Find your Local Installer

Window Replacement Costs

Mar 07 2024

Windows are the eyes of your home, providing views of the outside world while allowing natural light to illuminate your living spaces. However, over time, windows may lose their efficiency, prompting the need for replacement. Understanding the average Window replacement costs associated with this endeavor is crucial for homeowners looking to enhance both the aesthetics and energy efficiency of their residences.

Replacing windows is a substantial investment that pays off in terms of improved aesthetics, energy efficiency, and overall home value.

Average Window replacement costs in the UK

The average cost of window replacement in the UK can vary significantly based on several factors, including geographical location, the type of windows chosen, and the overall scope of the project.

Regional variations play a role in cost differentials, with urban areas often experiencing higher prices due to increased demand and labor costs.

Window Frame

Size (mm)

600 x 900mm

900 x 1200mm

1200 x 1200mm
















Source: Green Match

How Much Does It Cost to Replace a Window?

Breaking down costs for different window types is essential for budget planning. Casement windows, sash windows, and bay windows each come with their own price tags. Material choices, including uPVC, aluminium, and timber, contribute to the overall cost equation.

The cost to replace a window can vary based on several factors. Here are key factors that influence the overall cost:

1. Window Type

Different window types, such as casement, sash, or bay windows, have varying costs. Specialized or custom window types may also impact the overall price.

Window Type
Source: Civiconcept

2. Material

The choice of material for the window frame is a significant cost factor. Common materials include uPVC, aluminum, and timber, each with its own price range.

3. Window Size

Larger or non-standard window sizes often result in higher costs. The amount of material needed and the complexity of installation contribute to this factor.

Window Size
Source: Civiconcepts

4. Installation Complexity

The complexity of the installation process influences costs. Factors such as accessibility, structural modifications, and the need for additional labor can contribute to higher expenses.

5. Energy Efficiency Features

Windows with advanced energy-efficient features, like Low-E coatings, multiple glazing, or gas fills, may have higher upfront costs. However, they can lead to long-term savings on energy bills.

6. Frame Finish and Features

The finish and additional features of the window frame, such as special coatings or built-in blinds, can add to the overall cost.

Frame Finish and Features
Source: Better homes & gardens

7. Brand and Quality

Reputable brands and higher-quality windows may come with a premium price. However, investing in quality materials can contribute to long-term durability and performance.

8. Additional Features

Extras such as decorative elements, grilles, or security features may increase the overall cost.

9. Customization

Custom-designed or uniquely shaped windows will likely have higher costs compared to standard, off-the-shelf options.

10. Geographical Location

Regional variations in labor costs and demand for specific window types can impact the overall cost of window replacement.

11. Removal and Disposal

The cost of removing the old window and disposing of debris should be considered. This is often an overlooked aspect of the overall project cost.

Understanding these factors and obtaining quotes from reputable contractors can help homeowners make informed decisions about the cost to replace their windows. Each project is unique, and considering these elements ensures a more accurate estimation based on individual requirements.


Understanding Window replacement costs is a vital aspect of the decision-making process for homeowners. Armed with knowledge about average costs, calculators, and cost-effective strategies, individuals can embark on this home improvement journey with confidence, ensuring a clearer view of both the outside world and their budget.

Featured in