Quick Wins (Under £500)
Smart thermostat (£150–£250 installed): A smart thermostat like Hive, Nest, or tado° can save 10–15% on heating bills by learning your schedule and heating only when needed. If you have a heat pump, weather compensation does this job even better.
LED lighting (£50–£150): If you still have halogen or CFL bulbs, switching to LED cuts lighting costs by up to 80%. A typical home saves £40–£60/year.
Draught-proofing (£100–£300): Sealing gaps around doors, windows, letterboxes, and chimneys is one of the most cost-effective energy improvements. You can DIY most of it.
Hot water cylinder jacket (£15–£25): If your cylinder is uninsulated, a jacket saves £30–50/year. A no-brainer.
Medium Investments (£500–£5,000)
Loft insulation top-up (£300–£600): Building regulations now recommend 270 mm of loft insulation. If yours is less, topping it up is one of the best investments you can make.
Cavity wall insulation (£500–£1,500): If your home has unfilled cavity walls (built after 1920, before 2000), filling them saves £150–£300/year.
Double/triple glazing (£3,000–£8,000): If you still have single glazing, upgrading makes a significant difference. If you already have double glazing, the savings from triple glazing are more modest.
Long-Term Investments (£5,000+)
Solar panels (£4,500–£14,000): Generate your own electricity and slash your bills by 50–70%. With 0% VAT, the payback period is 6–8 years.
Air source heat pump (£4,500–£8,000 after BUS grant): Replace your gas boiler with a system that costs less to run and qualifies for £7,500–£9,000 in grants.
Solar + heat pump + battery (£10,000–£20,000 after grant): The ultimate combination. Near-zero energy bills, energy independence, and future-proofing against price rises.
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The Order Matters
We always recommend “fabric first”: improve your insulation before investing in generation. A well-insulated home needs a smaller (cheaper) heat pump and fewer solar panels to meet the same demand.
Our home survey assesses your whole home and recommends improvements in the most cost-effective order.
The 2026 Bill-Cutting Checklist (With Real Savings)
Not every energy-saving measure is worth the effort. Here is our honest, ranked checklist of what actually moves the needle on a UK home’s bills in 2026, with realistic annual savings.
- Switch off gas heating for a heat pump (biggest lever): typically £200–£400+ a year off heating versus a boiler, far more if you are on oil or LPG.
- Add solar panels: £400–£700 a year in avoided imports plus SEG export payments.
- Add a home battery: a further £300–£500 by storing cheap and free power for peak times.
- Move to a time-of-use or heat-pump tariff: £100–£300 by shifting heating, EV charging and battery charging to off-peak.
- Top up loft insulation to 270mm: £50–£150 and it makes any heat pump cheaper to run — grants may be available.
- Draught-proofing and smart controls: £50–£100 for very little outlay.
The pattern is clear: the largest, most durable savings come from changing how you generate and store energy, not from turning the thermostat down a degree. The measures also compound — solar makes a heat pump cheaper to run, a battery makes solar go further, and a smart tariff makes the battery pay faster. That is why we design homes as a single energy system rather than selling one product at a time.
Frequently asked questions
Start with low-cost wins: a smart thermostat (£150–£250, saves 10–15% on heating), LED lighting, draught-proofing and a cylinder jacket. Together these can save £100–£200+ a year for a few hundred pounds.
Yes — by heating only when and where needed they typically cut heating use by 10–15%. With a heat pump, weather compensation does much of this automatically for even better results.
Do fabric first. Better insulation means a smaller, cheaper heat pump and lower running costs, so loft top-ups and cavity wall insulation should come before generation wherever possible.
The £7,500–£9,000 Boiler Upgrade Scheme for heat pumps, 0% VAT on heat pumps and solar, ECO4 (closing 31 December 2026) for insulation, and local schemes. We check which you qualify for.
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