Important Notice
This is an independent information guide. Impact estimates are general indications compiled from Energy Saving Trust publications and industry sources. Actual improvements depend on your property's specific characteristics. Always get professional assessments before proceeding.
Quick Wins: Low Cost, High Impact
According to the Energy Saving Trust, these improvements offer the best return for the lowest investment.
Loft Insulation
According to the Energy Saving Trust, topping up loft insulation to the recommended 270mm depth is one of the most cost-effective energy improvements.
Cavity Wall Insulation
If your property has unfilled cavity walls (common in homes built 1920s-1990s), filling them can significantly improve heat retention.
Draught Proofing
Sealing gaps around windows, doors, and floorboards is one of the cheapest improvements and can be done as a DIY project.
LED Lighting
Replacing all bulbs with LED equivalents is a simple change that EPC assessors specifically check for. Modern LEDs use a fraction of the energy.
Major Improvements: Higher Cost, Bigger Impact
These improvements can jump your rating by multiple bands and are often partially or fully funded by government grants.
Heat Pump Installation
Replacing a gas boiler with a heat pump can significantly improve your EPC rating. The £7,500 BUS grant covers a substantial portion of costs.
Solar Panels
Solar PV generates renewable electricity and can significantly boost your EPC score, especially when combined with battery storage.
Double/Triple Glazing
Upgrading from single to double or triple glazing reduces heat loss through windows and improves comfort.
Check If You Qualify for Free Improvements
Many EPC improvements are fully funded by government grants. Check your eligibility.
Key Eligibility Factors:
- Low-income household
- Property EPC rating D-G
- Owner-occupier or private tenant
Get comprehensive property analysis with grant recommendations, savings estimates, and installer connections.
Full Property AnalysisStep-by-Step: Improving Your EPC
Get Your Current EPC
Check the EPC register or commission a new assessment to understand your starting point.
Review Recommendations
Your EPC lists recommended improvements with estimated costs and potential savings.
Check Grant Eligibility
Use our checker to see if government schemes will fund your improvements.
Get a New EPC
After improvements, commission a new assessment to confirm your improved rating.
Related Guides
EPC Ratings Explained
Understand what each rating band means for energy costs and property value.
Read guide →Cavity Wall Insulation
One of the most effective improvements, often available free through ECO4.
Read guide →ECO4 Grants
Up to £15,000 for free energy efficiency improvements for eligible households.
Read guide →Ready to Improve Your EPC?
Check if government grants will fund your improvements — many homeowners pay nothing.