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As the most popular window style in the UK, our casement windows can offer plenty of natural light across South London, Surrey, and Kent. Start a free quote with Osborn’s today.

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Family business, established in 1966
Free, no-obligation survey and quote
Showroom in South Norwood, covering South London and Surrey

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Casement window fitted to a South London property

What is a Casement Window?

A casement window is hinged at the side of the frame, with an additional hinge sometimes attached to the top or bottom of the window. This allows for the window to be fully opened; often using a handle in the middle of the window frame. Because of their simple yet effective design, casement windows can be configured in any layout that your property requires. They’re often paired up with each window opening outward in different directions, but single casement windows work just as well for smaller rooms.

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Osborn Glass casement window installers in South London

Casement Windows

As the most popular window style in the UK, our casement windows can offer plenty of natural light across South London, Surrey, and Kent. Start a free quote with Osborn’s today.

Get a free quote

Frequently asked questions

What is a casement window?

A casement window is hinged at the side of the frame and opens outward, usually operated by a handle in the centre of the frame. It’s the most common window style in the UK, and for good reason.

The full-opening sash gives excellent ventilation and makes cleaning the outer pane straightforward from inside your home. They can also be arranged in almost any configuration, from a single narrow window in a bathroom to wide paired units across a living room or bedroom.

What materials do casement windows come in?

We supply casement windows in uPVC, aluminium, and timber. uPVC is the most popular choice because it is thermally efficient, low-maintenance, and available in a wide range of colours and woodgrain finishes.

Aluminium offers slimmer sightlines and suits modern extensions particularly well. Timber remains the preferred option for period and listed properties, and may be required in conservation areas. If you’re not sure which is right for your home, we’re happy to advise during your free survey.

Are casement windows suitable for conservation areas?

Yes. We offer heritage-style casement options that have been approved by local authorities in conservation areas across South London and the surrounding areas.

These windows replicate the look of traditional timber frames while meeting current building regulations, so you don’t have to compromise on either character or compliance. If your property is listed or sits within a conservation area, just let us know when you get in touch and we’ll give you some suitable advice on what’s been agreed.

What guarantee comes with a new casement window installation?

All our casement window installations are backed by a 10-year insurance-backed guarantee that covers both the product and the installation.

We’re also CERTASS-registered, which means your new windows are fully compliant with building regulations. You’ll receive a certificate when it’s completed, which is useful to have on record and straightforward to pass on if you ever sell your home.

How do I get a quote for casement windows?

What our customers say

      EXCELLENT  
   Based on 68 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Joshua Raymond 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great experience with Osborn Glass, who I have used for many years.  The windows look fantastic, and the installers were quick, courteous and incredibly neat and tidy.
  
 
      Posted on Google  
   
   Steph Still 
 
 
 
 Trustindex verifies that the original source of the review is Google. I can't recommend this company enough. They are absolutely brilliant. We had a crack in our mirrored splashback and was original told by another company that it would be a really complicated and expensive job. Found Osborn glass and they quoted 4 times less and got the job done in less than an hour! Really great communciation and would highly recommend.
  
 
      Posted on Google  
   
   Riverside Group 
 
 
 
 Trustindex verifies that the original source of the review is Google. Osborn fitted our new front door a couple of years ago and we've been really pleased with it. But what's been even more impressive is their after sales service. Nick, the installation manager, has been brilliant with following up a minor teething problem we had and with other matters. We've recommended Osborn to friends and they've also had a similar experience to us. This is a company that in our experience does not just take the money and then leave you - they follow up and provide great customer service.
  
 
      Posted on Google  
   
   Dee Ellis 
 
 
 
 Trustindex verifies that the original source of the review is Google. Glass was cut to size on the spot. I was also given samples to view with prices of different glass available.
  
 
      Posted on Google  
   
   Kathryn Hughes 
 
 
 
 Trustindex verifies that the original source of the review is Google. So glad I chose Osborn Glass.  From the first communication they were knowledgeable, helpful, good humoured and offered good value.  Will definitely use them again.  Highly recommended.
  
 
      Posted on Google  
   
   Rhona Livesey 
 
 
 
 Trustindex verifies that the original source of the review is Google. I was recommended to Osborne Glass by a friend and I was delighted with them .  Importantly I am thrilled with the quality of their work which has transformed my kitchen.  What set them apart though was the fantastic service from Tony and his team .  As well as doing a superb job they were all just so great to deal with . They would be my first choice on similar projects in the future .
  
 
      Posted on Google  
   
   Sara Negro 
 
 
 
 Trustindex verifies that the original source of the review is Google. I can't recommend this company enough! I had a complex mirror repair on a wardrobe door that was chipped, and I was really worried about it. The mirror had a triangle shape with diagonal edges, and I needed it to perfectly match the other mirrors on the door. I had reached out to other companies, but most told me the job was either impossible or would cost more than the wardrobe itself.

Tony, the manager, was incredibly helpful on the phone, reassuring me that they could do the job and match the existing mirrors perfectly. He was very responsive to emails, and I really appreciated his attention to detail. The service was top-notch from start to finish. The guys who collected and delivered the door were not only professional but also super nice and kind. They even helped me mount the door back onto the wardrobe, which was a lovely touch.

The repair was flawless, and the new mirror matches the original ones perfectly. The whole experience was seamless, and I’m beyond happy with the result. The price was very reasonable for the high-quality work provided. If you need mirror repairs, these are the guys to go to! Professional, reliable, and truly skilled. Thank you, Tony and team!
  
 
      Posted on Google  
   
   Marian Heap 
 
 
 
 Trustindex verifies that the original source of the review is Google. Just wanted to shout out to Steve and Nick at Osborn Glass who sorted out our backdoor issues this week - six years after installation - professionally and efficiently. Fantastic service, thank you!
  
 
      Posted on Google  
   
   Kenzo 
 
 
 
 Trustindex verifies that the original source of the review is Google. Unreliable -they failed to show up as arranged and have not been responsive to emails. Communication is poor.

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