Are you assuming that your rental property will automatically qualify for an exemption from the 2030 EPC C rules? Or have you assumed that no exemption exists and that every property must simply reach Band C, regardless of cost or technical risk?
Both assumptions could create an expensive compliance problem.
New NRLA research, published this week, found that 28% of landlords were unaware that energy-efficiency exemptions existed at all. Fewer than 2% had registered an exemption during the previous two years.
That matters because there were already just over 10,000 exemptions on the register by March 2026, including 854 solid wall insulation exemptions and more than 4,000 domestic properties that had reached the existing £3,500 cost cap.
The message is clear: an exemption is neither an automatic escape route nor something landlords should ignore. It is a formal, evidence-based compliance route that must be properly assessed, documented and registered.
What landlords need to know about EPC C by 2030
The published policy position is that all privately rented homes in England and Wales within the Minimum Energy Efficiency Standards (MEES) regime must reach the equivalent of EPC Band C by 1 October 2030.
This is a single compliance deadline for new and existing tenancies.
However, the future EPC framework will not simply replicate the current certificate. The proposed reformed system will use four headline metrics:
- Fabric performance
- Heating system
- Smart readiness
- Energy cost
Energy use and carbon emissions are expected to appear as secondary information. For privately rented homes, the practical route is expected to require the property to meet the fabric performance metric, alongside either the heating system or smart readiness metric.
The new Home Energy Model (HEM) methodology is expected to become available for calculation in late 2027. It will run alongside the current RdSAP methodology until October 2029.
That creates a major planning issue: an EPC C rating on today’s certificate may not be equivalent to EPC C under the future metrics.
The importance of the 2029 grandparenting date
A property that achieves EPC C or higher under the existing methodology before 1 October 2029 is expected to be recognised as compliant until that EPC expires or is replaced.
This means that the certificate date matters.
Landlords should not simply record the current EPC rating. You should also audit:
- The date the EPC was issued
- Its expiry date
- Whether it reaches Band C under the current methodology
- Whether planned works could improve the rating before 1 October 2029
- Whether replacing the certificate early could affect transitional protection
Timing an assessment can be as important as timing the works. The HCR Law summary of the Warm Homes Plan provides further context on the proposed timetable and transitional arrangements.
The enhanced exemptions regime is not a blank cheque
In a written parliamentary answer associated with question 22180, energy minister Martin McCluskey confirmed that the government is designing an “enhanced exemptions regime” intended to recognise the characteristics of individual properties.
That wording is important. It suggests that government recognises there is no one-size-fits-all approach to older, complex or hard-to-treat buildings.
The proposed routes include:
- A £10,000 per-property cost cap over a 10-year period
- A lower cap where £10,000 would represent 10% or more of a property valued below £100,000
- A solid wall insulation exemption
- A property value exemption
- A third-party consent exemption, which may be particularly relevant to flats where freeholder consent cannot be obtained
Propertymark has also warned that many older, pre-1919, solid-wall and heritage properties could struggle within the proposed cap. The organisation supports longer exemption validity within the £10,000 framework.
However, the detail remains subject to regulations and further guidance. Landlords should not treat a policy announcement as proof that a property is already exempt.
Why an old EPC is not a retrofit design document
An EPC is useful evidence of a property’s energy performance under a particular methodology. It is not a whole-house retrofit design.
An EPC generally does not provide enough information about:
- Actual construction type
- The condition of walls, roofs and floors
- Damp and mould history
- Ventilation performance
- Occupancy patterns
- Previous improvement work
- Existing defects
- Moisture risk
- Junctions and thermal bridges
- Practical installation constraints
This is where a professional Retrofit Assessment adds value.
A qualified Retrofit Assessor examines how the building actually performs and how its construction, condition and occupants affect the choice of measures. A Victorian solid-wall terrace, a 1960s cavity-wall house and a modern property with previous insulation work may all have the same EPC rating, but they should not receive the same retrofit plan.
Measure modelling separates a genuine exemption from poor design
A landlord may be told that a property cannot reach EPC C within the £10,000 cap. But is that because the building genuinely cannot reach the target without disproportionate cost?
Or is it because the proposed package is poorly sequenced, based on incomplete information or missing lower-cost measures?
Retrofit measure modelling helps answer that question.
It allows you to compare possible improvement packages, assess value for money and understand whether:
- The property can reasonably reach the required standard
- The next measure would exceed the applicable cost cap
- A different combination of measures could produce a better result
- A proposed exemption is technically and financially defensible
Without this analysis, an exemption application may be based on an under-designed solution rather than a genuine property constraint.
PAS 2035 compliance protects the exemption evidence trail
Where work is grant-funded, landlords and delivery organisations should expect robust compliance requirements. Installation should be undertaken by a PAS 2030:2023 certified installer, supported by a PAS 2035-compliant assessment and oversight from a qualified Retrofit Coordinator.
A fabric-first approach is essential.
This means considering the building envelope, ventilation and moisture risk before selecting heating or other technologies. It also means ensuring that measures are sequenced properly and that the evidence trail is maintained from assessment through to completion.
Our Retrofit Coordination Services help keep the process aligned across:
- Assessment and design
- Risk management
- Ventilation strategy
- Installer requirements
- Site inspections
- Evidence collection
- Handover and lodgement
An exemption is not stronger simply because more money has been spent. It is stronger when the works, costs, technical decisions and property constraints are clearly evidenced.
When cheap retrofit work creates a remediation problem
Some landlords will already have completed low-cost improvement work. Others may inherit properties where insulation, ventilation or heating measures were installed without adequate coordination.
The result can be a property that has incurred expenditure but still has:
- Damp or mould concerns
- Poor ventilation
- Incomplete insulation
- Cold bridging
- Defective junctions
- Inconsistent documentation
- An EPC rating that has not improved as expected
This is where Retrofit remediation services become essential.
Remediation is not simply about repairing visible defects. It is about understanding why the original package failed and establishing what needs to happen next without creating further risk.
Our team began as retrofit installers before becoming assessors, coordinators and technical monitors. That practical background gives us a clear view of the gap between what a certificate says and what a building actually does.
We can support landlords, housing providers and installers with independent technical review, remedial planning and evidence-led next steps.
A practical action plan for landlords
To prepare for EPC C by 2030 for landlords, we recommend taking the following steps now.
1. Audit the portfolio
For every property, record:
- Current EPC rating
- EPC issue and expiry date
- Construction type
- Existing energy-efficiency measures
- Damp and mould history
- Ventilation arrangements
- Listed or conservation constraints
- Freeholder or third-party consent requirements
- Previous invoices and technical reports
2. Commission a proper Retrofit Assessment
Do not rely on the EPC alone. Use a Retrofit Assessor to establish the building’s condition, risks and realistic improvement options.
3. Model the measures
Compare packages against the future fabric and secondary metrics. Establish whether the property is genuinely likely to be a cost-cap case or whether a better-designed package could reach compliance.
4. Confirm the exemption route
If an exemption may apply, identify the correct route and gather supporting evidence. Depending on the circumstances, this could include:
- Quotes and invoices
- Specialist technical reports
- Valuations
- Planning or listed-building correspondence
- Freeholder consent requests and refusals
- Records of completed measures
Remember: an exemption is not automatic. It must be registered on the relevant register before it can be relied upon.
5. Plan testing and monitoring
Air leakage and ventilation should not be treated as afterthoughts. Our Air Pressure Testing service can help establish building performance before and after works.
Independent C3 Technical Monitoring provides additional assurance that installations meet the required specification and that evidence is suitable for audit.
6. Budget remediation into asset management
Do not wait until 2029 to discover that an earlier improvement package has failed. Include inspection, testing and potential remediation within the planned asset management budget.
The route to Warm Homes Agency compliance and EPC C
The exemption gap is not just a landlord issue. It affects letting agents, block managers, social housing providers, accreditation bodies, councils, ECO installers and policy stakeholders.
The organisations most likely to succeed will be those that treat compliance as a managed property process rather than a last-minute EPC exercise.
At CPH Retrofit, we provide a one-stop shop covering Retrofit Assessment, Retrofit Coordination, measure modelling, PAS 2030 Consultancy, technical monitoring and remediation support. With more than 15 years of hands-on experience, we understand the technical, regulatory and practical demands of modern retrofit.
If you need support preparing your portfolio, reviewing an exemption case or planning a compliant route to EPC C, contact our expert team.
This article reflects published policy and guidance available in September 2026. Warm Homes Agency arrangements, EPC metrics and exemption rules remain subject to further implementation, regulations and guidance updates.
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