Make My Home Energy Efficient logoMake My Home Energy Efficient

Whole-house EPC C planning

How Can This Property Achieve EPC C?

Answer one practical question: how can this property achieve EPC C? The engine checks the whole property, including heating, insulation, glazing, lighting, solar potential, ventilation, flat position and the evidence needed before improvements can be reflected in an EPC.

Built for practical decisions

  • Checks whether EPC C appears likely, uncertain or difficult.
  • Prioritises the measures most likely to affect the rating.
  • Highlights documentation gaps before reassessment.
  • Explains limitations using clear, homeowner-friendly wording.

The MHEE Property Intelligence Platform uses publicly available EPC data where available together with information provided by the user to generate advisory analysis, recommendations and improvement planning. Results are based on actual EPC data where available but do not constitute a new EPC assessment or official EPC certificate. Where an official EPC assessment is required, this can be arranged through Make My Home Energy Efficient.

Whole-house EPC C assessment

EPCs are modelled using recognised methodology and evidence, not just real-world comfort or perceived efficiency. Improved measures can only be reflected where allowed by RdSAP and supported by suitable evidence.

Fabric, heat loss and flat position

Heating, hot water, lighting and renewables

Evidence, budget and user type

Evidence available
Post-improvement exemption evidence check

Exemption review should only be considered after applicable measures have been installed, evidence has been collected, a post-improvement EPC reassessment has been completed and the reassessed property remains below EPC C.

EPC C Improvement Engine result

How can this property achieve EPC C?

Current EPC

D59

Target

C69

Gap to C

10 points

Feasibility

Likely, subject to evidence and final EPC assessment

EPC C Feasibility

  • EPC C appears likely with targeted improvements
  • This is advisory and subject to evidence, RdSAP inputs and final EPC assessment.

Main Reason Below C

  • Heating controls

Best Route to EPC C

This route is based on the highest-impact weaknesses identified from your answers. It does not guarantee EPC C because the final result depends on modelling, evidence and accredited assessment.

  1. 1. Review internal or external solid wall insulation suitability
  2. 2. Top up loft or roof insulation where suitable
  3. 3. Review solar photovoltaic panel suitability

Priority Improvements

Highest-impact measure

Review internal or external solid wall insulation suitability

Uninsulated solid walls are often a major heat-loss area and can strongly influence the EPC score.

Evidence: Installer specification, insulation thickness, U-value details, photos and completion evidence.

Second-highest-impact measure

Top up loft or roof insulation where suitable

Loft or roof insulation can be one of the simplest ways to reduce modelled heat loss where the roof is exposed.

Evidence: Photos, invoice, insulation depth and product specification.

Supporting measures

  • Review solar photovoltaic panel suitability: Solar PV can improve the EPC model where roof orientation, shading, ownership and installation constraints allow.
  • Improve heating controls: Room thermostat, programmer, thermostatic radiator valves or smart controls may help the EPC model where appropriate.
  • Review floor insulation suitability: Exposed ground floors can contribute to heat loss, especially where there is no dwelling below.

Evidence Needed

  • Invoices and installer details
  • Product or model specifications
  • Photos before and after works where relevant
  • Dates of installation
  • Certificates such as insulation, glazing, MCS or completion evidence where available
  • A post-improvement EPC assessment by an accredited assessor
  • Wall insulation is unknown or assumed. Documentary evidence may be needed before an assessor can fully reflect any completed insulation works.

Limited Impact Measures

  • Replacing existing double glazing may improve comfort, but may not always move the EPC score enough to be the first priority.
  • Glazing can help, but it may not always be the highest-impact EPC route compared with heating, insulation or solar PV.

Risks or Limitations

  • Window age, frame type, U-value, g-value and available evidence can affect how glazing is treated in the EPC assessment.
  • Evidence gaps may prevent improvements being reflected in the EPC model.

Exemption Review Flag

  • Do not consider exemption review yet. First install applicable measures, collect evidence, complete reassessment and confirm the property remains below EPC C.
Heating and High Heat Retention Storage Heater guidance

If current heating is direct electric, electric room heaters, electric panel heaters, radiant ceiling heating or older storage heaters, heating may be a major EPC rating driver. Recognised High Heat Retention Storage Heaters may be worth checking where suitable.

Product listings can change. Always confirm the exact model against the current SAP Product Characteristics Database before purchase or installation. Check the PCDB.

  • Dimplex Quantum
  • Creda Quantum
  • Heatstore Quantum
  • Gabarron / Elnur Ecombi HHR
  • Gabarron HHR Plus
  • Electrorad Thermastore HHR
  • Haverland Eco-Joule
  • Stiebel Eltron
  • Fischer Elektrostore
  • Ecostrad Magma HHR
  • ONYX Storage Heaters

Next Steps

Need a property-specific EPC C plan? Make My Home Energy Efficient can review your current EPC, model improvement options, compare scenarios, and arrange supply and installation of suitable improvement measures through approved installers.

Email ResultFind My EPCCheck My Route to EPC CBook EPC C ReviewRequest Improvement QuoteSpeak to an Assessor

The MHEE Property Intelligence Platform uses publicly available EPC data where available together with information provided by the user to generate advisory analysis, recommendations and improvement planning. Results are based on actual EPC data where available but do not constitute a new EPC assessment or official EPC certificate. Where an official EPC assessment is required, this can be arranged through Make My Home Energy Efficient.

This engine uses wording such as likely, may, subject to evidence and subject to final EPC assessment because EPC outcomes depend on the property, evidence and the current RdSAP methodology.