[spjwebster]

A well-known UK startup, renting an old building just outside of London, is (or was, as of a few years ago) paying square footage cost for an entire floor that doesn't exist. The previous occupants - a government department - had the floor removed to make for higher, grander internal ceiling heights.

[Nasrudith]

Sounds a bit quirky but makes some sense as a reckoning if 'footage' assumes a standard height.