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Any smaller than present and the bottlenecks become dominated by other factors. Commonly things such as: access to at least two emergency egress stairwells, a requirement for at least one window, the physics of being able to reach the entry door at all. As a counter example, hotel rooms are usually required to have a restroom but not a kitchen area. Yet they're often even larger than studio apartments. This is because the other safety, engineering, and other-units factors enforce requirements that make smaller units pointless. They might even create security management issues in the common space between units. If what you're really seeking is cheaper ways of housing more people, then generalizing the question and changing the variables being optimized (other than size, which most places, particularly in other countries, already do great jobs on). Offhand, the 'wave a magic wand and fix the rules' solution just limited to this problem space might include something similar to. Fireproof (no flammable materials in the building construction, build in furnishings etc) buildings only require 1 fire-shelter level egress path. 'better' elevators (less shafts / density; might go to a Wanka-vator / turbolift like loop system). Eliminate window requirements in favor of two independent paths to sources of fresh air / shelter in place points. With the above, the sort of smaller unit hacks that others (but not I) desire might include commons facilities for coffin-hotel things like a gym/pool lockerroom and shower, a common kitchen, etc. However my experience with shared amenities (E.G. rooftop BBQ grills) is that they suffer the Tragedy of the Commons. There's always going to be at least one person in a group that uses things improperly, or leaves cleanup to others, etc. In the case of shared lockerrooms that aren't rigorously cleaned this will also lead to communicable disease transmission. |