In Oblivion (specifically the Remastered version), Agarmir is reliably out of his house only on weekend mornings.

Exact time Agarmir is not home

Players have tested and documented that:

  • Agarmir only leaves his house on weekends :
    • Loredas (Saturday)
    • Sundas (Sunday)
  • On those days, he leaves his house at about 8:00 a.m. game time.
  • That is the window you can safely use to slip into his house and investigate during the “Unfriendly Competition” quest.

One video guide explicitly states that 8:00 a.m. on Loredas or Sundas is the only time he will leave his house , making that your best and most consistent opportunity.

Practical tips for the quest

  • Wait or sleep near his door until it’s just before 8:00 a.m. on Loredas or Sundas.
  • Watch him walk away, then pick the medium lock on his door to get inside.
  • If he “never leaves” in your save, double‑check that:
    • It really is weekend in-game time.
    • It’s at or shortly before 8:00 a.m.
    • You’re not in the middle of some bugged AI situation (reloading a nearby save often fixes that).

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.