A new study has put a figure on the amount of money which modern energy-efficient features can save occupants of a newly-built home.
A family occupying a house built to current standards should save at least £1,400 a year compared to an identical family living nearby in a similar-sized Victorian-era house.
The gap between the figures, compiled by the National House Building Council (NHBC) and Zero Carbon Hub, is likely to widen further, say researchers, as a result of new standards for home energy efficiency and carbon emissions which will come into force in 2016.
The research has projected the typical cost of energy for all uses in various sizes and types of house.
Among its conclusions is that a newly-built four-bedroom detached house is likely to be as much as 57 per cent cheaper to run – a saving of £1,410 – than an equivalent Victorian era house which has been modernised.
Similar levels of savings are also possible in end- and mid-terraced houses. And the occupant of a one-bedroom flat built to the latest standards is likely to be spending as much as 47 per cent less on their energy bills than someone in a similar older property.
The researchers assumed that the updated older home would have 200mm of loft insulation, half of its windows were double-glazed, it was fitted with a non-condensing gas boiler, and had a lagged hot water tank.
"Given the recent price hikes announced by the energy suppliers, which average 8.1 per cent, we believe our calculations could be ‘on the conservative side," said an NHBC spokesman.