How to Improve Your EPC Rating Cheaply in 2026

The table below ranks every common improvement by cost per EPC point gained. The best value improvements are at the top. Some are available free through government grants.

The pattern is clear: insulation and lighting upgrades give you the most EPC points per pound spent. A new gas boiler, at about £440 a point, costs about the same per point as a heat pump replacing an old gas boiler, about £430 a point once the grant is taken off. Expensive measures like double glazing and solar panels add fewer points relative to their cost, though they offer other benefits like bill savings and comfort.

Currently, rental properties in England and Wales must have a minimum EPC rating of Band E (39 points). The government confirmed in January 2026 that every privately rented home must meet a band C equivalent standard from 1 October 2030, with no earlier date for new tenancies. It will be measured on the new EPC metrics, fabric performance first.

Today the maximum fine for letting a property below the minimum standard is £5,000 per property. Under the 2030 rules it rises to £30,000 per property per breach.

Landlords will have to spend up to £10,000 per property. If the home still falls short at that cap, they can register a cost cap exemption, which lasts 10 years. See our EPC guide for landlords. Landlord Planner, our sister site for landlords, has an EPC C 2030 planner that totals the work for a rental.

Band D covers 55 to 68 points. Band C starts at 69. So you need to gain 1 to 14 points depending on where you are within Band D.

If you are at the top of Band D (65 to 68 points), a single cheap measure might be enough. LED lighting throughout (2 or 3 points for £100 to £300) or smart heating controls (about 3 points for £150 to £400) could push you over the line.

If you are in the middle of Band D (58 to 64 points), you need 5 to 11 points, which usually means two or three measures. Where the loft has under 100mm, loft insulation plus LED lighting and heating controls add about 12 to 13 points for about £1,200.

If you are at the bottom of Band D (55 to 57 points), you need 12 to 14 points. Cavity wall insulation adds about 8 points for about £2,200, so it usually needs pairing with loft insulation or cheaper measures. Or combine loft insulation, LEDs and smart heating controls for about 12 to 13.

Use our EPC improvement calculator to find the exact combination for your property.

Band E covers 39 to 54 points. Reaching Band C (69 points) means gaining 15 to 30 points. This is a bigger jump but still achievable without massive expense.

The most cost-effective route for many Band E homes is: loft insulation (about 7 points), cavity wall insulation (about 8 points), and LED lighting with heating controls (about 5 or 6 together). That is about 20 or 21 points for about £3,400 at full price. Many homes will qualify for free insulation through ECO4 until 31 December 2026, reducing the cost to the lighting and controls.

Homes with solid walls face a harder challenge. Internal solid wall insulation adds about 10 points in our model but costs about £12,000 for a typical 3 bed semi (Energy Saving Trust). It may be available free through ECO4 for qualifying households until 31 December 2026, and councils in England run Warm Homes: Local Grants for lower income households.

Several government schemes provide free or heavily subsidised EPC improvements.

ECO4 scheme. If you receive a means-tested benefit such as Universal Credit or Pension Credit and your EPC is Band D, E, F, or G, you may qualify for free loft insulation, cavity wall insulation, solid wall insulation, or a first-time central heating system. Contact your energy supplier to apply, and do it soon: ECO4 ends on 31 December 2026 and the work has to be finished by then. Check your eligibility.

Warm Homes: Local Grant. Run by councils in England for lower income households, it can fund insulation, heat pumps and solar panels. Availability depends on your council.

Boiler Upgrade Scheme. Provides £7,500 towards a heat pump, or £9,000 when it replaces oil or LPG, until March 2027, in England and Wales. In our points model a heat pump adds about 12 points against a gas boiler over 15 years old. Available to homeowners, including landlords, replacing a fossil fuel heating system. Your MCS-certified installer applies on your behalf. Calculate your heat pump costs.

Home Upgrade Grant. This closed on 31 March 2025 and was replaced by the Warm Homes: Local Grant above. See our Home Upgrade Grant guide.

0% VAT. Solar panels, heat pumps, and insulation are zero-rated for VAT until 31 March 2027, after which the 5% reduced rate returns.

Double glazing purely for EPC. At about £4,800 for a semi-detached house (Energy Saving Trust) and about 6 points in our model, double glazing is one of the worst value improvements for EPC purposes. It improves comfort and reduces noise, but if your only goal is a better EPC rating, spend the money on insulation instead. Our guide to whether double glazing is worth it sets out its payback.

Solar panels purely for EPC. Solar adds about 8 points in our model but costs £5,000 to £7,000. The financial return from solar is good, with a 4 kW system paying for itself in about 11 to 12 years on a south facing roof, but as an EPC strategy alone, it is expensive per point. Install solar for the bill savings, not the EPC bump.

Expensive boiler upgrades when insulation is missing. Replacing a working boiler to gain EPC points is rarely cost-effective; our guide to whether it is worth replacing an old boiler gives the saving by type of home. Focus on insulation first. If your boiler does need replacing, consider a heat pump instead, which adds about 12 points against an old gas boiler in our model, against about 8 for a new boiler, and qualifies for the £7,500 grant. After the grant a median heat pump for a 3 bed semi costs about £5,200, against about £3,500 for a new gas boiler.

After making improvements, you need a new EPC assessment to reflect your upgraded rating. A domestic EPC assessment costs £55 to £150, and £65 to £95 for a typical two or three bedroom house, and takes under an hour for most homes. The assessor checks insulation levels, heating system, windows, lighting, and other features.

Find an accredited energy assessor with the government's assessor finder, and check the EPC register for your current certificate first. Make sure the assessor is aware of all improvements you have made, including anything hidden (like cavity wall insulation) that might not be immediately visible.

An EPC is valid for 10 years. You do not need to renew it until you sell or let the property again, but commissioning a new one after improvements can increase property value and demonstrate compliance with minimum standards.

EPC points from the simple points model in our EPC calculator, not from SAP itself. Insulation costs from the Energy Saving Trust (2026). Heat pump costs from the DESNZ Boiler Upgrade Scheme statistics (August 2026). New gas boiler cost from the DESNZ Boiler Upgrade Scheme 2026 to 2030 summary business case. Landlord rules from the government response of 21 January 2026. Grant information from GOV.UK. See our full methodology.