Some major obstacles remain in place, however, before cities can be imagined and planned in this way. In the twentieth century, governance structures were developed across the world (with Japan as a notable exception) that insistently kept dwelling apart from workplace. Housing and employment are regulated by separate ‘silos’,1 i.e. governmental departments that do not work effectively together. The UK departments of Work and Pensions, and Trade and Industry, with housing buried in Communities and Local Government, continue to be organized around mutually exclusive areas of concern.2 Their equivalents in the USA are Commerce, Labor, and Housing and Urban Development. These bodies generate rigid webs of rules that determine what sort of buildings can be built where, and how they can be inhabited. Barely acknowledging the existence of home-based workers or the buildings they inhabit, these regulatory frameworks are at best unsupportive and at worst punitive to this sector, despite its growth and modernity.