James Elston
Published March 24, 2025
Last Updated on March 24, 2025
How Much Do Bifold Windows Cost In The UK?
Bifold windows are an excellent choice for homeowners and landlords looking to enhance natural light, improve ventilation, and create a seamless connection between indoor and outdoor spaces. But how much do bifold windows cost in the UK?
The cost of bifold windows depends on factors such as material, size, glazing options, and installation fees. In this guide, we break down the prices, variations, and considerations to help you make an informed decision.
Contents
Factors That Affect the Cost of Bifold Windows
1. Material Type
Choosing the right material for your bifold windows impacts not only the cost but also durability, energy efficiency, and aesthetics. Here’s a breakdown of the three most common materials:
Aluminium bifold windows
Known for their strength, sleek design, and longevity, aluminium bifold windows are a premium option. They offer excellent durability against the elements, are resistant to warping or corrosion, and require minimal maintenance.
Aluminium frames can support larger glass panels with slimmer sightlines, providing a contemporary aesthetic and maximizing natural light.
However, the cost of aluminium windows is typically the most expensive option, especially when combined with thermal break technology for enhanced energy efficiency.
uPVC bifold windows
A budget-friendly alternative, uPVC bifold windows are popular due to their affordability and energy efficiency. They provide good insulation, helping to reduce heat loss and lower energy bills.
However, uPVC is not as strong as aluminium, meaning the frames are often thicker to support the glass. Over time, uPVC may degrade or discolour, particularly in extreme weather conditions, making it less durable than aluminium or timber.
Timber bifold windows
Offering a classic, natural look, timber bifold windows add a touch of warmth and character to any home.
High-quality hardwoods like oak or mahogany ensure durability, but timber requires regular maintenance, such as painting or varnishing, to prevent rot and weather damage. While timber bifold windows provide excellent insulation, they tend to be the most expensive option due to material costs and upkeep.
2. Size and Number of Panels
Bifold windows come in various configurations, typically ranging from two to five panels. The size and number of panels significantly affect pricing:
- Smaller bifold windows (1.2m – 1.8m wide, 2-3 panels) – Ideal for smaller openings, such as kitchen or bathroom windows, these are more affordable and easier to install.
- Medium-sized bifold windows (2.4m – 3m wide, 4-5 panels) – Suitable for larger spaces, such as living rooms or conservatories, these offer expansive views but come at a higher cost due to increased material and labour requirements.
- Larger bifold windows (over 3m wide, 5+ panels) – Custom designs or extra-wide bifold windows can transform an indoor space by opening up an entire wall. However, larger windows require stronger materials (often aluminium) and may involve structural modifications, increasing the overall cost.
Each additional panel increases the price due to extra framing, hinges, and hardware required for smooth operation. The width of each panel also affects functionality, as wider panels may require stronger frames to maintain structural integrity.
3. Glazing Options
The type of glass used in bifold windows plays a crucial role in energy efficiency, security, and sound insulation. Here’s a closer look at the glazing options:
Double glazing
This is the standard choice for bifold windows, consisting of two glass panes separated by an insulating gas layer (usually argon). Double glazing improves thermal efficiency, reducing heat loss and helping to maintain a comfortable indoor temperature.
It also provides good noise reduction, making it ideal for urban homes. Check out our guide on the cost of double glazing windows to learn more.
Triple glazing
An upgrade from double glazing, triple glazing includes an extra pane of glass and another layer of insulating gas. This improves energy efficiency even further, reducing heating costs and enhancing soundproofing.
However, triple glazing is more expensive and adds weight to the window frames, which may require reinforced hinges and support structures.
Toughened or laminated glass
For added safety and security, toughened or laminated glass is recommended. Toughened glass undergoes heat treatment to increase strength, making it more resistant to impact.
Laminated glass consists of multiple layers bonded together, preventing it from shattering upon impact. This is particularly beneficial for ground-floor windows or properties in high-crime areas, though it does increase the cost.
4. Installation Costs
The cost of installing bifold windows varies depending on several factors:
- Standard installation (no structural changes) – If replacing existing windows of a similar size, installation costs are lower, typically ranging from £500 to £800. This includes removing old windows, fitting the new bifold windows, and sealing gaps for insulation.
- Installation requiring structural modifications – If the new bifold windows are larger than the existing window opening, additional work may be needed, such as widening the aperture or adding support beams. This can increase labour costs to £900 – £1,500, depending on the complexity of the work.
- Location-based cost variations – Labour costs fluctuate based on region, with London and the South East generally having higher installation fees than other parts of the UK.
- Additional features – Extras such as integrated blinds, smart glass, or custom finishes can add to both material and labour costs.
Bifold Window Cost Breakdown
In general, the cost of new windows depends on various factors, including the type of material, glazing options, window size, and installation requirements.
Below is a general pricing table for bifold windows based on size, material, and glazing. Prices include VAT but exclude installation fees.
Bifold Window Cost by Material
| Window Size (Width x Height) | uPVC Bifold Windows | Aluminium Bifold Windows | Timber Bifold Windows |
|---|---|---|---|
| 1.2m x 1.2m (2 panels) | £900 – £1,400 | £1,200 – £1,800 | £1,500 – £2,200 |
| 1.8m x 1.2m (3 panels) | £1,100 – £1,700 | £1,500 – £2,300 | £1,800 – £2,700 |
| 2.4m x 1.2m (4 panels) | £1,400 – £2,200 | £1,900 – £3,000 | £2,200 – £3,500 |
| 3.0m x 1.2m (5 panels) | £1,800 – £2,600 | £2,500 – £3,800 | £2,800 – £4,200 |
Bifold Window Cost by Glazing Type
| Glazing Type | Estimated Additional Cost |
|---|---|
| Standard Double Glazing | Included in base price |
| Triple Glazing | +£250 – £600 per window |
| Toughened/Laminated Glass | +£300 – £700 per window |
Installation Costs for Bifold Windows
| Installation Type | Estimated Cost |
|---|---|
| Standard Installation (No Structural Changes) | £500 – £800 |
| Installation with Structural Adjustments | £900 – £1,500 |
Are Bifold Windows Worth the Cost?
| Pros |
| Cons |
If you’re unsure whether bifold windows are the best choice for your home, visit our window replacement quotes page to compare different window styles and find the perfect fit for your needs.
How to Save Money on Bifold Windows
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James Elston
Boiler Expert
James Elston is the top boiler replacement and heating expert at Eco Happy. He has over 20 years of experience in the industry, focusing on Gas Safe boiler installations and offering home-heating and energy-saving solutions to homeowners across the UK. From sourcing the most energy-efficient combi boiler to providing specialist heating advice, James ensures that Eco Happy maintains the highest standards and best customer service.