New EPC Scoring System: Metrics Landlords Need to Know

Why the Scoring System Is Changing

The current EPC system uses a single main Energy Efficiency Rating (EER), calculated using the Standard Assessment Procedure (SAP) for new homes or RdSAP for existing ones. It scores a property's predicted running costs on a scale from 1 to 100 and assigns a letter band from A to G. That single number blends building fabric performance, heating system efficiency, and predicted running costs.

The problem, from the government's perspective, is that a single score lets a property compensate for a weak building envelope with a highly efficient boiler, or vice versa. A Victorian terrace with minimal insulation but a modern condensing boiler might scrape into Band D, masking the fact that its walls and roof leak heat. The planned EPC format will show four headline metrics: energy cost, plus three new metrics for fabric performance, heating system, and smart readiness.

The Four Metrics

The government's EPC reform is expected to be introduced between 2027 and 2029 and will replace SAP/RdSAP with the Home Energy Model and a new EPC format:

Energy Cost estimates the property's energy costs under standard assumptions.

Fabric Performance measures how well the building shell retains heat — walls, roof, floor, windows, and airtightness. This metric rewards insulation upgrades, double or triple glazing, and draught reduction. Properties with solid uninsulated walls, single glazing, or uninsulated floors will score poorly regardless of their heating system.

Heating System evaluates the primary heating source. The exact rating thresholds are being set through EPC reform. The government policy lets landlords choose this standard or Smart Readiness, so the 2030 MEES standard will not require replacement of a working gas boiler with a heat pump.

Smart Readiness assesses the property's capacity to use smart technologies and manage energy flexibly. Under the announced 2030 private rented sector policy, landlords would need to meet Band C on Fabric Performance and either Heating System or Smart Readiness; they would not have to meet Band C on all four EPC metrics.

What This Means for Band C Compliance in 2030

Under the government's announced 2030 policy, every in-scope private rented property in England would need Band C on Fabric Performance and either Heating System or Smart Readiness, or a registered exemption under the £10,000 cost cap. The target date is 1 October 2030; enabling legislation is targeted for 2027, so the current statutory minimum remains Band E.

The government's policy response also sets out grandparenting. An EPC lodged before 1 October 2029 that shows Band C or better on the Energy Efficiency Rating can satisfy the planned standard until that EPC expires or is replaced — up to 10 years after lodgement.

Under the announced 2030 standard, a new EPC would need to show Band C on Fabric Performance and either Heating System or Smart Readiness. A gas-heated property that currently scrapes a Band C on its single SAP score might find the heating-system route harder under the new system.

Which Properties Face the Biggest Risk

Older properties with good boilers but poor fabric. If your property achieved a reasonable rating primarily because of a recent boiler replacement, the fabric performance metric will expose the underlying weakness. Victorian and Edwardian terraces, pre-1930 solid-wall properties, and any building with single glazing are in this category.

Gas-heated properties at the C/D border. A property sitting at SAP 69 (low Band C) on the strength of a condensing gas boiler may find the heating-system route harder under the planned standard. The government policy allows landlords to use the Smart Readiness metric as an alternative to the Heating System metric.

Properties with no smart controls. A property with no programmable thermostat or other smart technology may find the Smart Readiness route harder; the exact metric thresholds are part of the EPC reform.

Practical Steps for Landlords

If your property is already Band D or C: Consider a strategic EPC refresh before the methodology changes (see grandparenting your EPC Band C rating for the full strategy). An EPC lodged before 1 October 2029 that shows Band C or better on the Energy Efficiency Rating can satisfy the planned standard until it expires or is replaced.

If your property is Band E: Focus on fabric-first upgrades — insulation, glazing, draught proofing — because those improvements score well under both the current and future systems. A strong fabric score gives you the foundation to meet Band C under the new methodology, even if your heating system metric is weaker.

If you're planning a heating system change: The timing matters. A heat pump may improve the rating under the current system and is reflected in the Heating System metric. It does not guarantee Band C; the announced 2030 policy also allows the Smart Readiness route.

The EPC and MEES compliance guide includes a current-vs-2030 comparison tool that maps your property's position against both the existing single-score system and the planned multi-metric framework, helping you decide whether to act now or wait.

The Bottom Line

The new EPC format will show four headline metrics, while the announced 2030 MEES policy would require Band C on Fabric Performance and either Heating System or Smart Readiness. For most landlords, the strategic response is to consider a Band C EPC before 1 October 2029 and to prioritise insulation upgrades for properties that will face the new methodology — because good fabric performance is central to the planned standard.

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