How To Improve EPC Rating

How To Improve EPC Rating
Stephen Day profile photo

Written by Stephen Day

Gas Safe Engineer

30th May, 2025

An Energy Performance Certificate (EPC) rates how energy efficient a property is. The rating ranges from A (very efficient) to G (inefficient).

Key takeaways

  • Enhancing EPC ratings can aid in compliance and increase property value.
  • Insulation and LED lighting are effective improvements.
  • Better energy efficiency reduces environmental impact.
  • Get a new boiler quote, save up to £550 per year (0% APR available).

Improving your home's Energy Performance Certificate (EPC) rating can significantly impact your energy bills and property value. Many homeowners face the challenge of upgrading their EPC from an E to a C rating, often to comply with new rental regulations or to attract buyers and tenants. Key improvements like insulating walls, lofts, and switching to LED lighting are practical steps that can enhance your EPC rating.

An EPC rating measures how energy efficient your property is, ranging from A (very efficient) to G (inefficient). Achieving a better EPC rating not only helps in reducing carbon footprints but also boosts the comfort of the home by maintaining a more consistent temperature. For those looking to sell or rent, a higher EPC rating can make the property more appealing.

Navigating the options to improve this rating requires understanding which adjustments will deliver the most benefits. Upgrading insulation and installing energy-efficient lighting are among the simplest yet most effective strategies. Each step can contribute to turning an average home into a more energy-efficient one, promising long-term savings and sustainability.

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What Is An EPC Rating And Why Does It Matter?

An Energy Performance Certificate (EPC) rates how energy efficient a property is. The rating ranges from A (very efficient) to G (inefficient).

EPCs are important because they help identify areas where a property can improve its energy performance. A better EPC rating often leads to lower energy bills and reduced carbon emissions.

The EPC report provides details about a property’s energy use. It offers recommendations for improvements, making it valuable for homeowners seeking to save energy.

In England and Wales, EPCs are required when a property is built, sold, or rented. They give potential buyers or tenants an idea of energy costs.

An EPC certificate includes an EPC score, which is a numerical representation of the property’s efficiency. Higher scores indicate better energy performance and sustainable living.

Having a good EPC rating can increase property value. It shows that a home is cost-effective and environmentally friendly, appealing to eco-conscious buyers.

Key benefits of improving EPC ratings:

  • Lower energy bills

  • Reduced carbon footprint

  • Improved comfort and efficiency

Focusing on areas such as insulation, heating systems, and renewable energy can boost your EPC rating. Adapting these aspects not only benefits homeowners but also contributes positively to the environment.

Why You Should Care About Your Property’s Energy Efficiency

Energy efficiency is crucial for property owners. An energy-efficient home uses less energy, which can lead to lower energy bills. This is a relief for anyone looking to cut monthly costs. It's not just about savings. Being energy efficient reduces carbon emissions, helping to protect the environment.

Owning an energy-efficient property can also boost property value. Homes with higher energy efficiency ratings are often more attractive to potential buyers. They appreciate the long-term cost savings and the reduced carbon footprint such properties offer.

Reducing energy consumption also means lower heating bills. Efficient heating systems and insulation can make a big difference. Property owners should consider this when planning upgrades or renovations. It’s a smart investment in both the property and the planet.

Furthermore, regulations may require properties to meet minimum energy standards in the future. Staying ahead of these regulations can save time and money. Ensuring a property's compliance now avoids hurried changes later. It’s a proactive measure that offers peace of mind.

Simple Ways To Boost Your EPC Rating

Improving your home's EPC rating can lead to lower energy bills and a more comfortable living environment. By focusing on insulation, efficient heating, and modern lighting, you can make significant improvements.

Add Loft Insulation

Loft insulation is one of the most effective ways to improve your home's energy efficiency. It reduces heat loss through the roof, keeping your home warmer in winter and cooler in summer. Installing insulation with a thickness of at least 270 mm is recommended for optimal efficiency. Materials like fibreglass, mineral wool, or even eco-friendly options like sheep's wool can be considered.

Ensuring all gaps are filled, and installation is done properly, can make a significant difference. Additionally, loft insulation can help in maintaining a steady temperature with less reliance on heating systems, leading to substantial energy savings.

Switch To Energy-Efficient Lighting

Switching to energy-efficient lighting, such as LED bulbs, can contribute significantly to improving your EPC rating. LEDs use up to 80% less energy than traditional incandescent or halogen bulbs and last much longer. By providing the same brightness with less energy, they help to reduce electricity consumption.

Simple changes in lighting can add up to noticeable energy savings over time. It’s important to replace bulbs in all frequently used areas to maximise benefits. Choose fixtures and fittings that accommodate energy-efficient bulbs for the best results.

Install Wall Insulation

Wall insulation plays a crucial role in energy conservation. Cavity wall insulation involves filling the space between the two layers of brick in your walls. For older homes, solid wall insulation might be more appropriate, as it provides a similar barrier against heat loss.

Properly installed wall insulation not only helps maintain indoor temperatures but also saves money on heating bills. It's an investment that increases comfort and energy efficiency, significantly impacting your EPC rating positively.

Add An Insulation Jacket To Your Hot Water Tank

An insulation jacket for your hot water tank is a straightforward way to reduce heat loss. These jackets are relatively inexpensive and easy to fit. By trapping heat within the tank, less energy is required to keep the water hot.

A properly insulated tank not only conserves energy but also ensures hot water availability with minimal reheating. Combine this method with insulating any exposed hot water pipes for enhanced energy conservation and efficiency.

Upgrade To A Modern Boiler

Upgrading to a modern boiler can dramatically improve your home's energy efficiency. Modern boilers are designed to be more efficient, with options like condensing boilers that utilise more energy from the fuel they burn. This can reduce both carbon footprint and energy costs, benefitting your EPC rating.

Integration of thermostatic radiator valves and smart thermostats can further optimise heating. These devices allow for more precise temperature control, preventing unnecessary energy use and maximising savings.

Consider Installing Double Glazing

Double glazing is an excellent way to prevent heat loss and improve your home’s insulation. This technology involves two layers of glass with a gap in between, acting as a barrier to heat loss. It also offers noise reduction and increases comfort levels in your home.

Double glazing is beneficial for maintaining temperature, requiring less energy to heat the home efficiently. It represents a significant improvement for older windows, contributing positively to your EPC rating.

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30th May, 2025

Stephen Day profile photo

Written by Stephen Day

Gas Safe Engineer at iHeat

Stephen Day is a Gas Safe registered and FGAS certified engineer with over 20 years of hands-on experience in the heating, cooling, and renewable energy industry, specialising in boiler installations, air conditioning, and heat pump systems.

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Articles by Stephen Day are reviewed by iHeat’s technical team to ensure accuracy and reliability.