This report provides information about the way that nine ‘high growth’ councils in New Zealand estimate demand for housing and business land, and how they measure the development capacity available to meet that demand. The report summarises information provided by council officers and publicly available council reports and plans on the work carried out by councils to date. It also reflects the views of some participants about the adequacy of the information or how it is used; these are the personal views of interviewees, who are generally technical experts engaged in growth modelling at the moment, and do not necessarily represent the views of the councils they are employed by.