Britain’s homes are among the oldest and least energy efficient in Europe. Explore our interactive to learn five ways to cut your energy use—and your bills
are among the oldest and least efficient in Europe. After the cost of domestic energy tripled this year in the wake of Russia’s invasion of Ukraine, the government introduced a price cap for households that limits the average bill to no more than £3,000 a year until April 2024. This short-term fix to prices will cost the state about £40bn and, in part because the government is now partially footing household bills, it will soon launch a campaign advising how homes can save energy.
Take a typical semi-detached three-bedroom house with a floor space of around 100 square metres built in around 1900. Assuming it has not yet been modernised, it might have energy consumption of around 22MWh each year, which would cost about £4,000 at today’s prices. Such solid-wall insulation is disruptive to install and prohibitively expensive. Costs for insulating the walls of a semi-detached home vary from £8,500 to £12,000, and would save about £550 of energy a year in today’s prices according to the. That suggests a pay back period of 12-16 years. But around 65% of British homes have a vacant cavity-wall construction; insulation for a semi-detached home of this type costs about £1,200.
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