Here is how to get the House Hlaalu Stronghold at the Odai Plateau:
Once you've reached a high enough rank in Hlaalu, you can go to the Hlaalu
Council Building in Balmora and talk to Dondos Driler. He tells you that you
need two things to start the construction of your stronghold: a construction
contract and a land deed.
Getting the contract is easy, go to Ebonheart and talk to Duke Vedam Dren
(second floor of Grand Council Chambers) about it. He'll give you one as long
as you promise to be a good person and uphold the law.
Getting the land deed is a little harder. You need to go the the Hlaalu
vaults in Vivec and buy one at 5000 gold from Baren Alen.
Return to Dondos and he will give you directions to the construction site and
tell you to go and talk to the Orc foreman there. Return to Dondos and talk
to him. He'll tell you to wait a few days. Your journal will update later
telling you that the first stage should be finished.
You can talk to Dondos again, and he'll tell you that you need to contribute
to Hlaalu by including egg mining at your stronghold. Go to the Balmora Mages
Guild and buy a spell of Cure Blight Disease on Other from the Orc there, or
you can buy a scroll of Daerir's Blessing from Hetman Abelmawia in Gnisis.
Then, head to the Shurdan-Raplay Egg Mine, which is across the river to the
Southeast of your stronghold. This is your egg mine.
Run through the mine, avoiding the kwama inside, and get to the queen. Use
the scroll or spell on her, as she is blighted. Then leave. Head back to
Dondos, and he will want you to recruit miners.
You can find miners at Gnisis or Tel Aruhn. In Gnisis, go to the northern
part of the town and find Tansumiran, in the Tansuriran Cave Dwelling. He'll
agree to mine for you. In Tel Aruhn, go the the Underground, and find the
slave pit guarded by the Orcs. The male Dark Elf slave will agree to work
with you.
Return to Dondos, and he will order the phase two of construction.
Then, once you are Counciler or Grandmaster of Hlaalu, talk to Dondos again.
He will tell you to find someone to guard your stronghold against bandits.
Go to the Balmora Fighter's Guild and talk to Flaenia Amiulusus. She will let
you hire Fjorgeir, a mercenary, for 1000 gold. Hire him and head to your
stronghold. Talk to him, and you can choose to have him remain at your
stronghold and guard it or go with you to fight the bandits.
Now, go to the cave Zainsipilu. To find it, go south and slightly west from
the egg mine. Enter, and kill the eight bandits inside. Once they are all
dead, you can go back to Dondos and tell him about what you did and he will
give the order to build the last stage of the stronghold.
