As far as I can tell, rentable square feet (total) per building footprint sqft goes up with height, just sub-linearly. Until adding more height is technically

As far as I can tell, rentable square feet (total) per building footprint sqft goes up with height, just sub-linearly. Until adding more height is technically infeasible or decreases total projected profits (whether that's due to decreased profits/sqft, or not enough demand to fill a taller building, or both), developers in land-constrained areas like city centers will build taller buildings. (Land-constrained, as in, when buying two equivalent lots and building half-height buildings becomes less profitable than building a skyscraper or supertall, due to massive demand for high-floor views, combined with sky-high nearby lot prices.) Point of trivia: apparently there are terms for each 100m of height: Lowrise -> Highrise -> Skyrise (Skyscrapers) -> Supertalls.