Hla Oad is an out-of-the-way location, which can be reached by ship from Gnaar Mok, Ebonheart, and Vivec. Intervention spells will get you to the Balmora area. The only services offered here are at Fatleg's Drop Off, which is mainly a hideout for the Camonna Tong. Since the Tong are fairly hostile towards outsiders, you're not likely to get good service from them. The houses are all small and fairly poor, with almost nothing of value to interest a potential thief. All in all, this is not one of the more attractive places to set up shop.
Services
Fadila Balvel's House
Storage: 4 Barrels, 1 Chest, 1 Crate, 3 Sacks
Occupant(s): Hrondar Highlander. (Fadile Balvel can be found wandering outside.)
Description: One of the larger houses in town, but that's not saying much. About the only thing of interest in here is a copy of A Dance in Fire, Chapter 1, an Acrobatics skill book. The owners of this homestead are both completely unimportant.
Murudius Flaeus' House
Storage: 2 Barrels, 1 Basket, 1 Crate, 5 Sacks
Occupant(s): Murudius Flaeus
Description: This small shack on the south dock is the home of Murudius Flaeus, who owes some money to House Hlaalu. Look for a copy of Charwich-Koniinge, Volume 2, a Hand-to-hand skill book, on the one table in this tiny house.
Okur's House
Storage: 3 Barrels, 1 Chest, 8 Sacks
Occupant(s): Okur
Description: This medium-sized shack is the home of Okur, an Argonian woman with a sense for restless spirits. You'll need to visit her for the Imperial Cult. Her house contains almost nothing of value, so there's not much reason to visit here other than for the quest.
Relien Rirne's House
Storage: 2 Barrels, 1 Chest, 2 Crates, 4 Sacks
Occupant(s): None (Relien Rirne wanders around outside.)
Description: This small shack on the north dock is the home of Relien Rirne, though she is always found outside of it. It is the only house in town with a lock on its door (20 points), but there is no key. There's fairly little of value inside, however, so it's not really worth the effort to break in. You'll mostly just find common ingredients and not much else of use.
Shurkul gro-Sharga's House
Storage: 2 Barrels, 1 Crate, 5 Sacks
Occupant(s): Shurkul gro-Sharga
Description: Shurkul gro-Sharga lives in this small shack, an Orc pauper so poor he can't even afford a shirt. As expected, there's little of value here, even less so than the other houses in town. There's pretty much no reason to visit here.