If your recent Energy Performance Certificate (EPC) score came back lower than you’d hoped, you’re not alone. We’ve met plenty of homeowners and landlords in the same boat.
Here’s the good news:
You can improve your EPC rating in the UK without splashing out on big renovations. In fact, there are small, inexpensive tweaks - some you can do in a weekend - that can boost your EPC score, increase your EPC band, and make your home feel warmer and cheaper to run.
Whether you’re selling, renting, or just sick of high bills, these ideas will help you get a better score and a more comfortable home, without breaking the bank.
Jump straight to the FAQ section of this article for quick answers.
The Cheapest Ways to Improve Your EPC Rating in the UK
The cheapest ways to improve your EPC rating without spending much include switching to LED bulbs, topping up loft insulation, improving heating controls, and adding hot water cylinder insulation. Many of these upgrades cost less than £100 and can quickly raise your EPC band.
1. Switch to LED Lighting
Think of this as the “easy win” of EPC upgrades.
Why it works: LEDs use up to 80% less energy and last for years.
Cost: £2 - £4 per bulb
Impact: Small, but quick and cheap.
2. Upgrade Your Heating Controls
Adding a programmer, room thermostat, or thermostatic radiator valves (TRVs) gives you better heating efficiency in EPC scoring.
Why it works: You can gain more points on an EPC assessment for improved control of main heating.
Cost: Typically £150-£400 for a programmer and room thermostat supplied and fitted. TRVs are £10-£30 per radiator plus fitting. Use a qualified heating engineer or electrician.
Impact: Moderate - especially in homes with older boilers.
3. Top Up Loft Insulation
If your loft insulation is under 270mm, you’re probably losing heat through the roof.
Cost: £5 - £8 per m² (DIY rolls)
Impact: High - often one of the biggest EPC boosters in the UK.
4. Insulate Hot Water Pipes & Cylinder
Older systems lose heat fast. A jacket and lagging can help. Aim for an 80 mm+ cylinder jacket or factory-applied foam equivalent. Lag at least the first 1-1.5 m of primary flow and return from the cylinder so it is recorded in the EPC.
Cost: £15 - £25 for jacket, £1 - £3 per metre of lagging
Impact: Small but cost-effective.
5. Add Secondary Glazing
If double-glazing isn’t in the budget, this DIY option can help in single-glazed homes.
Why it works: The EPC recognises improved window performance when single glazing is upgraded or supplemented.
Cost: £15–£30 per window
Impact: Moderate if supplementing single glazing; little to no impact if double-glazed already.
6. Improve Cavity Wall Insulation
If your home has unfilled cavity walls, insulating them is a high-scoring EPC change.
Why it works: Wall insulation is one of the biggest EPC factors after heating efficiency
Cost: Usually £900–£1,500; professional installation required.
Impact: High - especially in older homes.
7. Insulate Suspended Timber Floors
Adding insulation under floorboards reduces heat loss through the ground floor.
Why it works: Floor insulation is scored in the EPC for thermal performance.
Cost: £20 - £30 per m² DIY; higher for professional installs.
Impact: Typical EPC uplift is small to moderate. Comfort improvement is often greater than the points gained.
8. Replace Old, Inefficient Electric Heaters
If you have old panel or storage heaters, swapping to modern high heat retention models can lift your EPC band. Smart panel heaters may improve control, but EPC gains are larger when replacing old units with HHR storage heaters or a heat pump.
Why it works: The EPC rates heating efficiency based on technology type, and high-retention models score better.
Cost: Typically £400 - £900 per high-heat-retention storage heater supplied and fitted.
Impact: High in all-electric homes.
9. Fit a Cylinder Thermostat (if Missing)
If you have a hot water cylinder but no dedicated thermostat, your water may be heated to unnecessary temperatures, wasting energy. Adding a cylinder thermostat allows the system to heat water only to the set temperature, cutting waste and improving your EPC score.
Why it works: EPC software awards points for hot water systems with proper temperature control. A thermostat is recorded separately from the boiler controls and can improve the efficiency rating.
Cost: Around £20 - £40 for the unit, plus installation.
Impact: Small to moderate EPC gain, but very cost-effective when combined with cylinder and pipe insulation.
10. Get an EPC Data Review
Sometimes your EPC score in the UK is low because the data’s wrong or incomplete.
At EPC247, we can:
Spot missing insulation records
Correct heating system details
Boost your EPC score without any physical upgrades
See more information about our data review service here. Only verifiable evidence can be used, and the EPC must reflect the property at the time of assessment. Corrections lift scores only where the original data was wrong or incomplete.
FAQs: How to Improve Your EPC Rating Without Spending Much in the UK
Q: What’s the cheapest way to improve my EPC rating in the UK?
A: Some of the cheapest ways include switching to LED bulbs, topping up loft insulation, and insulating your hot water cylinder. Many of these can be done for under £100 and still boost your EPC score.
Q: How can I increase my EPC band quickly?
A: Topping up loft insulation is often the fastest and most effective way. In some cases, correcting missing data in your EPC report can also give an instant improvement.
Q: Does improving my EPC score add value to my home?
A: Yes – a higher EPC band can make your property more attractive to buyers and tenants, and in many cases increases its market value.
Q: Can I improve my EPC score without replacing my boiler?
A: Absolutely. Smaller changes like improving heating controls, insulation, and lighting can all help.
Q: How much does it cost to move up one EPC band?
A: It varies depending on the property, but some homes can move up a band for under £500 with targeted measures like a loft top-up and lighting changes. However, many will need a larger budget depending on the current fabric and heating.
Before You Spend - Speak to an Expert
Not all upgrades give the same return. At EPC247, we’ve seen properties jump a full EPC band with just one change - like topping up loft insulation or fixing an error in the data.
We’re a local, family-run team based in Hull, serving Yorkshire & Humber. We know the quirks of local housing stock, and we’ll always tell you the cheapest ways to improve your EPC before you spend a penny more than you have to.
Turning Tips into Action
Improving your EPC rating in the UK doesn’t have to be costly or complicated. Start small, focus on the upgrades with the biggest impact, and you’ll see results - not just in your EPC band, but in your comfort and energy bills.
Ready to see where your EPC points are hiding? Book your EPC Data Review today and find out the cheapest ways to boost your score.
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