Jobs belonging to the building — raised once, not once per flat.
A building's Maintenance tab is for a fault that affects everyone — the lift, the stair lighting, the entrance door — raised once for the block, not flat by flat.

Raise a building job starts one. Below sits the list of contractors who work on the building, by trade.
This is the one tab that works with no units attached yet — a block has communal parts from day one.