How much more Energy Efficient are new properties?

Better energy efficiency with greater sustainability and also money savings…

  • The majority of Ascent Homes properties have a B energy rating vs the average UK rating of a D energy rating*.

    *Rightmove 2024 data

  • An average new build property emits 71% less carbon* than the average older property

    *The House Building Federation

  • New build homes are constructed using new technologies and materials, and are built to ever evolving regulations

  • Save on average around £1,685 a year* in energy bills compared to owners of existing properties.

    *Zoopla, 2024

  • On average, a new-build house uses 67%* less energy than older houses

    *The House Building Federation

  • Regulations on Biodiversity Net Gain (BNG) mean developers contribute to the recovery of nature and wildlife habitats as a condition of planning permissions

It's common knowledge that new builds are more energy efficient, boast lower running costs and have smaller carbon footprints than older properties but why and by how much? We take a look.

Why are new properties more energy efficient than old ones?

While 5% of older homes boast an energy efficiency rating of A or B, 86% new-builds do*. This is due to:

Higher construction standards, using modern building techniques

Energy-efficient materials and designs, including well-placed windows for improved air circulation

Advanced heating systems, enabling only specific areas to be heated, reducing energy waste

Superior insulation, with loft insulation and double glazing retaining heat longer

Efficient water usage, cutting bills without reducing pressure

Low-energy lighting systems and energy-efficient appliances

 
 

How much more energy efficient are new builds?

Technological advancements make new builds up to 67% more energy-efficient than older properties. According to the Home Builders Federation (HBF), a new-build property produces 63% less carbon, roughly 1.39 tonnes of emissions per year compared to 3.52 tonnes from an older property.

What does this mean for homeowners?

The short answer is significantly reduced running costs.

New-build owners can expect their energy costs to be approximately 64% cheaper than owners of similar sized older properties, with the Home Builders Federation (HBF) reporting that the average new-build energy bill could be more than £150 a month cheaper. The savings rise to over £200 a month when comparing houses specifically.

For house hunters whose priorities are low running costs, energy efficiency and a minimal carbon footprint, an Ascent Home new build could tick every box.

* Home Buyers Federation, 2024