Quote:
Originally Posted by pianowizard
Is it cheaper to build two 700-900 ft skyscrapers than one 1,200-1,500 ft supertall of the same total square footage? I would think the latter is cheaper than the former.
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It depends (it is generally cheaper to build two shorter towers), however the decision often actually comes down to leasable space. In a very tall tower, mechanical chases and elevator shafts eat up a lot of the floor space on the lower floors. So much so that it is usually more economical to build two shorter towers where more of the floor space throughout both can devoted to space the developer can sell.
However, residential towers aren't effected as much because they have much lower traffic within compared to commercial buildings. That's why we see those needle thin residential towers rising; they only need like 4 elevator shafts all the way up. Tall commercial buildings and hotels often need dozens of elevator shafts.