As energy prices continue to fluctuate and sustainability becomes an increasingly important consideration, today's homebuyers are looking beyond location and layout. They also want to know how much it will cost to heat, power and maintain their home in the years ahead.
The good news is that modern homes are significantly more energy efficient than many older properties. According to the latest Home Builders Federation (HBF) 'Watt a Save' report, households living in a new build property spend, on average, £420 less on energy each year than those living in older properties. New homes are also around 21% cheaper to run, thanks to modern construction methods, higher insulation standards and energy-efficient technologies.
Whether you're buying your first home, upsizing or relocating, understanding what makes a home energy efficient can help you make a more informed decision. This guide answers some of the most frequently asked questions about energy-efficient new build homes and explains why they are becoming an increasingly popular choice for modern buyers.
New Build vs Older Homes: Energy Efficiency Comparison
Average annual energy bills
New Build Home: Around £1,574
Older Home: Around £1,995
Energy efficiency
New Build Home: Built to the latest Building Regulations
Older Home: Varies significantly depending on the age of the property
Typical EPC rating
New Build Home: Usually A or B
Older Home: Often C–E, depending on upgrades
Insulation
New Build Home: High-performance insulation throughout
Older Home: May require upgrading to improve thermal performance
Heating systems
New Build Home: Modern, energy-efficient heating systems including air source heat pumps
Older Home: Older boilers and heating systems may be less efficient
Windows
New Build Home: High-performance double or triple glazing
Older Home: Older glazing may allow greater heat loss
Running costs
New Build Home: Typically lower due to improved efficiency
Older Home: Often higher because of reduced energy performance
Maintenance
New Build Home: Usually minimal in the early years
Older Home: May require ongoing repairs, upgrades and maintenance
Sustainability features
New Build Home: Often includes solar PV panels, EV charging points and other energy-saving technologies
Older Home: May require retrofitting to achieve similar standards
- Source: Home Builders Federation (HBF) 'Watt a Save' Report, 2026.*
Understanding the Benefits of an Energy-Efficient Home
Energy efficiency is about far more than reducing your monthly utility bills. A well-designed home can be warmer in winter, cooler in summer and more comfortable to live in throughout the year, while also reducing its environmental impact.
Modern new build homes are designed with energy performance in mind from the very beginning. From enhanced insulation and high-performance glazing to renewable technologies and efficient heating systems, every element works together to reduce energy consumption and create a more sustainable home.
Below, we answer some of the questions buyers most commonly ask when comparing new build homes with older properties.
Why are new build homes more energy efficient?
New homes are built to the latest Building Regulations, which set significantly higher standards for insulation, ventilation and energy performance than those applied to many older properties.
Developers now use modern construction methods, advanced building materials and carefully designed heating and ventilation systems to minimise heat loss and maximise efficiency.
The result is a home that requires less energy to keep warm during winter and cool during summer, helping homeowners reduce both energy consumption and household bills.
What makes a new build home energy efficient?
Modern homes often include:
- High-performance insulation in walls, roofs and floors
- Energy-efficient windows and doors
- Improved airtightness to reduce heat loss
- Low carbon heating systems
- Smart heating controls
- Low-energy LED lighting
- Solar photovoltaic (PV) panels on selected homes
Together, these features help reduce the amount of energy required to heat and power a home.
Do new build homes have lower energy bills?
In most cases, yes. According to the HBF, the average household living in a new build home spends around £420 less per year on energy than someone living in an older property.
Many buyers also benefit from:
- Lower heating bills
- Reduced electricity consumption
- Lower maintenance costs
- Greater protection against future energy price rises
Over the lifetime of a mortgage, these savings can make a meaningful difference to overall household finances.
What is an EPC rating?
An Energy Performance Certificate (EPC) measures how energy efficient a property is. Homes receive a rating from A (most efficient) to G (least efficient).
Nearly all new build homes now achieve an EPC rating of A or B, reflecting the high energy performance standards required by modern Building Regulations.
Older homes can still achieve high EPC ratings, but they often require significant investment in insulation, heating systems and renewable technologies to reach similar standards.
Can new build homes reduce your carbon footprint?
Yes. Using less energy doesn't just reduce running costs, it also helps lower carbon emissions.
The latest HBF research suggests that a modern new build home can produce up to 74% fewer carbon emissions than some of the least energy-efficient older homes.
For buyers looking to reduce their environmental impact, choosing an energy-efficient home can be an important step towards more sustainable living.
Is it cheaper to buy a new build than renovate an older home?
While every purchase is different, it's worth considering the long-term costs of upgrading an older property. According to the HBF, bringing an older home up to the same energy efficiency standards as a modern new build could cost between £23,100 and £83,000, depending on the work required.
By comparison, a new build home already incorporates many of these energy-saving features from day one.
What energy-saving features should buyers look for?
When viewing a new home, buyers should consider:
- EPC rating
- Solar PV panels
- Electric vehicle charging points
- High-performance insulation
- Efficient glazing
- Smart heating controls
- Low-energy lighting
- Sustainable building materials
These features can all contribute to lower running costs and improved environmental performance.
Why choose a new build home?
Alongside improved energy efficiency, new build homes offer several practical advantages.
Many buyers appreciate:
- Lower maintenance requirements
- Modern layouts designed for contemporary lifestyles
- Flexible living spaces suitable for hybrid working
- New home warranty protection
- Contemporary kitchens and bathrooms
- Sustainable design and construction
- Reduced repair costs during the early years of ownership
For many homeowners, this combination of efficiency, comfort and peace of mind makes a new build an attractive long-term investment.
Sustainability at Elivia Homes
At Elivia Homes, sustainability is a key consideration from the earliest stages of design and construction.
Our homes are built to meet the latest Building Regulations and incorporate features that help homeowners reduce both their environmental impact and everyday running costs.
Depending on the development, these may include:
- Solar photovoltaic panels
- Air source heat pumps
- Electric vehicle charging points
- High levels of insulation
- Energy-efficient glazing
- Timber-frame construction using responsibly sourced materials
- Carefully considered design to maximise energy performance
By combining thoughtful design with modern construction techniques, we're creating homes that are comfortable, efficient and built for the future.
Looking to the Future
With lower running costs, reduced carbon emissions, improved comfort and modern technology built in from the outset, new build homes offer clear advantages over many older properties.
As building standards continue to evolve, choosing an energy-efficient new home is not only an investment in your property but also in your long-term financial wellbeing and a more sustainable future.
Explore our Sustainable Development page to learn more about our fabric-first approach, renewable technologies and commitment to creating energy-efficient communities.
