Howden-Chapman started her career in secondary-school teaching, before moving to clinical psychology, and then public health. She has conducted a number of high-profile randomised control trials into various aspects of housing and health, in the process helping to build the evidence base for the later New Zealand-wide insulation programme. Howden-Chapman's Healthy Housing group conducted an analysis of the Warm Up New Zealand: Heat Smart programme which showed that overall it "will have a net benefit of $951 million dollars, and a highly favourable benefit cost ratio of 3.9:1." Howden-Chapman was a member of the 2012 Expert Advisory Group on Solutions to Child Poverty, which outlined a number of policy recommendations to tackle child poverty in New Zealand. In November 2013, Howden-Chapman was made a fellow of the Royal Society of New Zealand. In December 2014, Howden-Chapman and her research programme were awarded the $500,000 Prime Minister's Science Prize. She was the first woman and the first social scientist to win the prize. Howden-Chapman is the current chair of the WHO Housing and Health Guideline Development Group. She is also director of He Kāinga Orana, the Housing and Health Research Programme examining the link between housing quality and health, based in the University of Otago, New Zealand. With a strong interest in reducing inequalities in the determinants of health, Howden-Chapman's research aims to identify and evaluate housing-related interventions to improve individual, family and community health. Her research has had a major influence on housing, health and energy policy in New Zealand. Howden-Chapman was named the Supreme Winner of NEXT Woman of the Year 2018 for her advocacy for healthy, warm and dry homes in New Zealand. In October 2019, Howden-Chapman was appointed one of seven inaugural sesquicentennial distinguished chairs, or poutoko taiea, at Otago University.
Selected publications
Howden-Chapman, P. & Penelope Carroll . Housing and Health. Steele Roberts.
Howden-Chapman, P., Stuart, K. & Chapman, R. . Sizing up the City: Urban Form and Transport in New Zealand. Steele Roberts.
Bierre, S., Philippa Howden-Chapman & Lisa Early . Homes People Can Afford: How to Improve Housing in New Zealand. Steele Roberts.