The housing sector is one of the main sources of CO2 emissions in OECD countries, accounting for over a quarter of the total. Robust and rapid action is required to reach the net zero emission target by 2050. Decarbonising housing involves halting the use of fossil fuels in homes, ensuring that electricity is generated from carbon-free sources, using high-energy-efficiency appliances and heating systems, ensuring effective insulation and encouraging behavioural changes. This paper discusses which policy instruments can prompt this transformation of the housing sector, ranging from carbon pricing through energy labelling requirements to green housing finance.