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For the quest Noise Off you have to locate Turosi Salvel. He owns a house which is empty and looks a bit plain, on the south/central side of town.
Report time: 2020.03.26 18:25:23 UTC
Content file: TR_Mainland.esm
Memory address: 0000015901E2D460
Cell: Port Telvannis, Turosi Salvel's House
Coordinates: -134.176 16.2795 31.469
It is locked and he never shows up there, which is potentially confusing. I'm not sure if he's intended to have two houses, or if this is just an oversight.