The house that's paying for itself

The house that's paying for itself

The latest statistics published by the Department of Energy & Climate Change report that the average amount paid in the UK for gas is £752 and £592 for electricity annually. This brings the total cost to a staggering £1,344 a year. The Office of Gas and Electricity Markets (Ofgem) predicts that this will continue to rise as ‘we face a combination of factors which are likely to increase energy prices.’ 

Average UK Bills








Aviva’s Family Finances Report also reveals that each year, families are still spending a significant amount of money on other outgoings on top of their gas and electricity payments. This includes £2,472 on food shopping, £1,188 on public transport and £6,060 on rent or mortgage payments.

As we feel the strain of all these expenses, there’s a growing emphasis on the need to decrease energy consumption and reduce our fuel bills, whilst also producing cleaner energy to help protect our environment. We’ve investigated the available energy saving technologies for your home, and discovered that by investing in them all, you could make substantial savings.

Having a clear idea about just how much money you could save will help you understand how you could spend your disposable income in other ways. You’ll have more money to take your family on holiday, treat yourself to a new luxury purchase, or simply put some funds away for a rainy day. 

Costs and savings*

The table below looks at the average costs, savings and payments of each energy saving technology you could add to your home. 

Energy Saving Technology


Annual Savings

Feed-in Tariff Payment

Payback Time (Years)

CFL light bulb (x14)





Double glazing





Dual flush toilet





Water saving showerhead





Loft insulation





Cavity wall insulation





DIY draught-proofing





Smart thermostat





Rainwater harvesting system





Solar panels











The breakdown of figures reveals that after 7.2 years, the costs of the technologies you’ve installed would have been paid back. From then, you could be saving a massive £1,341 anually on your bills. 

The findings from the table also give insight into which technologies could produce the quickest return on investment:

  • By purchasing an affordable water-saving shower head, you’ll almost instantly cover the initial cost with the significant savings you’ll make.
  • Although a rainwater harvesting system would be a larger investment of around £2,500, and could take 9.7 years to pay back, it’s the technology which could actually make you the biggest savings in the long run.
  • It’s apparent that CFL light bulbs are one of the cheapest and easiest way to cut down on costs around your home, and switching to LED bulbs could provide further savings.
  • The table also reveals that double glazing could take the longest amount of time to pay back, at approximately 28.5 years. Despite this, there’s the advantage of reduced external noise and you can also add value to your home.
  • DIY draught-proofing appears to make the smallest savings, although you’ll still benefit from these simple additions which you can make to your house.   

It’s crucial to remember that different energy saving technologies will be more suitable for each house, different families and individual needs. You can click here to find out more about each technology, and learn which is the most suitable for you. However, if you are in a feasible position to be able to invest in all the technologies available, this research shows that it’s possible for you to live in a house that's paying for itself. 


Please see below for sources used for the cost and saving indications throughout this article. All figures provided are approximate. They do not take into account fluctuations in energy prices, inflation, or any energy saving devices already installed in your home.


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