Fancy the strength and industrial look of steel windows, but not sure what you'll pay? Steel windows will vary in cost, depending on the style and size you choose.

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Steel Crittall-style windows are popular with homeowners because they're versatile, low-maintenance and secure, and they make a striking impression on properties new and old.

They're an investment, so it helps to know exactly what drives the price before you get quotes. Here's the full breakdown of how much steel windows cost, so you can work out whether they're worth it for your home.

What do steel windows cost?

Average steel window costs range from £1,200 to £2,500, depending on the style of window you go for.

The total cost of your steel windows will vary based on several factors, which we cover below.

Factors affecting your steel window price

Several variables affect what you'll pay for steel windows. Here are the main ones to weigh up.

Material

Not all steel windows are made completely of steel. Lots of “steel windows” have a timber core coated in steel, and you can also get “steel-look” windows made of other materials entirely, often aluminium.

Aluminium windows cost significantly less than steel windows, although they don't come with all the same benefits.

Style of window

The style of window you choose also affects your overall price. The most cost-effective steel windows are usually casement windows, which tend to range from £1,000 - £1,400. At the other end of the scale, a steel bay window costs between £2,000 - £3,000.

For a dedicated breakdown of tilt and turn window prices, see our separate guide.

Size of your windows

Larger steel windows need more materials, so they cost more. They're also likely to be heavier, which can push up your window fitting costs.

If you're replacing existing windows, size probably isn't something you can control. If you're fitting windows to a new opening, it's worth thinking about.

Window design

Your window's design affects price in a few ways. The more opening elements a window has, the higher the manufacturing cost.

The glazing bars that give steel windows their industrial look also vary in size, with thicker bars usually costing more. Some windows have these bars applied on installation, while others need factory glazing, which can add to your overall cost.

Colour

Most steel windows are black, but you can get them in pretty much any colour. Black steel windows tend to cost the least; non-standard colours can push your costs up a little.

Extras

Finishing touches affect your total price more than you might think.

For steel windows, you can choose from a range of specs and finishes on things like window handles, hinges and peg-stays. Depending on your project, you may also need extra work, such as:

• Replacing the window sill: typically £140 to £220 per sill

• Adding extension pieces to your windows

• Extra profiles for bay and bow windows

• Curved heads above windows

Glass

You'll also need to choose your glass. Most new steel windows now come double-glazed as standard, but there are plenty of upgrades available.

You could opt for higher security glass, acoustic glass, higher insulation or solar control glazing. Any of these upgrades will add to your total steel window price.

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How long does it take to fit steel windows?

Fitting steel windows usually takes a specialist installer one to two days per window, depending on size and whether you're replacing an existing frame or fitting a new opening.

Bay and bespoke shapes take longer because of the extra profiles and glazing involved.

Are steel windows worth the cost?

For most homeowners, yes: steel windows cost more upfront than uPVC or aluminium, but their strength, security and slim sightlines make them worth it if you want a genuine industrial look that lasts for decades.

There are a few downsides to weigh up too. Here are the pros and cons of steel windows.

Pros

• Strong

• Secure

• Long-lasting

• Low-maintenance

• Excellent insulator

• Often made bespoke

• Can be made from recycled materials

Cons

• Heavy: you may notice this when opening and closing your steel windows

• More expensive than other window types

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Aluminium vs steel window costs

Yes: steel windows generally cost more than aluminium, but aluminium can't fully match the slim profiles and authentic industrial look that genuine steel windows give you.

Aluminium windows are often the first port of call for homeowners who want the look of steel windows without the price tag. The average cost of an aluminium window in the UK is in the region of £475. That's still more than many other window materials, but aluminium windows cost significantly less than steel ones.

So what's the catch? Here's a brief lowdown on how aluminium compares.

For cheaper alternatives to the industrial look, see our dedicated guide.

Pros

• Costs less

• Won't rust

• Doesn't require a specialist company for installation

• More widely available

Cons

• Weaker than steel

• Not as slim

• Won't last as long

• Tricky to create curved heads

• Not the real deal

Both materials are solid options, giving homeowners security, longevity and an attractive look. But aluminium Crittall-style windows won't have the authentic look of genuine steel windows.

If you want your windows to look like the real thing rather than a replica, genuine steel windows will be worth the extra cost.

You can find checked and reviewed window fitters near you on Checkatrade. Alternatively why not check our advice about steel windows or look at other types of window for your home.

Should you fit steel windows yourself?

Fitting steel windows yourself isn't recommended. They're heavy, often bespoke to the opening, and getting the seal and fit wrong can mean draughts, leaks or building regs issues.

A specialist steel window fitter will measure, order and install correctly, and most offer a guarantee on the work.

Every Checkatrade job is backed by our £1,000 guarantee

Up to £1000. Eligibility criteria and T&C’s apply.

Steel windows cost checklist

Steel windows cost checklist

Before contacting a tradesperson, here's what to check:

• Get measurements taken by a specialist fitter before ordering: steel windows are rarely off-the-shelf

• Confirm whether your windows need to match a conservation area or listed building requirement

• Decide on glazing upgrades (acoustic, solar control, higher security) before your fitter orders the frames

• Check whether your chosen colour is standard (usually black) or a non-standard finish that adds to the cost

• Ask whether the quote includes making good around the frame and any sill replacement

• Confirm the fitter's guarantee covers both the frame and the installation

How to find a checked window fitter

Finding a window fitter near me is straightforward with Checkatrade. Every tradesperson on our site is checked before they join, and their work is reviewed by real customers.

To get quotes for your steel windows, post your job at checkatrade.com/post-a-job. To help your fitter give you an accurate price, have the following ready before they visit:

• How many windows you need fitting

• The approximate size of each window opening

• Your preferred style: casement, sash, tilt and turn or bay

• Whether you want a standard black finish or a different colour

• Your target timeframe for the work

Key takeaways

• Average steel window costs range from £1,200–£2,500

• Your overall cost depends on factors like the size, style and design of your windows

• Homeowners on a budget can achieve a similar look with aluminium windows

• Steel windows are often made bespoke, giving you endless flexibility

Steel windows cost FAQs

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