Retro Fitting
Retrofitting is essential for enhancing a property’s EPC rating by addressing inefficiencies in insulation, heating, lighting, ventilation and more. Most UK housing was built before modern energy efficiency standard, meaning millions of properties are poorly insulated and costly to heat.
Why Retrofitting is Needed:
- Improve EPC Ratings: Help homeowners and landlords achieve better ratings, increasing property value and marketability.
- Reduce Energy Bills: Lowers energy consumption and utility costs.
- Meet Legal Requirements: Compliance with Minimum Energy Efficiency Standards (MEES), especially for rented properties.
- Cut Carbon Emissions: Supports national and local carbon reduction goals.
- Enhance Comfort: Leads to warmer homes and improved indoor air quality.
Challenges and Positives in Retrofitting for EPC Improvement:
1. Cost vs Benefit
Challenges
Homeowners may hesitate to invest without clear, short-term payback.
Positives
Many retrofit measures (e.g. loft insulation, LED lighting) offer quick payback periods and long-term energy savings. Additionally, improved EPC ratings can increase property value and appeal, especially in the rental and resale markets.
2. Disruption to the Property
Challenges
Retrofitting can be disruptive, especially when installing insulation or upgrading heating systems.
Positives
Many improvements can now be carried out using non-invasive techniques or phased over time to reduce impact. Once completed, they lead to a more comfortable, quieter, and warmer home, improving quality of life.
3. Property and Structure
Challenges
Older buildings may require more complex solutions due to solid walls, heritage features, or lack of cavities.
Positives
Tailored retrofitting solutions can preserve historic character while improving energy performance. Specialist materials and methods (e.g. breathable insulation) are now widely available, and many owners take pride in enhancing period homes sustainably.
4. Access to Funding and Support
Challenges
Some homeowners are unaware of available grants or may not meet eligibility requirements.
Positive
Growing awareness and new government-backed schemes are improving access. Professional advice from DEAs and retrofit coordinators can help clients navigate funding opportunities effectively.
5. Knowledge and Awareness Gaps
Challenges
Many homeowners do not fully understand EOC recommendations or how to implement them.
Positive
This presents an opportunity for DEA Assessors to add real value by educating clients, offering clear guidance, and signposting to qualified installers or local support schemes. Increased awareness often leads to action and investment.
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Retrofitting Costs and Potential Savings for Domestic Properties in the UK.
| Change Made | Average One-Off Cost | Average Bill Saving (Annually) |
| Loft Insulation | £300-£600 | Up to £250 |
| Cavity Wall Insulation | £400-£1,500 | Up to £300 |
| Solid Wall Insulation (Internal or External) | £7,000-£15,000 | Up to £500 |
| Double/Triple Glazing | £3,000-£7,000 | £150-£200 |
| Floor Insulation | £1,000-£2,000 | £30-£110 depending on house type |
| High Efficiency Condensing Boiler | £2,000-£4,000 | Up to £400 |
| Heat Pump Installation | £7,000-£13,000 (minus available grants) | £300-£800 (vs. old electric or old heating) |
| Solar PV (3-4kW system) | £4,000-£8,000 | £200-£400 on electricity, more with battery storage. |
| Draught-Proofing | £100-£400 | £20-£50 |
| Low-Energy Lighting (LEDs) | £50-£100 | £30-£70 |
Once you receive your EPC Report, it will include retrofit suggestions. This part of the report outlines specific improvement you can make to increase the energy efficiency of your property. Each recommendation includes an indicative cost category (low, medium, or high), the estimated annual savings and the potential improvement to your ERC rating.
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