The deadline is closer than it looks
The government has confirmed that from 1 October 2030, every privately rented property in England and Wales must hold a minimum EPC rating of C. That raises the bar from the current minimum of E, and the gap is significant: around 52% of private rented sector homes currently sit below a C. If your property is among them, you have roughly five years to act. That sounds comfortable, but there are two important complications that make early action sensible.
The assessment method is changing first
Before the 2030 deadline arrives, the way EPCs are calculated will itself change. From 1 October 2029, the existing cost-based Energy Efficiency Rating (EER) will be replaced by the Home Energy Model (HEM). The current EER scores a property largely on the estimated cost of heating it, which favours cheap fuels like gas. HEM works differently.
Under HEM, a property is assessed on three things:
- Fabric performance: insulation levels, draught-proofing, window glazing quality
- Heating system efficiency: how well the heating system converts energy into warmth
- Smart readiness: whether the property generates or manages its own energy, for example through solar panels or a battery system
The practical consequence is significant. A modern, efficient gas boiler is unlikely to achieve a C rating under HEM regardless of how well it performs, because gas as a fuel scores poorly on the new model. Many landlords who assumed a boiler upgrade would be sufficient may find they need to go further, potentially installing a heat pump, solar panels, or both. Speak to a qualified energy assessor about your specific property before committing to any upgrade.
EPC validity is shrinking to five years
Under the current rules, an EPC lasts ten years. That changes too: under the new framework, EPCs will be valid for only five years. If your property has an existing certificate issued some years ago, it may expire sooner than you think, and when it does, it will be reassessed under HEM rather than the old model. This is another reason not to assume your current rating tells you where you will stand in 2030.
What upgrades are likely to cost
The government estimates that landlords will need to spend between £6,000 and £10,000 per property to reach a C rating. That figure comes from the January 2026 Warm Homes Plan, which also reduced the spending cap from the previously proposed £15,000 down to £10,000. The cap sets the maximum a landlord is expected to spend before being able to claim an exemption, so it is not a free pass to do nothing: you still need to carry out all cost-effective improvements up to that limit.
Common upgrades that tend to move the needle include:
- Cavity wall or solid wall insulation
- Loft insulation top-up to current standards
- Double or triple glazing where single glazing remains
- Draught-proofing doors, windows, and floors
- Heat pump installation (air source is most common in UK homes)
- Solar photovoltaic panels
Costs vary a great deal depending on property type, age, and what is already in place. A mid-terrace built in the 1970s with cavity walls and a modern boiler will face a very different bill to a solid-wall Victorian end-of-terrace. Get a proper assessment before budgeting.
Grants and funding worth checking
Do not assume you have to cover the full cost yourself. Several funding routes are worth investigating:
- The Warm Homes: Local Grant (administered through local councils) targets lower-income households in energy-inefficient homes, and some landlords with eligible tenants can access it
- Energy suppliers operating under the Energy Company Obligation (ECO4) scheme fund insulation and heating upgrades for qualifying properties
- Some local authorities run their own retrofit programmes; check your council website
Eligibility rules change, so ask our lettings team or contact your local council directly to find out what is currently available in your area.
Plan in stages, not as a lump sum
The worst outcome for a landlord is scrambling in late 2029 or 2030 to book contractors who are overwhelmed with demand, paying premium rates for rushed work. The smarter approach is to treat this as a phased project.
Start with a current EPC assessment, even if your existing certificate has not expired. That gives you a baseline. Then identify which upgrades offer the best rating improvement per pound spent, and tackle them one or two at a time, ideally between tenancies when access is easier. If you hold multiple properties, prioritise the ones with the lowest ratings first.
Getting an assessment under the current model now also gives you a comparison point once HEM arrives. An energy assessor familiar with HEM can give you an informal steer on how your property is likely to perform under the new methodology.
A practical reason beyond compliance
It is worth remembering that an energy-efficient home is an easier home to let. Tenants are paying close attention to energy bills, and a C-rated property with good insulation and a modern heating system is a genuine selling point. Properties with low running costs tend to let faster, attract reliable long-term tenants, and hold their value better. The compliance work is unavoidable, but the benefits are real.
If you are a landlord with properties in our area and you want help thinking through your upgrade plan, get in touch with our lettings team. We can point you towards trusted local assessors and contractors we have worked with.
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