The Old Building Key is a key item in Resident Evil 5.
The key is used on a building with a blue door and a Ithaca M37 Shotgun on the inside.
It is found after doing a partner assist action on the second broken ladder in the chapter. Once the assist is done it will either automatically be found by the computer, if in single player, or with two players it can be found on a cabinet on the far northwest side of the building that can be entered.
- ?, ed (2010). BIOHAZARD 5 kaitaisinsho Revised Edition. Enterbrain.
- Davis, H. Leigh, ed (2011). Resident Evil Archives II. Translated by Elizabeth Ellis. Indianapolis: BradyGames. ISBN 0744013216.