What is the cost of replacing windows in a house?

Replacing windows in a house is a significant investment that can enhance both the aesthetic and energy efficiency of a home. The cost of window replacement in the UK and Ireland can vary widely based on factors such as the type and quality of windows chosen, the size and number of windows, and the complexity of the installation.

Factors that have an impact on the cost of window replacement

Types and materials

The choice of materials for window replacements— uPVC, wood, or aluminium—significantly impacts the overall cost, each offering distinct benefits and drawbacks. uPVC windows are favoured for their cost-effectiveness and low maintenance, but might lack the strength and aesthetic versatility of more expensive materials. Wooden windows, while offering a classic look and excellent insulation properties, require regular maintenance to prevent weathering and decay. Aluminium windows, on the other hand, provide a durable and modern option with minimal upkeep, but this comes at a higher price point. These materials also differ in their thermal efficiency and sound insulation capabilities, influencing their suitability for different environments and homeowner preferences.

Size and quantity

The cost of window replacement is significantly influenced by the size and quantity of windows. Opting for larger windows or increasing the number of windows results in higher costs due to the use of more materials and increased labour. Additionally, custom sizes and unique shapes require specialised skills and tools, further driving up expenses. The complexity of the installation process can also escalate with designs that deviate from standard measurements, as these require more precise adjustments and customisation during installation. Each additional customisation step compounds the overall cost, making accurate pre-planning essential for managing budget expectations.

What is the cost of replacing windows in a house?Installation complexity

The installation complexity and associated costs for new windows can significantly vary based on several factors. Existing window frames may require modification or reinforcement to support new windows, especially if upgrading to larger or differently styled units. Structural alterations, such as enlarging window openings, can also add to costs, requiring more extensive labour and materials. Additionally, access difficulties, such as high floors or obstructed exteriors, complicate installations and increase labour time, impacting overall costs. Properties with unique architectural features or heritage considerations often need custom solutions, further increasing installation complexity and expense.


Energy efficiency

Choosing energy-efficient windows, like those with double or triple glazing, may come with a higher upfront cost, but they provide significant long-term savings on energy expenses. These advanced windows greatly enhance thermal insulation, drastically reducing heat loss, which lowers the amount of energy needed to keep indoor temperatures comfortable. This results in reduced heating and cooling bills and lessens the environmental impact of your home. Additionally, these better-insulated windows also offer improved sound insulation, enhancing the overall comfort of your living space. While the installation costs can vary—aluminium frames, for instance, tend to be more expensive than uPVC due to their superior quality—the long-term energy savings make energy-efficient windows a smart investment for enhancing the sustainability and efficiency of any property.

Additional costs

It’s also important to consider other potential expenses, such as the removal and disposal of old windows, any necessary repairs to the window surrounds, and VAT on the new windows and installation services.

What is the cost of replacing windows in a house?Importing windows from Poland

Importing windows from Poland is highly favoured among homeowners in the UK and Ireland due to the excellent balance of quality and cost. Polish windows are known for their superior craftsmanship and the use of high-quality materials that meet stringent standards for energy efficiency and safety. The range available includes both contemporary and classic designs, allowing for seamless integration into various architectural styles. This broad selection ensures that homeowners can find windows that both enhance the aesthetic appeal of their properties and contribute to energy conservation and overall home security, all at a price point that undercuts many local alternatives.


In summary, while the initial outlay for replacing windows can be considerable, the long-term benefits — improved home comfort, lower energy costs, and increased property value — make it a worthwhile investment. Considering options like importing windows from suppliers like Fenbro can provide access to high-quality windows at a more affordable price point.