I was able to get a house free of charge by completing the side missions."March of the Dead"
and "served cold"
: As stated in the comments below you seem to be required to have done the side mission "Final Descent"
in Raven Rock mines before being able to start Served cold. Thanks again to EvilResidentUK
In order to get March of the Dead you have to go to Old Attius Farm
(I was out wandering for the locations achievement at the time). It is roughly south of Raven Rock town, which you start in, located just left of a mountain range (Making the farm roughly in the middle between raven rock and the bottom of the island).
There you will encounter a Guard captain who is fighting spawn and you will have to help. After you help him, talk to him and he will ask you to investigate the spawn and the farm and if you find anything to let him know.
(I found a note on one of the bodies.)
This will continue the mission (that is relatively a short side quest) that upon completion will have you go back to the Captain, now situated in Raven Rock, who will tell you that "Adril Arano"
wishes to speak with you. * (See below for how to start Final Descent if this does not happen)
Go and talk to this person (they are in Raven Rock too) and it will unlock Served cold. Make your way through this side quest and once completed you will be awarded a house which pops the achievement.*EDIT:
How to Start Final Descent -
I did this mission when on the mission from the Blacksmith to get his Axe back (which is linked to the Stalhrim Crafter achievement) as it required me to go into the mines to talk to Crescius
Regardless the mission is in Raven Rock mines, located in the north part of Raven Rock if I remember rightly, upon entering you will see two people arguing. Talk to "Crescius"
to start Final Descent.
commented with this walkthrough. http://geekitdown.com/the-final-descent-walk-through-skyrim
for anyone having trouble getting the mission to start via Crescius. It appears finding and searching the remains of Gratian Caerellius.
in the mines will get you the quest too. Edit 2:
For those curious about the bodies in the house you are awarded, user THRACE 462753
has commented that after returning to the house several days later, they had disappeared. User xBTCx Corrupted
has stated the bodies were gone as soon as they visited the house after being rewarded it.Also if you vote negative, will you please state why? I can't improve this and correct this if people do not tell me why they didn't like the solution etc.