Projections of population growth, together with the most recent assessment of development capacity, demonstrate that over the next 20 years, it will not be possible to meet the requirements of London’s growth within the Greater London boundary within existing planning policy constraints. Moreover the compact city concept on which the current London Plan is based has failed to meet London’s housing requirements over the last ten years. There is no governance structure for the planning of the London metropolitan region and the abolition of regional governance structures outside London has weakened the prospect of any metropolitan regional planning. The duty to collaborate provisions of the 2011 Localism Act have been shown to be an inadequate structure for planning the metropolitan region. This paper examines alternative development options for the London metropolitan region and considers alternative governance options for responding to the challenges of London’s growth.