EPC band C covers SAP scores from 69 to 80. It is not the current legal minimum for private rentals, but the government has proposed making it mandatory for all tenancies from 1 October 2030. EPCGuide's analysis of the domestic EPC register for England and Wales shows 52.7% of privately rented homes are currently below band C, meaning more than half the private rented sector needs to act before that date if the proposal passes into law.
This guide explains what band C means, how it is assessed, and what landlords with D or E-rated properties need to do to reach it.
What Is an EPC C Rating?
An EPC C rating means the property scores between 69 and 80 on the Standard Assessment Procedure (SAP) scale. SAP runs from 1 (worst) to 100 (best). Band C sits in the upper-middle of the scale, above D, E, F and G, and below the B and A bands most new builds achieve.
| EPC Band | SAP Score | Status for Landlords |
|---|---|---|
| A | 92-100 | Compliant (above proposed 2030 target) |
| B | 81-91 | Compliant (above proposed 2030 target) |
| C | 69-80 | Proposed 2030 legal minimum |
| D | 55-68 | Compliant today, below proposed 2030 target |
| E | 39-54 | Current legal minimum, below proposed 2030 target |
| F | 21-38 | Illegal to let without exemption (current law) |
| G | 1-20 | Illegal to let without exemption (current law) |
A typical band C property has effective loft insulation, a modern boiler or heat pump, and cavity wall insulation where the construction type allows it. It is not the same as a near-perfect rating: band C still leaves room for improvement, but it represents a well-insulated, reasonably efficient home.
Can You Rent Out a Band C Property?
Yes, and without any restriction. Band C sits above the current legal minimum of band E under the Minimum Energy Efficiency Standards (MEES) Regulations (SI 2015/962). A band C property is fully compliant today. No exemption, no registration, no action required.
Under the government's proposal, band C also becomes the new legal floor from 1 October 2030. That means a band C landlord faces no cliff-edge: the property already meets both the current standard and the proposed future one.
MEES applies to England and Wales only. Scotland requires a minimum of band D now, with band C proposed as a Scottish target by the end of 2028. Northern Ireland has a separate framework. The Scottish EPC landlord guide and Northern Ireland guide cover those rules separately.
Why Does Band C Matter So Much?
Band C is the proposed legal target for the entire private rented sector by 2030. On 21 January 2026, the government published its response to the 2023 MEES consultation, confirming its intention to raise the minimum from band E to band C for all tenancies from 1 October 2030. The proposed rules also set:
- A £10,000 cost cap per property (proposed, not in force)
- A £30,000 maximum penalty for non-compliance (proposed, not in force)
- Eligibility of EPC improvements commissioned from 1 October 2025 toward the future cost cap
Those figures are proposals. Two steps must happen before they become law: an Act of Parliament (targeted for 2027, not yet introduced as a Bill) and a Statutory Instrument laid under it. The Renters Rights Act 2025 did not raise the penalty or change the EPC minimum. Band E remains the legal floor until Parliament acts.
Even so, reaching band C now has practical advantages. Work started today counts toward the future cost cap, and the ECO4 grant scheme, which can fund most of the cost for eligible properties, closes on 31 December 2026.
For the full 2030 timeline, see our EPC C 2030 deadline guide.
How Many Properties Are Below Band C?
EPCGuide's analysis of 29.2 million EPC records (March 2026 extract, certificates) shows 55.4% of all EPC certificates in England and Wales are below band C. On a homes basis (counting only the most recent certificate per property), 49.4% of the 20.4 million assessed homes fall below C, which equals approximately 10.1 million properties.
The proportion varies sharply by geography. Among local authorities with at least 10,000 certificates in the March 2026 extract, Gwynedd has the highest share below C, at 74.3% of certificates, and Tower Hamlets the lowest, at 24.9%: a gap of 49.4 percentage points.
For the breakdown by your local authority, see the EPCGuide research hub.
What Does It Cost to Reach Band C from Band D?
A band D property scores SAP 55-68. Reaching band C at SAP 69 means closing a gap of between 1 and 14 SAP points, depending on where in the D band the property currently sits. For a property at the top of band D (SAP 68), a single targeted measure can close the gap.
Common improvements for D-rated properties:
| Improvement | Cost |
|---|---|
| Loft insulation (absent or under 100mm) | Get quotes |
| Cavity wall insulation | Get quotes |
| Heating controls (programmer, TRVs) | Get quotes |
| Hot water cylinder insulation jacket | £15 to £30 (GOV.UK sample EPC, indicative) |
| LED lighting (partial) | £20 for low energy lighting (GOV.UK sample EPC, indicative) |
No government source publishes a standard SAP point gain for these measures, so we do not quote one. How far each measure moves a given home depends on the home. The recommendations on its EPC show a potential rating for each measure. GOV.UK's sample EPC publishes no price for loft insulation, cavity wall insulation or heating controls, so get quotes for those.
What Does It Cost to Reach Band C from Band E?
A band E property scores SAP 39-54. Reaching band C requires gaining 15-30 SAP points. Properties at SAP 54 need 15 points; those at SAP 39 need 30, which usually takes more than one improvement.
| Improvement | Cost |
|---|---|
| Loft insulation (absent) | Get quotes |
| Cavity wall insulation | Get quotes |
| High-efficiency condensing boiler | Get quotes |
| Solid wall insulation (external or internal). Cost is the sample EPC figure in GOV.UK's landlord guidance, indicative | £4,000 to £14,000 |
| Air source heat pump | Get quotes. The Boiler Upgrade Scheme pays £7,500 toward an air source or ground source heat pump |
Cavity-walled E-rated properties with absent loft insulation have the cheaper routes. Solid-walled E-rated properties face higher costs: wall insulation is a major route but also the most expensive, and those properties may qualify for a cost cap exemption under the proposed 2030 rules if spending reaches the proposed £10,000 cap and the property still cannot achieve C.
For a full breakdown, see our band E to C upgrade guide and cost to improve EPC rating guide.
What Grants Are Available?
ECO4 (closes 31 December 2026). The Energy Company Obligation funds insulation and heating upgrades in rented homes rated E, F or G, so a rental already at D does not qualify. There is no set amount per property: the energy supplier decides how much to fund. You may be asked to contribute. Eligibility is tenant-gated: your tenant must receive qualifying benefits such as Universal Credit, Housing Benefit or Pension Credit, or be declared eligible by the local council. After 31 December 2026 the scheme closes, replaced by the Warm Homes Plan from 2027, though landlord eligibility for that plan is not yet confirmed. See the ECO4 landlord guide.
Boiler Upgrade Scheme (BUS). BUS pays £7,500 towards an air source or ground source heat pump, or £2,500 towards an air-to-air heat pump, in England and Wales. Landlords are eligible. It is not means-tested. A heat pump in a well-insulated property can be the decisive measure for a D or E-rated property trying to cross into band C. See the BUS landlord guide.
For the full grants picture, see our guide to every landlord energy grant.
Frequently Asked Questions
What SAP score is EPC band C? Band C covers SAP scores from 69 to 80. SAP runs from 1 (least efficient) to 100 (most efficient), as defined in the Standard Assessment Procedure published by the Building Research Establishment for the government. A score of 69 is the lowest point in band C; a score of 80 sits one point below band B.
Is band C the current legal minimum for landlords? No. The current legal minimum is band E under MEES (SI 2015/962). Band C is the government's proposed minimum from 1 October 2030. That proposal requires an Act of Parliament and a Statutory Instrument to become law, neither of which has been introduced yet.
What percentage of rental properties are below band C? EPCGuide's analysis of the domestic EPC register for England and Wales shows 52.7% of privately rented homes (approximately 1.8 million of 3.5 million) are below band C. Source: EPCGuide analysis of the 13 October 2026 GOV.UK register file, counting the newest certificate per home.
How many SAP points do I need to gain to reach band C from D? A band D property sits at SAP 55-68. To enter band C at SAP 69, you need to add between 1 and 14 SAP points depending on your current score. The recommendations on your EPC show a potential rating for each measure, so check which combination reaches C.
Does a new boiler move a property to band C? A high-efficiency condensing boiler can raise the rating, most clearly where it replaces an old non-condensing unit. Whether that is enough to reach band C depends on the starting score. The recommendations on your EPC show the potential rating for the boiler measure. A property well below band C is likely to need additional measures such as loft or wall insulation too. See our boiler upgrade guide for landlords.
What happens if my property is still below band C when the 2030 law comes in? Under the proposed rules, you would be unable to let the property without a registered exemption, and the proposed penalty is up to £30,000. Those figures are not yet law. If the Act and SI are passed on the 2027 timetable, you would have roughly three years from that point to comply. For properties already at D or E, that is achievable with targeted improvements and available grants.