How to Improve Your EPC Rating: 12 Proven Ways to Boost Your Score in 2026

# How to Improve Your EPC Rating: 12 Proven Ways to Boost Your Score

Your Energy Performance Certificate (EPC) rating tells you how energy efficient your home is — and in 2026, it matters more than ever. With the government confirming that all rental properties in England and Wales must reach EPC band C by October 2030, and energy bills remaining stubbornly high, improving your EPC score isn't just about paperwork. It's about saving money and future-proofing your home.

Whether you're a homeowner looking to cut bills, a landlord preparing for new regulations, or someone hoping to sell at a higher price, this guide walks you through the most effective ways to improve your EPC rating — ranked by cost and impact.

What Is an EPC Rating and Why Does It Matter?

An EPC grades your home's energy efficiency from A (most efficient) to G (least efficient). The average UK home currently sits at band D, with a score of around 60 out of 100. Each improvement you make adds points to your score, and crossing a band threshold (say, from D to C) can make a real difference to your property's value and running costs.

Here's why your EPC rating matters right now:

• **New landlord regulations** — rental properties must hit EPC C by October 2030, with a £10,000 cap on required spending per property over 10 years
• **Higher property values** — homes with better EPC ratings typically sell for more, with some studies showing a premium of up to 5% for an A or B rated property
• **Lower energy bills** — a home rated C rather than D can save £200–£400 per year on energy
• **Access to grants** — many government schemes require a minimum (or maximum) EPC rating to qualify

Quick Wins: Low-Cost Improvements (Under £500)

These are the easiest and cheapest upgrades, perfect if you want to nudge your score up a few points without a major outlay.

1. Switch to LED Lighting Throughout

Cost: £50–£150 | EPC impact: 1–2 points

It sounds small, but if your EPC assessment still shows old halogen or CFL bulbs, switching to LEDs across the whole house can pick up easy points. Most homes can be fully converted in an afternoon.

2. Upgrade Your Heating Controls

Cost: £150–£350 | EPC impact: 2–4 points

If you don't have a room thermostat, a programmer, and thermostatic radiator valves (TRVs), adding these is one of the cheapest ways to improve your score. Smart thermostats like Hive, Nest, or Tado count too and can save you around £75–£150 per year on heating.

3. Draught-Proof Windows and Doors

Cost: £100–£300 | EPC impact: 1–3 points

Sealing gaps around windows, doors, letterboxes, and loft hatches is cheap and effective. Self-adhesive draught strips cost just a few pounds per door, and professional draught-proofing for a whole house rarely exceeds £300.

4. Top Up Your Loft Insulation

Cost: £0–£500 (often free via grants) | EPC impact: 5–10 points

This is often the single biggest quick win. If your loft insulation is below the recommended 270mm, topping it up is straightforward and can dramatically improve your score. Many homes still have just 100mm or less. A professional installation for a typical 3-bed semi costs around £300–£930 depending on the property, but you may qualify for free loft insulation through the ECO4 scheme (open until December 2026) or the Warm Homes Local Grant.

Medium Investment: Upgrades Worth £500–£5,000

These improvements require more spending but deliver significantly bigger EPC gains and long-term savings.

5. Install Cavity Wall Insulation

Cost: £500–£1,500 | EPC impact: 5–15 points

If your home was built between the 1930s and 1990s, there's a good chance it has unfilled cavity walls. Getting them insulated is one of the most cost-effective upgrades available. The typical cost for a 3-bed semi is around £650–£1,200, and it can cut your heating bills by up to £395 per year. You may also be eligible for free cavity wall insulation through government-backed schemes.

6. Upgrade to Double or Triple Glazing

Cost: £3,000–£5,000 (whole house) | EPC impact: 3–8 points

If you still have single-glazed windows, upgrading makes a noticeable difference to both your EPC score and your comfort. Double glazing is the standard choice, though triple glazing is increasingly popular for new builds and extensions. The EPC impact depends on how many windows you're replacing and what you had before.

7. Insulate Your Floor

Cost: £500–£2,500 | EPC impact: 3–6 points

Floor insulation is often overlooked, but it's flagged on many EPC reports as a recommended improvement. Suspended timber floors can be insulated from below relatively easily, while solid concrete floors usually need insulation boards laid on top. The payback period is typically 5–8 years.

8. Install a Hot Water Cylinder Jacket and Pipe Insulation

Cost: £20–£50 | EPC impact: 1–3 points

If you have a hot water cylinder without a factory-fitted insulating jacket, wrapping it in a British Standard jacket (at least 80mm thick) is one of the cheapest improvements going. Adding pipe insulation to exposed hot water pipes costs virtually nothing and can save £20–£30 per year.

Major Improvements: Investments Over £5,000

These are the upgrades that can transform your EPC rating by 15–30+ points. They cost more upfront, but grants can significantly reduce the bill.

9. Install Solar Panels

Cost: £5,500–£8,500 (4kW system) | EPC impact: 5–15 points

A typical 4kW solar PV system generates enough electricity to cover a large chunk of a 3-bed home's annual usage. Solar panels add points to your EPC because they reduce your reliance on grid electricity. In 2026, you benefit from 0% VAT on residential solar installations (until March 2027), and you can earn money by exporting surplus energy through the Smart Export Guarantee. Adding battery storage (£3,000–£5,000 extra) increases your self-consumption but doesn't currently add extra EPC points.

10. Replace Your Boiler with a Heat Pump

Cost: £7,000–£14,000 (before grants) | EPC impact: 10–20+ points

Switching from a gas or oil boiler to an air source heat pump is the single biggest EPC improvement most homes can make. Heat pumps are rated much more favourably in the SAP methodology used for EPC assessments because they deliver 2.5–3.5 units of heat for every unit of electricity used.

The upfront cost of a heat pump is higher than a boiler replacement, but the £7,500 Boiler Upgrade Scheme grant (extended to 2030) brings the net cost down significantly. You can estimate your savings using our heat pump cost calculator.

11. Install Solid Wall Insulation (Internal or External)

Cost: £5,000–£15,000 | EPC impact: 10–20 points

If your home has solid walls (typically pre-1930s properties), this is the most impactful insulation upgrade available. External wall insulation involves adding an insulating layer and render to the outside of your home, while internal wall insulation adds insulated plasterboard inside. Both are effective, but external tends to score slightly better on EPC assessments and doesn't reduce your room sizes.

12. Upgrade to a Modern Condensing Boiler

Cost: £2,500–£4,500 | EPC impact: 5–10 points

If you're not ready for a heat pump but your boiler is old and inefficient (pre-2005), replacing it with a modern A-rated condensing boiler can still improve your EPC significantly. New condensing boilers run at 90%+ efficiency compared to 60–70% for older models.

How Much Does It Cost to Improve Your EPC Rating?

The total cost depends on where you're starting and where you need to get to. Here's a rough guide:

• **G to D:** £3,000–£8,000 (typically needs insulation, heating controls, and possibly a boiler upgrade)
• **E to C:** £2,000–£6,000 (usually insulation plus one or two bigger upgrades)
• **D to C:** £500–£3,000 (often achievable with loft insulation, cavity walls, and heating controls alone)

Remember, landlords have a £10,000 spending cap over 10 years to reach the new minimum standards, and many improvements qualify for government grants that can cover part or all of the cost.

Grants That Can Help Pay for EPC Improvements

Several government-backed schemes can significantly reduce your costs:

• **Boiler Upgrade Scheme (BUS)** — £7,500 towards a heat pump installation. Available to all homeowners until 2030. [Read our full guide](/heat-pump-grants-uk-bus-grant-2026).
• **ECO4** — free insulation and heating upgrades for low-income households. Runs until December 2026.
• **Warm Homes Local Grant** — fully funded upgrades for households earning under £36,000/year, including insulation, heat pumps, and solar panels. Apply through your local council or call 0800 098 7950.
• **Great British Insulation Scheme (GBIS)** — free or subsidised insulation for eligible homeowners based on property EPC rating and council tax band. Due to close March 2026 but check for successor schemes.

How to Get a New EPC After Making Improvements

Once you've made your upgrades, you'll need to book a new EPC assessment to get your updated rating. Here's the process:

1. Find an accredited assessor — search the government's EPC register or comparison sites. Costs typically range from £60–£120. 2. Prepare your paperwork — gather any certificates, guarantees, or receipts for the work you've had done (FENSA certificates for windows, MCS certificates for solar panels, etc.). 3. Be present during the assessment — point out improvements the assessor might not spot, like cavity wall insulation or underfloor insulation. 4. Check the report — make sure all your improvements are correctly recorded. If something's been missed, ask the assessor to amend it before they lodge the certificate.

Frequently Asked Questions

What is the cheapest way to improve my EPC rating?

Topping up your loft insulation to 270mm is usually the cheapest and most impactful single improvement. If your home qualifies for ECO4 or the Warm Homes Local Grant, you could get this done for free. Adding heating controls (thermostat, programmer, TRVs) is the next best low-cost option.

How many EPC points do I need to go from D to C?

EPC band C starts at 69 points, while band D covers 55–68. So you might need anywhere from 1 to 14 additional points depending on your current score. Check your existing EPC certificate for your exact number — you can look it up for free on the government's EPC register.

Do I need to improve my EPC rating if I'm a landlord?

Yes. The government confirmed in January 2026 that all rental properties in England and Wales must meet a minimum of EPC band C by 1 October 2030. There's a spending cap of £10,000 per property over a 10-year period. If you can't reach band C within that budget, you can register an exemption — but you'll still need to show you've spent up to the cap on improvements.

Will improving my EPC rating increase my property value?

Generally, yes. Research suggests homes with EPC ratings of A or B sell for around 3–5% more than equivalent properties rated D or below. Buyers are increasingly aware of energy costs, and a good EPC rating signals lower running costs.

How long does a new EPC assessment take?

A typical domestic EPC assessment takes 45 minutes to an hour. The assessor will check your walls, windows, roof, heating system, and lighting, then produce a report within a few days. The certificate is valid for 10 years.