I finished the Stormcloak and darkbrotherhood storyline and I still can't start that quest. Any Suggestions?

I have the same problem apart from I did the Imperial questline as well as the dark brotherhood questline. There is never any guard in the graveyard to ask about the murder. I've even pickpocketed the key to the house and gone in but even that didn't start the quest, so i've pretty much given up hope :/

I had this problem on one of my chars, and as far as i know there is no solution :/

The only way I have found to reliably complete this quest is to do it straight out of Helgen.
That way the game will not have amassed many variables yet that can muck things up.
Im afraid that if youre as far as having completed the civil war, youre stuck with not being able to do it.

In my case ... pickpocketing the key from Tova and going into the house triggered this quest. Try it and see how it goes. As far as I know that's the only workaround for this quest ( for Xbox 360). Good luck!

With 3 chars I was never able to buy Hjerim, completed quests in different order and stuff, never got the choice to buy the house.

Count the times you've been near Windhelm (there's also a globar variable). Be warned that the quest is triggered even by approaching Windhelm (not entering). if the corpse near the cemetery is not discovered when the quest triggers it is lost forever. On PC it's possible to get the house and clear it of the 'stuff' in it via console.

http://www.uesp.net/wiki/Skyrim_talk:Hjerim#GETTING_HJERIM_WITHOUT_INVESTIGATION_TARGETS_AND_NO_GLITCHES.21_.28PC_only.29

Don't be too worried, that house is too buggy to be of any use, it is more frustration then it is worth. Hopefully when/if Bethesda fix the bugs with the questline they will also fix the house!

Well, I'm having this issue for 5 months now and basically, it made me stop playing. I too was going for all the hoses and after reading a bit I concluded that the Windhelm house would best fit to my needs utility wise. At thistime I was lvl 50-52, had completed: dragonborn main quest, civilwar and went on imperial side, all words of power, had all houses available besides the one in WH, finished thieves guild and started nightingale quest chain as a nightingale but stopped before killing Nilsine or who the assassin optional contract target was due to a friend telling me that he did murder her and thus had read that you couldn't get tge house if doing so (witch by itself seemed to svck to me ...little did i know).

Also, before getting into detailed descriptions, I must say that Ive had this issue thru more versions of the game (i play on pc),updated from 1.something to 1.5+ or what the current version is atm. I have been in and out WH many times before attempting to trigger this quest, very late in the game as previously stated. The thing for me is thatI have the amulet, I pickpocketed the key, I broke into the house from pure curiosity and that led me to the internet ..as no quest triggered even on trying "investigate" inside. The new yarl made me thane but I cannot buy the house due to the standard "there have been some things happenin around that house and it's curently unavailable" text. All NPCs listed are up, even tho i cannot confirm the guard mentioned in the threads here. I have traveled my ass off in and out, spoke to everyone and everything, stalked ppl worse than the damn butcher himself. I thought maybe dropping the pending assassination quest might unblock whatever is blocked but I dunno how to do that, too bad there isnt such an option in the ui and be able to pick it up again later from the specific npc...

What I observed: sussana or what's her name ( npc that is supposed to die as 1st victim) doesnt leave candlehearth. (stalked her inside too, tried to attack her, thing that triggers another npc jumping in and bashing...her even more as she cannot die...immguessing thats good tho given my specific bug). She wont leave the inn damn it!

Another thing, I have seen Calixo stalk near the inn some times, but she just wouldnt go out. I repeat, I cannot start the quest, tried everything except console commands. What do you guise think? How can i make her leave the inn? This last house to buy so i can continue the assassin's guild chain but cant cuz im stuck thing simply made me quit and wait for a fix...a fix that never came . And no, id like to do it on my "main" char that ive cared for and loved from since he was a lvl 1 nobody (very much in love with this char ), any workaround will do!

Cheers, ty for the read and possible replies and gl.

Strange. Never had a problem with this quest. I know you have to enter Windhelm, then leave and travel to a different location, then back to Windhelm and do this three or four times before the quest will be triggered. Then you just have to go to the graveyard bit at night. I had five charaters and its never been a problem.

Like DemoNick I have never had a problem triggering this quest over my chars so I'm not sure what I'm doing differently. You have to enter at night I believe on the last visit to trigger it but with so many people having issues it seems sensitive to what ever you have done before.

I just had this problem and found a fix for it. It does contain spoilers from the DB questline.

I should add that most fixes in the patch are not retroactive, so people who purposefully shelved a character waiting for a major bug/glitch to be resolved have a chance that their saved games are still gltiched.