Last Updated on March 21, 2025

How Much Do Sliding Windows Cost?

Sliding windows are an excellent choice for a variety of homes, providing a sleek, modern look, great ventilation, and easy operation. However, the cost of sliding windows can vary widely depending on factors such as the materials used, the size of the windows, and whether you’re installing them yourself or hiring a professional.

In this guide, we’ll break down the costs of sliding windows, considering various factors that influence pricing, including installation costs, and give you a detailed pricing table based on different sizes and dimensions.

What is the Average Cost of Sliding Windows in the UK

The price of sliding windows can vary greatly, but generally, homeowners can expect to pay anywhere from £150 to £1,200 per window. The main factors that affect pricing include window material, size, and whether the window is standard or custom-made.

Here’s a breakdown of the average cost of sliding windows based on the material:

uPVC Sliding Windows:

• Cost: uPVC windows are the most cost-effective option, offering a good balance of affordability and energy efficiency. They are widely used in residential properties for their durability and low maintenance needs.
• Benefits: Energy-efficient, low-maintenance, and weather-resistant. These windows are ideal for homeowners looking for budget-friendly, long-lasting options.

Aluminium Sliding Windows:

• Cost: Aluminium windows are more expensive than uPVC, offering a sleek, modern look and better performance in terms of strength and durability. They are often chosen for contemporary homes or commercial buildings.
• Benefits: High strength, durability, and slim frames. Aluminium windows also offer excellent energy efficiency when paired with a thermal break.

Wooden (Timber) Sliding Windows:

• Cost: Wooden windows are the most expensive option due to the material’s natural beauty and premium feel. Timber windows can add a classic or traditional charm to a home but may require more maintenance.
• Benefits: Aesthetic appeal, excellent insulation properties, and eco-friendliness when sourced sustainably. Ideal for heritage properties, high-end homes, or those looking for a more natural appearance.

Cost of Sliding Windows by Number of Panels

The number of panels in a sliding window affects its overall cost. Generally, sliding windows are available in 2-panel, 3-panel, and 4-panel designs, with the cost increasing as the number of panels increases due to the added materials and complexity of installation.

Here’s a breakdown of the average costs for sliding windows based on the number of panels:

Note: Prices may vary depending on the supplier, location, custom features, and other factors like energy efficiency, glazing and installation complexity.

2-Panel Sliding Windows: The most common configuration, offering a balance between affordability and functionality. A 2-panel window is typically sufficient for standard-sized openings.

3-Panel Sliding Windows: Provides a wider view and more airflow. It’s often used in larger openings, offering increased functionality but at a slightly higher price due to the additional panel.

4-Panel Sliding Windows: These are ideal for very large spaces or modern designs with wide openings. The extra panel increases both the cost of materials and installation.

Cost of Sliding Windows by Glazing

The type of glazing you choose for your sliding windows plays a significant role in the overall cost. Glazing refers to the layers of glass used in the window, and it directly affects the window’s insulation, energy efficiency, and security. 

The more layers of glass, the higher the cost, but it can provide greater energy savings and improved sound insulation. 

Below is a breakdown of sliding window costs based on different glazing options, including secondary glazing as an alternative.

Single-Glazed Sliding Windows

Single-glazed windows are the most budget-friendly option, but they offer limited insulation and are not as energy-efficient as double or triple glazing.

Double-Glazed Sliding Windows

Double-glazing is a popular choice for residential homes due to its ability to improve energy efficiency and soundproofing compared to single glazing.

Triple-Glazed Sliding Windows

Triple glazing is a premium option that offers superior insulation, reducing heat loss and noise pollution even further than double glazing.

Secondary Glazing

Secondary glazing is a more affordable alternative to double or triple glazing. It involves adding an extra layer of glass to an existing window frame, improving energy efficiency and sound insulation.

Factors That Affect the Cost of Sliding Windows

Material

• uPVC Sliding Windows: uPVC is the most cost-effective option, offering excellent insulation and low maintenance. It is a popular choice for homeowners on a budget.
• Aluminium Sliding Windows: More expensive than uPVC, aluminium windows offer a sleek modern look and are ideal for larger window openings. They are more durable and offer slim profiles for better views.
• Timber Sliding Windows: These are often the most expensive, offering an elegant and traditional aesthetic. Timber windows require more maintenance but are valued for their natural look and insulation properties.

Window Size

The size of the sliding window directly impacts the price. Larger windows require more materials, and larger frames often result in higher installation costs. For example, a large 2400mm x 1500mm timber sliding window could cost more than a standard uPVC sliding window due to the increased material costs.

Installation Costs

Professional installation is often recommended for sliding windows, as they can be tricky to fit. The cost of installation will depend on your location in the UK, the complexity of the installation, and the window’s size.

Energy Efficiency

Double-glazing or triple-glazing will increase the cost of your sliding windows but improve energy efficiency. For homeowners looking to reduce energy bills over time, the extra investment in double-glazed or even triple-glazed windows can be a smart choice.

Window Frames and Trims

Some installations require additional framing or custom trims, which can add to the overall cost.

Security Features

If you want additional security features like lock systems or reinforced frames, expect to pay more.

Removal and Disposal of Old Windows

If you are replacing old windows, some companies may charge an additional fee to remove and dispose of the old windows.

Maintenance

While uPVC is low-maintenance, timber windows will require regular upkeep, including painting and sealing.

Are Sliding Windows Worth the Investment?

When considering new windows for your home, the decision to invest in sliding windows is an important one. Sliding windows have become a popular choice due to their modern design, energy efficiency, and functionality. 

However, as with any home improvement project, it’s essential to weigh the pros and cons to determine if sliding windows are the right choice for your property. 

Below, we explore the key benefits and considerations to help you decide if sliding windows are worth the investment.

Energy Efficiency

Sliding windows, particularly those with double or triple glazing, can significantly reduce heat loss and improve your home’s insulation. This can lead to lower energy bills, especially in the colder months when heating costs tend to rise. 

They are also more airtight than older, single-glazed windows, preventing drafts and moisture buildup.

Space-Saving Design

Unlike traditional windows that open outward or inward, sliding windows open horizontally along a track, making them ideal for tight spaces. 

They don’t take up additional space outside or inside your home, making them perfect for rooms with limited clearance or areas with outdoor furniture, like balconies or patios.

Easy Operation

Sliding windows are known for their smooth operation. The sash moves easily along a track, making them a hassle-free option for homeowners. Additionally, they are easier to maintain and clean, as they typically require less maintenance compared to hinged or casement windows.

Increased Natural Light and Ventilation

Sliding windows are available in large sizes, allowing for expansive views and an abundance of natural light to enter your home. They also provide excellent airflow, especially when paired with multiple panels that can be opened to varying extents for better ventilation.

Aesthetic Appeal

The sleek, modern appearance of sliding windows can complement a variety of home designs, whether you live in a contemporary, minimalist, or traditional-style property. They can enhance the visual appeal of your home while adding functionality.

How to Save on Sliding Window Costs

If you’re looking to save money on your sliding window installation, here are a few tips:

1. Get Multiple Quotes: Always get at least three quotes from different suppliers or installers to ensure you’re getting a competitive price.
2. Choose Standard Sizes: Custom-made windows are often more expensive. If you can use standard-sized windows, you’ll save on both material and installation costs.
3. Opt for uPVC or Aluminium: If you’re on a tight budget, uPVC or aluminium windows offer a balance of quality and cost.
4. Look for Discounts: Many suppliers offer promotions or discounts during off-peak seasons, such as winter.

Get a Free Quote for Your Sliding Windows!

If you’re ready to enhance the look, functionality, and energy efficiency of your home with new sliding windows, we’re here to help. Our team of expert installers can guide you through the process and offer you a competitive quote tailored to your specific needs.

Contact us and request a free, no-obligation quote today and let us help you make an informed decision about your window installation.