How Much Do Aluminium Windows Cost?

How Much Do Aluminium Windows Cost in the UK?

Aluminium windows in the UK typically cost £400–£600 for a standard window, or £643–£1,650 for a double glazed aluminium window depending on size and style. A 1000mm × 1000mm two-pane casement costs around £540–£960, and triple glazed aluminium windows cost around £500 per m² – roughly £3,900 for an eight-window semi-detached house.

Timber and uPVC are giving way to aluminium, and the reasons are easy to see: slim frames, more glass, exceptional durability and 100% recyclability. Aluminium suits modern, traditional, period and heritage properties alike, and the best systems are highly energy efficient with almost no maintenance.

It isn't the cheapest option — but it lasts. Here's what you can expect to pay.

What Are Typical Aluminium Window Prices by Type?

How Much Do Aluminium Casement Windows Cost by Size?

How Much Do Triple Glazed Aluminium Windows Cost for a Whole House?

Triple glazed aluminium windows cost around £500 per m². For a whole property that works out at about £1,950 for a two-bedroom flat (four windows), £2,500 for a two-bedroom terrace (five windows), £3,900 for a semi-detached house (eight windows) and around £6,000 for a larger home with 12 windows.

Which Upgrades Increase the Price of Aluminium Windows?

Colour is the most predictable upgrade: RAL powder coating typically adds 10–15% over standard white. Decorative or obscure glass, enhanced security hardware, upgraded thermal performance and premium handles or trims also add cost, depending on the specification you choose. If you want a colour change later, see whether you can paint powder coated aluminium windows.

What Affects the Price of Aluminium Windows?

Size, window style, glazing and colour are the biggest price factors. Larger windows, sash and bay designs, triple glazing and non-standard RAL colours all push the price up, as do extras such as decorative glass, security upgrades and difficult installation access. Compare styles in our guide to the different types of aluminium windows.

No matter how much you spend on aluminium windows, you will get an outstanding degree of performance, but the overall cost still changes with size and specification. Just as with other home improvements, the size of your aluminium windows affects prices.

For example, the price of double-glazed aluminium windows can vary from £643.00 to £1,650 depending on the size, type, and window design. A two-pane aluminium casement window (1000mm x 1000mm) will typically range from £540–£960. Sash windows are more expensive, with prices reaching £1,500.

You may want to go for decorative glass. Perhaps you're looking for additional thermal efficiency features, or maybe security is your number one priority. Any design or styling choices, like the colour, size, or accessories, will add to the cost and can also increase installation costs.

How much do triple-glazed aluminium windows cost?

The cost of triple-glazed aluminium windows is dependent on the size. Many suppliers provide a price per square metre and the average cost in the UK tends to be around £500 per m2.

On average, a triple-glazed window will cost £500. Triple glazing is recommended for colder regions, whereas double glazing will suffice in more moderate climates.

For a typical two-bedroom flat with four windows, expect to pay £1,950. A two-bedroom terrace with five windows will set you back £2,500. A semi-detached house that has eight windows will cost £3,900 for triple-glazed aluminium windows. For larger homes with 12 windows, expect to fork out around £6,000 for the entire job.

Under Part L of the Building Regulations in England, replacement windows must achieve a Window Energy Rating of band B or better, or a U-value of 1.4 W/m²K to reduce carbon emissions. Triple-glazed windows are 40% more thermally efficient than “A” rated double-glazing aluminium windows.

Triple-glazed windows can also help you save money on energy bills and make your home more comfortable. It improves security, reduces condensation, and makes a house warmer in winter.

Are coloured aluminium windows more expensive?

To upgrade from standard white aluminium, you’ll typically pay about 10-15% extra. The aluminium is powder coated with one of the colours from the RAL colour chart, providing plenty of options.

Anthracite Grey (RAL 7016) is one of the most popular colours for aluminium windows in the UK. It’s classy and goes with pretty much everything. Most often, grey aluminium windows cost less than other colours.

If you are a bit more adventurous, you can always go for shades such as Melon Yellow, Pigeon Blue, or Luminous Bright Red.

How much does an aluminium bay window cost?

Bay windows are a popular choice for many homeowners, with their large panels that make it appear that you have more space. Smooth aluminium materials can help you comfortably uplift both old and new homes.

Aluminium bay window frames are crafted with slim sightlines, ensuring that aluminium frame windows give you a panoramic view of the outdoors while adding more glass area and natural light. These slimline aluminium windows make an ideal space for reading in natural light or a comfortable seating area.

These windows are available with either double glazing or comfort glass. Bay windows come in a host of styles (boxed bay windows, free-standing, integral, bow windows, circle bay windows) and prices. Depending on the frame material and glazing material, you can pay from £2,000 to £8,000 for a new bay window.

How much are aluminium casement windows?

Casement aluminium window costs vary by size and specification, and aluminium flush casement windows are another style option with different pricing. They come in a variety of designs, so you'll want to consider aesthetic preference and other factors like cost, ventilation, thermal efficiency and security when making your selection.

Here are rough estimates for the average cost of multiple aluminium casement windows.

• 600 x 900 (mm): £540 – £680

• 900 x 1200 (mm): £650 – £800

• Larger formats: £770 – £960

What Is Included in the Price of Aluminium Windows?

Usually, the price of aluminium windows will include:

• A comprehensive technical assessment

• Style, size and powder-coated aluminium windows

• Energy efficiency rating (whether A, B or C WER.)

• Specified security features

• Choice of glass (standard, toughened, double-glazed, etc.)

• Type of handles

• Window installation, including trims, fixings, silicones and sealants.

It is important to double-check these details to avoid the spectre of hidden costs and other unpleasant surprises.

How Can You Keep the Cost of Aluminium Windows Down?

Get at least three quotes, compare local and national installers, ask about bulk or seasonal discounts, choose standard sizes and popular colours such as white or anthracite grey where possible, and negotiate on the final price.

We know you want to enhance your home without spending a fortune, right? Here are three ways that can help to keep costs down when you go aluminium window shopping.

Always get quotes from at least three different aluminium window manufacturers, suppliers, or installers. Comparison shopping is a great way to get the best deal on new windows with aluminium frames. Consider both national and local installers; you might become aware of pricing or discounts that you didn’t know about. Some installers may even offer bulk discounts.

Finally: bargain, and bargain big! Haggling is also a great way to keep your aluminium windows costs low. Don’t shy away from negotiating a better price to secure a lower price.

Should You Use a Local or National Installer?

Comparing local and national installers increases your chances of securing highly competitive prices. Both national and local installers offer different and unique features and benefits.

If you opt for a locally based installer, you may get more of a personalised service. However, if you go with a national installer, the company may be in a position to pass on bulk or seasonal deals that will help you get better prices on aluminium windows.

In a highly competitive market, you should compare aluminium windows prices before you buy anything. Aluminium windows are becoming increasingly popular with homeowners who want an upgrade. Their appeal, performance, and durability make them the perfect home enhancement.

Are Aluminium Windows Worth the Extra Cost?

For most homeowners, yes. Aluminium windows cost more than uPVC upfront, but they typically last 30–40 years, need very little maintenance, won't warp or corrode, are 100% recyclable and have slim frames that let in more light. See how they compare in are aluminium windows better than uPVC? and are timber windows cheaper than aluminium?

Windows with aluminium frames have become increasingly popular with homeowners, who appreciate their stylish appearance. In addition to its undoubted aesthetic appeal, aluminium windows offer a range of benefits that can enhance and add value to your home while still providing the security features and insulation properties you need.

Aluminium is a lightweight, versatile and durable metal. It doesn't warp, corrode or flex. high quality aluminium windows last a long time (up to 30-40 years), require very little maintenance, and are 100% recyclable. Aluminium windows are a great choice for keeping homes warm in the winter and cool in the summer, which can also help reduce energy costs. And they come in a range of colours to suit every taste and style.

Aluminium windows feature thermal breaks – a barrier between the inner and outer sections of the aluminium frame. The barrier has a lower conductivity than the metal it surrounds, which helps keep heat in and cold out.

Aluminium windows are low maintenance. Here are some tips on sealing aluminium doors and windows and cleaning mould off aluminium window frames.

If you're replacing doors at the same time, our aluminium bifold doors and aluminium sliding doors can be powder coated in the same RAL colour as your new windows.

Aluminium Window Cost FAQs

Why should you compare aluminium windows prices?

When you compare aluminium windows prices, it will help you get a better deal that meets both your requirements and your budget. Along with this, researching prices can give you peace of mind when making a decision.

This will allow you to check out what different companies can offer you in terms of aluminium windows prices. This includes bulk deals and special offers through certain window styles or accessories.

What is the lifespan of aluminium windows?  

Do you want to know how long do aluminium windows last?

Aluminium windows are naturally corrosion-resistant, with an impressive lifespan of 30 years or more. With periodic cleaning and perhaps some oiling of the window hardware, aluminium window frames require little maintenance.

Can triple glazing help reduce energy bills?

If your home has single- or double-glazed windows, you can save up to 50% on energy bills in a year. If you have a detached house with single-glazed windows, replacing them with triple glazing could net you around £175 worth of savings.

What are U-values?

A U-value measures how effective a window or door is at keeping heat inside your home. The lower the U-value, the more energy efficient your aluminium windows or doors are.

Are aluminium windows better than uPVC windows?

Aluminium is a metal and is stronger. Also, a high-quality aluminium window can last longer than a uPVC frame. A uPVC degrades with time and is prone to regular expanding and contracting, which can make the window frame stiffen with time.

Are aluminium windows more expensive than uPVC?

Yes. Aluminium windows usually cost more than uPVC windows of the same size, because the material and thermally broken frames cost more to manufacture. However, aluminium lasts longer, keeps its colour and needs less maintenance, so the cost per year of use is much closer than the upfront price suggests.

How much do aluminium windows cost per m²?

Many suppliers quote aluminium windows per square metre. Triple glazed aluminium windows average around £500 per m² in the UK. Smaller windows tend to cost more per m² than large ones because the frame, hardware and installation make up a bigger share of the price.

Do aluminium windows add value to a house?

Good-quality aluminium windows can make a home more attractive to buyers thanks to their slim modern look, energy efficiency and long lifespan. They also pair well with aluminium bifold doors for a consistent finish across the back of the house.