Exploring Energy Efficiency Upgrades for Domestic Properties


Improving energy efficiency in domestic properties is crucial for reducing carbon emissions, lowering energy bills, and creating sustainable homes. This technical blog post aims to provide a comprehensive guide to energy efficiency upgrades, outlining the key areas of improvement and offering example costs for UK homeowners to consider.

Insulation Upgrades

Insulation is a fundamental aspect of energy efficiency. Here are some common insulation upgrades and their approximate costs for an average UK home:

Loft Insulation: Installing or topping up loft insulation can cost between £300 and £500, depending on the size and accessibility of the loft.

Cavity Wall Insulation: The cost for cavity wall insulation ranges from £600 to £1,250, depending on the size and construction of the property.

Floor Insulation: Installing floor insulation can cost between £1,000 and £2,000, depending on the size and complexity of the project.

Efficient Heating Systems

Upgrading heating systems can significantly improve energy efficiency. Consider the following upgrades and their approximate costs:

Condensing Boiler: Replacing an old boiler with a condensing boiler can cost between £2,000 and £3,500, including installation.

Heat Pump: Installing an air source heat pump can range from £8,000 to £15,000, depending on the size of the property and the system’s complexity.

Energy-Efficient Windows and Doors

Upgrading windows and doors can improve insulation and reduce heat loss. Here are some example costs:

Double Glazing: Replacing single-glazed windows with double glazing can cost between £3,000 and £7,000 for an average-sized house.

Triple Glazing: Installing triple glazing can range from £5,000 to £10,000, depending on the size and number of windows.

Energy-Efficient Doors: Replacing doors with energy-efficient models can cost between £500 and £2,000 per door, depending on the type and materials.

Efficient Lighting and Appliances

Upgrading lighting and appliances can lead to significant energy savings. Here are some example costs:

LED Lighting: Replacing traditional bulbs with LED bulbs can cost between £5 and £10 per bulb, depending on the type and brand.

Energy-Efficient Appliances: Upgrading appliances such as refrigerators, washing machines, and dishwashers with energy-efficient models can range from £300 to £1,000 per appliance.

Renewable Energy Systems

Integrating renewable energy systems can provide long-term energy savings. Consider the following example costs:

Solar Panels: Installing a solar panel system can range from £4,000 to £8,000 per kWp (kilowatt peak) installed, depending on the size and complexity of the system.

Solar Thermal Systems: Installing a solar thermal system for hot water can cost between £3,000 and £6,000, depending on the system size and complexity.


Improving energy efficiency in UK domestic properties requires various upgrades across insulation, heating systems, windows and doors, lighting, appliances, and renewable energy systems. While the costs provided above are approximate, they serve as a general guide for homeowners considering energy efficiency upgrades. It’s essential to obtain detailed quotes from reputable contractors and consider the long-term savings in energy bills when evaluating the investment. By investing in energy efficiency upgrades, UK homeowners can contribute to a greener future while enjoying the benefits of reduced energy consumption and lower utility costs. If you would like some help getting started click on this link and select Create My Plan. Our Home Retrofit App will help you understand the benefits of different retrofit measures on improving energy performance.

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