Not necessarily. D is the UK average — you are in the same band as most homes in the country. However, a D rating means your home is less efficient than it could be, and you are likely paying more on energy bills than you need to. For landlords, D will become non-compliant from October 2030 when the MEES minimum rises to band C. For homeowners selling, a D rating can affect buyer perception.

How much does it cost to improve from EPC D to C?

It varies enormously. In our analysis of 85 D-rated properties, 11% could reach C for under £3,000 through simple measures like cavity wall insulation, loft top-up, and LED lighting. The median total cost of all recommended improvements was £11,000–£16,500, but most homes do not need everything — just enough to gain the 6 points to cross the C threshold.

Can I sell a house with EPC rating D?

Yes, there is no legal requirement for homeowners to improve their EPC before selling. You need a valid EPC to market the property, but there is no minimum rating for sale. However, buyers increasingly factor energy efficiency into their decisions, and some mortgage lenders offer better rates for homes rated C or above (green mortgages).

EPC22 February 2026·8 min read

What Does EPC Rating D Mean? And How to Improve It

Q: What does EPC rating D mean?

EPC band D covers energy efficiency scores from 55 to 68 (out of 100). It is the most common EPC rating in England, with around 38% of homes rated D. A D-rated home is of average energy efficiency — not terrible, but there are usually cost-effective improvements available. Typical energy bills for a D-rated home are £1,700–£2,100 per year.

If your EPC certificate shows a band D rating, you are in good company — it is the most common rating in England. Around 38% of homes sit in band D. You are not in crisis, but there are almost certainly improvements worth making — for your comfort, your bills, and potentially your property value.

EPC Rating D means your home has an energy efficiency score of 55 to 68 out of 100. Band D is the most common rating in England and Wales, covering around 38% of all homes. A typical D-rated home costs £1,200 to £1,600 per year to heat. It is not a bad rating, but there are usually cost-effective improvements available that could save you £200 to £400 per year.

EPC band D at a glance

55–68

SAP score range

38%

of English homes

6 pts

average gap to band C

Oct 2030

MEES deadline (landlords)

Where does D sit on the EPC scale?

The EPC scale runs from A (most efficient) to G (least efficient). Each band corresponds to a range of SAP scores out of 100:

92–100

81–91

69–80

25%

55–68

38%

39–54

19%

21–38

1–20

Source: MHCLG English Housing Survey 2023/24, percentage of English housing stock by EPC band.

What does a D rating actually tell you?

A D-rated home typically has some but not all of the following characteristics:

Heating

Usually a gas boiler — potentially an older or non-condensing model. Heating controls may be basic (no room thermostat, no TRVs on all radiators). Some D-rated homes still have old electric storage heaters.

Insulation

Typically has some loft insulation but may be below the recommended 270mm. Walls may be uninsulated (cavity or solid). Floor insulation is usually absent. Double glazing is likely present but may be older units with poor seals.

Draughts and ventilation

Often draughty — gaps around windows, doors, floorboards, and loft hatches. This is actually one of the cheapest things to fix and can make a noticeable difference to both comfort and EPC score.

Bills

A typical D-rated home pays around £1,700–£2,100 per year on energy bills (at Q1 2026 prices). Improving to band C could save £100–£300 per year depending on which improvements are made.

What does D mean for selling or renting?

For homeowners selling

There is no legal minimum EPC for selling a home. You need a valid EPC certificate to market the property, but you can sell a D-rated home without making any improvements.

However, buyers are increasingly aware of energy costs. Some mortgage lenders offer "green mortgage" rates for homes rated C or above. And a higher EPC can be a selling point — particularly for first-time buyers who will feel energy costs more acutely.

For landlords renting

This is where D becomes a problem. The current MEES minimum is band E, but from October 2030, the minimum for rental properties rises to band C.

If your rental property is rated D, you will need to improve it to C before the deadline (or spend up to £10,000 trying and register an exemption). See our landlord compliance guide for the full details.

The cheapest ways to improve from D to C

The good news: most D-rated homes only need 6 more EPC points to reach band C (the average D score is 63, and C starts at 69). Here are the cheapest improvements ranked by cost-effectiveness:

Improvement	Typical cost	EPC points	Annual saving
LED lighting throughout	£30–£80	1–3	£25–£45
Draught-proofing (doors, windows, loft hatch)	£50–£200	1–2	£60–£100
Loft insulation top-up (to 270mm)	£300–£600	2–4	£55–£90
Heating controls (smart thermostat + TRVs)	£150–£350	2–4	£75–£120
Cavity wall insulation*	£0–£500*	5–12	£180–£290
Floor insulation (suspended timber)	£800–£1,500/room	3–5	£70–£135

* Cavity wall insulation is often free or heavily subsidised through GBIS/ECO schemes. EPC point gains are approximate and vary by property. Sources: Energy Saving Trust, BRE SAP methodology.

💡 The cheapest path for most D-rated homes

For a D-rated home scoring 63 that needs 6 points to reach C:
LED lighting (2 pts) + loft top-up (3 pts) + draught-proofing (1 pt) = 6 points for under £700.

If you have unfilled cavity walls, cavity wall insulation alone (5–12 points) could get you there — and it is often free through GBIS grants.

For a detailed, data-driven analysis of improvement costs, see our EPC D to C cost analysis based on 85 real properties.

Grants available for D-rated homes

D-rated homes qualify for several government and supplier-funded schemes:

Great British Insulation Scheme (GBIS)

Free insulation (cavity wall, loft, floor, room-in-roof) for qualifying households. D-rated homes in council tax bands A–D can qualify without any income check. Funded by energy suppliers.

Runs until March 2026 — check eligibility now on our grants page.

Boiler Upgrade Scheme (BUS)

£7,500 grant towards an air source heat pump or ground source heat pump. Available to all homeowners (not just D-rated) but particularly relevant if your EPC recommends replacing your heating system.

Learn more in our heat pump guide.

Warm Home Discount

£150 off your electricity bill if you receive Pension Credit or are on a low income. Not a home improvement grant, but helps with the bills while you plan improvements.

Check your specific property

Every D-rated home is different. A Victorian terrace with solid walls is a completely different proposition from a 1970s semi with unfilled cavities. The only way to know exactly what your home needs — and what it will cost — is to check your specific EPC recommendations.

Our free tool pulls your actual EPC data, shows every recommended improvement with indicative costs, and tells you the cheapest path to band C. It takes 30 seconds.

Our honest take on EPC band D

D is the UK average. You are not living in an energy disaster. Your home is not falling apart. But "average" in the UK means your home is losing more heat than it needs to, and you are paying more on bills than you should be.

The improvements to reach C are usually not dramatic or expensive. For many D-rated homes, it is literally LED bulbs, loft insulation, and draught-proofing — under £700. If you have cavity walls, you might get there for free with a GBIS grant.

The real benefits are not just the EPC number. A warmer, less draughty home is more comfortable to live in. Lower bills every month. And if you ever sell or rent the property, C looks significantly better than D — both to buyers and to mortgage lenders offering green rates.

Check your EPC rating and recommendations

Enter your postcode to see your EPC rating, what improvements are recommended, and what grants you could claim. Free, instant, no sign-up.

Check your home →Read our EPC guide →

Other EPC rating guides

EPC Rating B

Excellent. Among the top 15% of UK homes.

EPC Rating C

The government target. What it means and whether C is good enough.

EPC Rating E

Below average. How bad is it and what to do about it.

EPC Rating F

Score 21-38. Below the legal minimum for renting.

EPC Rating G

Score 1-20. The worst possible rating.

Sources

MHCLG — English Housing Survey 2023/24 (EPC distribution by band)
BRE — SAP methodology (EPC scoring)
Energy Saving Trust — Home improvement savings estimates
GOV.UK — The New Decent Homes Standard (MEES band C confirmation, January 2026)