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# EPC Reform 2026-27: What the New Four-Metric System Means for Landlords
- URL: https://www.logbook.co.uk/epc-reform-2026-four-metric-system-landlords/
- Published: 2026-06-08T15:40:26.000Z
- Updated: 2026-08-19T20:13:56.000Z
- Description: The reformed UK EPC scraps the single rating for four metrics, fabric performance, heating, smart readiness, and cost. Launch now slated for late 2027, but the 2030 EPC C rental deadline stands. What landlords need to plan for.
- Author: Jamie Dawson
- Tags: News & Updates, Property Logbooks

> **What's changing:** The UK's Energy Performance Certificate is being reformed from a single A-G rating to **four separate metrics**: fabric performance, heating system efficiency, smart readiness, and estimated energy cost. The new-style EPC was planned for October 2026 but, as confirmed in March 2026, the launch has been pushed to the **second half of 2027**. Critically, the **2030 deadline stands**: from 1 October 2030, all private rentals must meet an EPC C equivalent. Landlords should act on **fabric improvements** now, because fabric performance becomes mandatory for compliance.

## The shift from one rating to four metrics

The current EPC gives a single A-G rating dominated by estimated energy cost. The reformed EPC, built on the new Home Energy Model (HEM), replacing the older RdSAP methodology, splits this into four headline metrics:

- **Fabric performance**: how well the building retains heat (insulation, glazing, draught-proofing)
- **Heating system**: the efficiency and carbon intensity of the heat source
- **Smart readiness**: capacity to integrate with smart controls and demand response
- **Estimated energy cost**: an annual running-cost indicator

## The timeline (and the delay)

- **Originally October 2026**: the planned launch of the new-style EPC
- **Now second half of 2027**: confirmed in March 2026, with the exact date to be agreed by summer 2026
- **1 October 2030**: the deadline for all private rentals to meet EPC C equivalent (this has NOT moved)

The format delay does not relax the 2030 rental requirement, landlords still need to be planning improvements now.

## The gas boiler cap, a big deal for landlords

Under the Government's January 2026 HEM:EPC consultation proposals, fossil-fuel heating (including efficient condensing gas boilers) would be capped at **Band D on the Heating System metric**. To reach Band C overall, the proposed approach is that a property would need Band C on **fabric performance plus either the heating system or smart readiness metric**.

The practical implication: a gas-heated property can still reach compliance, but it must lean on strong fabric performance and/or smart readiness, fabric upgrades become essential, not optional.

## Why fabric performance is the priority

Under the new system, fabric performance is a mandatory component of compliance. That makes these the highest-priority landlord investments:

- Cavity wall insulation
- Loft insulation
- Double or triple glazing
- Draught-proofing
- Floor insulation

These count toward the new metrics and the 2030 EPC C requirement regardless of the exact launch date, so they're safe to act on now.

## What landlords should do now

1. Check your current EPC rating and expiry
2. Prioritise fabric improvements (insulation, glazing, draught-proofing)
3. Consider heating system upgrades where fabric alone won't reach Band C
4. Keep all improvement records and certificates with your property logbook
5. Budget ahead of the 2030 deadline, costs and installer availability tighten as it approaches

See our related guides: [EICR for landlords](https://www.logbook.co.uk/electrical-installation-condition-reports-what-uk-law-requires/), [solar certification](https://www.logbook.co.uk/solar-panel-certification-uk-mcs-dno-building-regs/), and [property logbook for house sales](https://www.logbook.co.uk/property-logbook-house-sale-uk-2/).

## FAQs

### Has the 2030 EPC C deadline been delayed too?

No. Only the EPC format reform was delayed (to H2 2027). The requirement for private rentals to reach EPC C equivalent by 1 October 2030 stands under the proposed MEES.

### Will my current EPC still be valid?

Existing EPCs remain valid for their 10-year life. New-style EPCs apply to assessments carried out after the reform launches.

### Do I need to replace my gas boiler?

Not necessarily, but under the proposals, gas heating is capped at Band D on the heating metric, so a gas-heated property must rely on strong fabric performance (and/or smart readiness) to reach Band C overall.

### What is the Home Energy Model (HEM)?

HEM is the new assessment methodology replacing RdSAP. It underpins the four-metric EPC and aims to model real building energy performance more accurately.

## Sources

- [GOV.UK: Energy Performance of Buildings consultations](https://www.gov.uk/government/consultations?ref=logbook.co.uk)
- Home Energy Model (HEM) technical documentation
- MHCLG / DESNZ EPC reform announcements (March 2026)

*Published 2026-06-08 by Jamie Dawson, Editor. Corrections:* [*corrections@logbook.co.uk*](mailto:corrections@logbook.co.uk)