Preparing for an EPC inspection doesn’t have to be stressful or expensive. Even minor, low-cost improvements can make a noticeable difference to your energy rating. Assessors notice small details, so making quick tweaks before they arrive can improve your score, reduce heat loss, and demonstrate energy efficiency.

If you haven’t booked your assessment yet, you can secure a slot via our Booking Page.

1. Seal Draughts Around Windows and Doors

Draughts are one of the first things assessors notice. Small gaps can significantly impact heat retention.

Quick fixes:

  • Add self-adhesive foam strips to windows and doors

  • Use silicone to seal minor cracks

  • Close unused chimneys with chimney balloons or covers

These simple measures immediately reduce heat loss and improve thermal efficiency.

2. Switch to LED Lighting

Lighting may have a smaller effect than heating, but inefficient bulbs still lower EPC scores.

Fast improvements:

  • Replace incandescent or halogen bulbs with LED equivalents

  • Ensure all bulbs are functional

  • Maintain consistent lighting in every room

LEDs signal modern energy efficiency to assessors.

3. Optimise Your Heating System

Heating systems are heavily weighted in EPC calculations. Even without upgrading the boiler, small changes can help.

Easy pre-assessment adjustments:

  • Set boiler flow temperature between 55–60°C

  • Ensure thermostats and TRVs (thermostatic radiator valves) work properly

  • Enable eco mode if available

Properly functioning heating demonstrates energy efficiency in operation.

4. Bleed Radiators

Trapped air reduces radiator efficiency, which can affect your EPC score.

Steps to fix:

  • Bleed all radiators to remove air pockets

  • Ensure rooms heat evenly

  • Test the system before the assessor arrives

Well-heated rooms indicate a functioning and efficient system.

5. Add Reflective Panels Behind Radiators

Reflective panels push heat back into rooms rather than letting it escape through walls.

  • Quick and inexpensive installation

  • Improves perceived heating efficiency

  • Noticed positively by assessors

6. Insulate Pipes and Loft Hatches

Even minor insulation improvements contribute to EPC performance.

  • Wrap exposed hot water pipes with foam lagging

  • Add insulation around loft hatches

  • Check that existing insulation is continuous

This reduces heat loss and can boost your overall rating.

7. Prepare Documentation for Past Upgrades

Without proof, assessors must assume lower efficiency values.

  • Loft insulation certificates

  • Cavity wall insulation documents

  • Boiler installation papers

  • Window or double glazing proof

For guidance on assessor expectations, visit our About Us – EPC Company London page.

8. Ensure Easy Access for Assessors

Blocked areas can lead to assumptions of inefficiency.

  • Clear loft access

  • Open boiler cupboards and cylinder spaces

  • Ensure meters and heating controls are visible

Accessible areas help assessors provide accurate EPC ratings.

9. Tidy Up and Make the Home Presentable

A clean, organised home signals well-maintained systems.

  • Clear clutter around heating systems

  • Remove obstructions from windows and doors

  • Ensure meters, valves, and insulation are visible

Even minor details can make a difference during inspection.

Boost Your EPC with Small, Effective Changes

Even small, low-cost tweaks can meaningfully improve your EPC rating. These steps are ideal for homeowners, landlords, or anyone preparing for an assessment.