How Much Does It Cost to Improve EPC from D to C?
With rising energy bills and a growing focus on sustainability, a property’s Energy Performance Certificate (EPC) rating has become more important than ever. For homeowners and landlords, improving an EPC rating from D to C is a common goal that not only reduces energy costs but can also significantly increase property value. But what is the real cost involved in making this upgrade?
The answer, frustratingly, is “it depends.” The cost to improve an EPC from D to C can range from a few hundred pounds for simple DIY fixes to over £12,000 for major installations on larger homes. The final figure depends on your property’s size, age, and what measures are already in place. This article breaks down the typical costs and most effective upgrades to help you budget and plan your energy efficiency improvements.
Understanding the Costs: What the Data Says
Recent studies show a wide range of costs for upgrading a property from an EPC rating of D to C. According to research from mortgage broker Habito, the average cost is around £6,155. However, this varies significantly by property type:
- One-bedroom flat: Approximately £3,653
- Small mid-terrace house: Around £6,400
- Large detached house: Can exceed £12,540
These figures highlight that there is no one-size-fits-all price. The key is to identify the most cost-effective measures for your specific property to achieve the 12-point jump typically needed to go from a D to a C rating.
Most Effective Upgrades for an EPC D to C Jump
To make the leap from D to C, you’ll likely need a combination of improvements. Here are some of the most common and impactful upgrades, starting with the most affordable.
1. Low-Cost Wins (Under £500)
- LED Lighting: Swapping all old halogen or incandescent bulbs to LEDs is a quick and cheap way to gain a few EPC points.
- Draught-Proofing: Sealing gaps around windows, doors, and floorboards is a simple DIY job that prevents heat loss.
- Hot Water Cylinder Jacket: If you have a hot water tank, adding a thick insulation jacket is one of the most cost-effective upgrades you can make.
2. Mid-Range Investments (£500 – £5,000)
- Loft Insulation: Topping up your loft insulation to the recommended 270mm is crucial. If you have none, installing it can have a huge impact.
- Cavity Wall Insulation: If your home was built between the 1920s and 1990s, it likely has wall cavities that can be filled with insulation.
- Modern Heating Controls: Installing a smart thermostat and thermostatic radiator valves (TRVs) gives you better control over your heating and is a key recommendation on most EPC reports.
Stop Guessing, Start Calculating with Refurbmate
Tired of vague estimates? To get a clear, data-driven understanding of what it will cost to improve your property’s EPC rating, you need a tool that thinks like a professional. Refurbmate has developed a brand-new, free EPC calculator that does just that.
Instead of relying on national averages, the Refurbmate EPC Calculator analyzes your specific property details to provide a tailored estimate. It helps you understand which upgrades will have the biggest impact on your EPC score and provides a professional-grade cost breakdown for the work.
Stop flying blind. Get the clarity you need to improve your EPC rating and invest in your property with confidence. Use the Refurbmate EPC calculator to create a clear plan and budget for a more energy-efficient home.