UK new-build AC mandate proposed as heatwave deaths hit 2,700

The Liberal Democrats are calling for legislation to make air conditioning or equivalent cooling systems mandatory in all new UK homes, along with essential public buildings like schools and health facilities. The proposal forms part of a wider "climate ready" programme that also advocates for passive cooling measures, such as planting more trees in residential areas.

The policy intervention reflects a rapid shift in the UK's residential cooling market. Industry estimates indicate the number of UK homes with air conditioning has doubled in the past three years, reaching roughly 4 million of the country's 30 million-plus households. Consumer demand has spiked sharply, with polling commissioned by the Lib Dems showing 28% of people purchased a fan or air conditioning unit during recent heatwaves, while 26% reported feeling unwell or faint.

For the construction sector, a mandated build standard would represent a significant shift in specifications and costs. Gideon Amos, the party’s housing spokesperson, criticised the erosion of building regulations, stating that UK homes are now "among the smallest and hottest in Europe after previous Conservatives governments swept away minimum space standards." He argued that "air conditioning is becoming essential in UK homes."

The commercial and human costs of inadequate housing stock are mounting. A UK Health Protection Agency yellow alert for high temperatures is in effect until Friday across southern England, the Midlands, and Yorkshire, with London expected to reach 32C on Wednesday. Furthermore, England has seen just 5% of average rainfall in July, dropping to 1% in the south, elevating drought and wildfire risks that threaten property and infrastructure.

The physical risks to the economy and workforce are stark. An analysis led by Imperial College London found that heatwaves in May and June killed approximately 2,700 people, peaking at around 440 fatalities per day. The study concluded that more than 40% of these deaths would not have occurred without the 1.4C of human-caused global heating to date.

Tim Farron, the Lib Dems’ environment spokesperson, warned that inaction has a price. "With another heatwave on the horizon, the government must step in with a new plan that takes the onus off already-struggling Brits and commits developers to build homes fit for the future – insulated properly and equipped with air conditioning," he said.