Which Home Improvements Can Raise an EPC Rating?

Start with the current certificate

The recommendation report ranks modelled measures for that property. Common suggestions include loft or wall insulation, improved heating controls, hot-water cylinder insulation, low-energy lighting, glazing upgrades and renewable technologies.

Prioritise measures that solve real comfort, maintenance or running-cost problems as well as changing a model. The best sequence depends on construction, condition, occupancy, budget and future plans.

Fabric before complex systems

Reducing heat loss can improve comfort and may reduce the heating capacity needed later. Loft insulation is often simpler than solid-wall insulation, while wall treatments require careful design to manage moisture, ventilation, detailing and heritage constraints.

Heating upgrades can influence an EPC, but controls and system efficiency must be matched to the building. Replacing a working system solely for an estimated EPC gain may not be the best financial or environmental decision.

• Check insulation condition and continuity
• Review heating and hot-water controls
• Replace remaining inefficient lamps
• Investigate draughts without blocking required ventilation
• Obtain specialist design for wall insulation or low-carbon heating

Evidence the completed work

Retain invoices, product details, guarantees, commissioning certificates and building-control records. A future assessor can only record improvements in line with the approved evidence rules.

If achieving a particular band is essential, ask an appropriately qualified professional to model proposed works before spending. An EPC recommendation is not a guarantee that one isolated measure will produce a specific score.