EPC Rating C Explained
A band C means your home scored 69–80 out of 100 on its Energy Performance Certificate — better than the UK average, cheaper to run, and the level most homeowners and landlords now aim for. Here's what that actually involves.
What a C rating means
A C-rated home is efficient, affordable to heat and easy to sell or let.
Every Energy Performance Certificate gives a property a score out of 100 and a letter band from A to G. The score reflects how the building is constructed, how it holds heat, how it is heated and lit, and whether it generates any of its own energy. Band C covers 69 to 80 points.
Most UK homes sit in band D. Moving up to a C usually means the loft and walls are properly insulated, the heating system is modern and controllable, and the glazing is doing its job. The practical result is lower running costs, a warmer home and a property that stands out when it goes on the market.
A C is also the threshold that matters commercially. Several lenders offer discounted or cashback green mortgages for homes rated C or above, and both buyers and tenants increasingly filter on energy performance before they book a viewing.
EPC bands and what each score means
The bands are fixed point ranges, so a property on 68 is a D and just one point short of a C. That's why the recommendations page of your certificate is worth reading.
- A92–100Exceptionally efficient — usually needs renewables such as solar or a heat pump.
- B81–91Highly efficient — well insulated with modern low-carbon heating.
- C69–80Efficient and cheap to run — the benchmark most homeowners and landlords aim for.
- D55–68The most common band in the UK — decent, with clear room to improve.
- E39–54The current minimum standard for most private rented homes.
- F21–38Poor — expensive to heat and cannot normally be let.
- G1–20Very inefficient — high bills and difficult to let or sell.
The measures that usually make the difference
Most homes reach a C through a short list of sensible works rather than a full retrofit. Your certificate ranks the measures for your specific property.
Loft & wall insulation
Topping loft insulation up to 270mm and filling cavity walls where the construction allows is usually the cheapest route to a higher score, and often the single biggest points gain.
Heating & controls
A modern condensing boiler, or a heat pump, plus a room thermostat and thermostatic radiator valves. Heating is weighted heavily in the assessment, so controls alone can add points.
Glazing & draught-proofing
Double or triple glazing and draught-proofed doors reduce heat loss. In conservation areas, secondary glazing is often the practical alternative.
Low-energy lighting
Swapping every fitting to LED is inexpensive and counts towards the score. It rarely changes a band on its own, but it can tip a borderline property over the line.
Hot water & cylinder insulation
An insulated cylinder with a decent jacket, or a well-specified combi, cuts standing losses that the assessment picks up.
Renewables
Solar PV, solar hot water and heat pumps generate on-site energy and can lift a property well beyond C — worth modelling before you commit to the cost.
For landlords
Band C and the MEES rules
Most private rented homes covered by the Minimum Energy Efficiency Standards (MEES) must have an EPC rating of E or above, unless a valid exemption is registered on the national PRS Exemptions Register. Band C is not a legal requirement at the moment.
Many landlords still choose to work towards a C to improve energy efficiency and spread the cost of upgrades over time. Making improvements gradually between tenancies can also be easier than carrying out several measures at once.
If you're not sure where a property currently sits, a fresh assessment is the quickest way to find out — and the recommendations tell you exactly which works would move the score.
EPC rating C questions
What does an EPC rating of C mean?
An EPC rating of C means your property scored between 69 and 80 points on the Standard Assessment Procedure used for Energy Performance Certificates. In practice it describes a reasonably efficient home: insulated to a decent standard, with a modern heating system and low-energy lighting, and cheaper to run than the average UK property, which sits in band D.
Is an EPC rating of C good?
Yes. Band C is generally treated as the benchmark for an efficient home. It is above the UK average, it is comfortably above the current minimum standard for rented homes, and it is the level at which many lenders' green mortgage products become available. Bands A and B are better still, but usually need renewable technology such as solar panels or a heat pump.
How many points is an EPC band C?
The bands are scored out of 100: A is 92–100, B is 81–91, C is 69–80, D is 55–68, E is 39–54, F is 21–38 and G is 1–20. A property on 68 points is a D and only one point away from a C, which is why the recommendations on your certificate are worth reading closely.
Do landlords need an EPC rating of C?
Not currently. Under the Minimum Energy Efficiency Standards (MEES), most private rented homes in England and Wales must have an EPC rating of E or above unless a valid exemption is registered. Band C is not a legal requirement today, but it is the level many landlords are working towards because the direction of policy has been steadily upward.
How do I get from a D to a C?
Most homes make the jump with insulation and heating upgrades rather than anything dramatic. Loft insulation topped up to current depth, cavity wall insulation where the construction allows it, a modern condensing boiler or heat pump, heating controls, and LED lighting throughout will together move a typical D-rated home into band C.
How long does an EPC last and what does one cost?
An EPC is valid for ten years from the date it is lodged on the national register. EcoNestor charges £80 for a domestic EPC, or £130 for an EPC and floor plan together, with reports usually issued within 24 hours after the survey, subject to receiving all required information.