In the second part of our look at the case for higher density housing, Ideas talks to Jane Quigley one of the people behind the Viva Housing project that has just been shortlisted in Christchurch's Breathe - Urban Village Competition; Jukka Noponen a Finnish planner behind an energy-efficient housing project; Brady Nixon who is developing Auckland’s Vinegar Lane project; and the Auckland Council’s urban design specialist Ludo Campbell-Reid.