The cost of energy is a particular concern to people in Cardiff. Nearly two-thirds of people answering the Ask Cardiff survey said that they were very or fairly concerned about energy costs.

Nearly 25% of households in Cardiff are estimated to be in fuel poverty. A household in fuel poverty is defined as one that spends more than 10% of its income on fuel to heat the house adequately. The most vulnerable people in communities are more likely to be on low-incomes and experience fuel poverty alongside other forms of deprivation. Cold homes have been linked to more deaths in winter, respiratory illnesses and impacts on mental health, and can particularly affect children.