the task to kill his enemies, tell the town guard about it, and wait for them to kill him.
Either way, you will end up with a corpse of Glarthir that you can pick clean, including the key to his house.
Furthermore. if you choose to kill glarthir after he has given you the list of people to kill, providing that you tell huim that people are spying on him, you will get the money, the key to his house and no bounty, this however alerts the dark brotherhood
House contents
Glarthir's House is full of several books that might interest you if you want to read up on the lore of the Elder Scrolls. For example, you will find the entire five volume collection of The Real Barenziah, ready for you to read. Also, in the wicker basket near the entrance to his home, you will find 800 gold pieces to fill your purse with. A trip to his basement reveals a hidden key under one of his plates, as well as the notes that some of the people in Skingrad might have alluded to, if you inquired about Glarthir. The hidden key opens the cupboard in Glarthir's bedroom, which holds several items that you might find useful.
Notes on Thieves Guild
When doing the quest Independent Thievery for the Thieves Guild, and you don't want to steal from a living person, Glarthir's House is a great place to "steal" items and fence them for fenced gold. Even though Glarthir is dead, it is still considered trespassing to enter his house, and so everything is considered stolen by the game.