Energy Efficiency: Cut Your Bills
EPC ratings, smart meters, whole-house retrofits, and practical ways to cut your energy bills.
You don't need to spend thousands to cut your energy bills. Bleeding radiators, draught proofing doors, fitting a smart thermostat, swapping the tumble dryer for a heated airer: the small stuff adds up to £100-400 a year for less than £200 spent.
Your EPC rating matters more than you might think too: your EPC isn't a gate for the big grants (the Boiler Upgrade Scheme doesn't ask for one at all), but a poor rating is what qualifies you for free insulation under ECO4, and from 1 October 2030 landlords will need a C, on a single compliance date covering new and existing tenancies alike. Think of energy efficiency as the foundation everything else builds on. Get this right first and every other upgrade (heat pumps, solar, batteries) works harder.
Bottom line
A weekend of cheap fixes typically knocks 10-20% off your bills before any big upgrade.
Smart thermostat, draught proofing, bleeding radiators and swapping the tumble dryer for a heated airer: the small stuff adds up faster than people expect, for less than £200 spent. If you let the place out, the other big prize is getting the EPC up to C, which every privately rented home in England and Wales needs by 1 October 2030. Worth being clear that a good EPC is not what unlocks grants: the Boiler Upgrade Scheme asks for no EPC at all, and it is a poor rating that qualifies you for free insulation under ECO4. Insulation, heat pumps and solar all work harder once this groundwork is in place.
The savings ladder: where to start
Typical UK figures for 2026, ranked by payback time. Highlighted row is the weekend job worth doing this month.
| Upgrade | Cost | Annual saving | Payback |
|---|---|---|---|
| Bleed rads + draught proof | £0-300 | £55, plus £45 for a chimney | 1-3 yrs |
| Heating controls / smart thermostat | £100-250 | £100 | 1-3 yrs |
| Cavity wall fill | ~£2,200 | ~£200 | About 11 yrs |
| Solar panels (4 kW) | £5,000-7,000 | ~£700 | 7-10 yrs |
| Heat pump (after BUS grant) | £500-6,500 | £140-345 | Varies with tariff |
| Loft insulation, bare to 270mm | ~£750 | ~£190 | About 4 yrs |
| Loft top-up, 120mm to 270mm | ~£600 | £17 | 30+ yrs |
Start here
Get your bearings, then check your EPC
The home-energy overview gives you the order to do things in. Run the EPC calculator to see which combination of upgrades gets your house to a C, and bleed the radiators while you're at it (15 minutes, free).
GuideWhere to start: the order that pays back fastest
A pragmatic walkthrough of every meaningful upgrade for a UK home, ranked from cheapest-fast-fix to biggest-payback-investment, with realistic costs and savings for each.
Read guideEPC improvement calculator
See how much each upgrade adds to your EPC SAP score, what it'll cost, and which combination gets you to a C (the gate for most grants and the 2028 landlord rule).
Open calculator
Improving your EPC, by current rating
See where it goes
Find your big spenders
You can't cut what you can't measure. Most homes have one or two appliances quietly costing £100+ a year that nobody notices until they look. A monitor or smart plug pays for itself the first time it catches one.
GuideBest home energy monitors
Real-time clamp meters, smart-meter displays and the Hildebrand Bright app: which actually shows you something useful, and which are a waste of £100. Most homeowners find one big surprise in week one.
Read guide
GuideBest smart plugs with energy monitoring
Per-appliance usage data without a smart meter rollout. Tapo, TP-Link and Shelly options that catch the big spenders (kettle, fridge, old TV) and let you turn things off remotely.
Read guideSmart kit
Appliances that earn their keep
A heated airer plus a dehumidifier replaces the tumble dryer for a fraction of the running cost. Booster fans and portable AC are niche but useful in the right room. Here's what's actually worth buying.
GuideBest heated clothes airers (vs the tumble dryer)
A heated airer runs at 200-300W vs a tumble dryer's 2,500-3,000W. For most households that's £50-150 a year saved, with the airer paying for itself by spring. The models worth buying.
Read guide
GuideBest dehumidifiers for drying clothes
Pair a dehumidifier with the heated airer and you'll dry a load overnight for under 30p of electricity. Compressor vs desiccant, the right capacity for a UK home, and the brands worth the money.
Read guide
Get started
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