Sash Windows from The LDN Sash Window Company
Replacement sash windows, sash window refurbishment and full replacement windows and doors. We are a local bespoke sash window company in South West London, covering all the surrounding areas inc:-
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As a lot of areas in the London boroughs are conservation areas we specialize in bringing your old sash windows back to life! albeit a replacement pane of glass, a replacement sash to a complete new sash window! The options are endless!
LDN sash window co are a London based company!
At LDN sash window co we pride ourselves on being local. All our products are made in the UK, unlike a lot of other companies who import their products from overseas to try and save money so they can maximise their profit, we certainly don’t do this, we feel it would result in huge lead times and no room for error!
All our hardwood sash windows are made locally to the highest quality, we only use good quality solid hardware too, our work really does speak for itself. We keep our overheads low which reflects in our prices, with that in mind and our extremely talented fitters doing the installation work, we guarantee a great job and offer a 10 year insurance backed guarantee on all our fitted products.
Here are some of the sash window services that we have to offer……
Installation of complete new sash windows
Our Sash window range boasts both charm and character. For this reason, more and more homeowners across the London are inquiring about this option, Although we do like to consider ourselves as conservationists, sometimes it’s not an option. We only supply quality hardwood sash windows. The windows we supply are appropriate not only for period properties but also new builds where the sash windows are required to meet thermal, acoustic and security standards. Designed with all the traditional detailing and carefully selected decorative features such as glazing, bars, mouldings and architectural hardware. We offer a wide variety of options to suit all our customers needs and desires. Available in both spiral balance or cords & weights options. We also offer traditional casement replacement windows, arched and curved work, leaded lights…. the options are endless!
Cords & Weights
The Sliding Sash Cords & Weights window is a vertical sliding sash, incorporating a traditional pulleys and weights lifting system. This option is particularly suited to the conservation and refurbishment properties.
Casement windows
Casement windows traditionally open outwards on hinges, we’ve many hinge options to offer from standard butt hinge to ball bearing or projection hinges. There’s a few options we can offer to you depending on which best suits your home.
We are a FENSA registered company, all our windows come with a 10 year insurance backed guarantee.

Full sash window replacement
We can provide a complete replacement sash window service. If we feel a sash window is beyond the state of repair (our last option!) but if the situation does occur this is always available for both double of single glazed options to remain “in keeping” with the property.

Double Glazing Upgrading
We offer a unique service where a lot of people would love to upgrade their windows to double glazing but cannot for conservation reasons, We have a system where you keep your original frames and we insert new sashes in them keeping the section sizes the same with double glazing installed. It’s a way to keep your original aesthetics and benefit from double glazing and draught proofing. We call this a “retro fit”. we usually recommend a reasonably priced hardwood sash to replace the common softwood sash as with experience we find softwood sashes deteriorate rapidly compared to hardwood.

Draught proofing sash windows
Draught proofing your sash windows is a great way to stop the common “whistling window” when its rattling in the wind and letting cold air into your property. We don’t use the reasoning that your initial investment would be returned in saving on your heating bills as the numbers just simply don’t add up! However, if you want a warm cosy home with reduced bills then this is a great option to think about. We can guarantee draft proofing sash and casement windows and doors up to 95% from its original state so it really is worth while.
We’re a passionate sash window business with exceptional attention to detail
The beauty of LDN SASH WINDOWS CO is that we are a local London business, we keep our overheads low and this is reflected in our price. In fact, the person you meet for an initial measure up will be the person overseeing and carrying out the work. So for a free no obligation quote please get in touch.
For a free no obligation meeting please get in touch.

Q. What are the main benefits for upgrading to double glazing?
A. It usually keeps the house warmer / offers an extra sound barrier.
Q. What can stop rattling windows/draft?
A. Using pre-inserted brush stripped beading holds the sashes in place and reduces air inlets.
Q. What is “low E glass” and argon filled?
A. Low emissivity glass keeps the heat in and deflects the cold reduces it coming into your property its got a deflective film on one pane of a double glazed unit, argon gas filled unit creates a better thermal barrier of up to 10% and it doesnt cost much more.
Q. Can you match the existing style/mould of my window?
A. Yes we can make a template and match anything
Q. What is your current lead time on work?
A. Replacement windows / new work is about 6 weeks from order, refurbishment can be sooner depending on the nature of the job.
Q. Can I have extra locks on my windows?
A. Yes I use a range of extra security locks if needed. I recommend ERA locks as they give the best manufacturers guarantee.
Q. What type of wood do you usually use?
A. We use timbers that are fsc certified, we usually recommend a range of hardwoods.
Q. Do you offer a small repairs window service?
A. Yes we offer a re-cord re beading service to get your window operational.

EXCELLENT
Based on 54 reviews
Posted on Google![]()
Phil PykeTrustindex verifies that the original source of the review is Google.
Excellent service from start to finish, quality of the windows is spot on and the total service is seamless from prepping to tidy upPosted on Google![]()
Katie SmithTrustindex verifies that the original source of the review is Google.
If you need new double glazed sash windows, I would highly recommend using LND Sash Window Company. Mark was friendly and professional throughout the process, demonstrating care and knowledge. His installers were equally as impressive, especially getting the frames up the stairs of my flat, and they left my property in a spotless condition. Thanks to the team!Posted on Google![]()
Caroline Harding-EdgarTrustindex verifies that the original source of the review is Google.
We used the LDN Sash Window Company to remove a sash window to get a sofa out, and then to replace it a few hours later. Mark was really flexible, happy to work around the collection drivers' timings and did a great job. Wouldn't hesitate to recommend.Posted on Google![]()
Libbie NortonTrustindex verifies that the original source of the review is Google.
Mark and the team have been brilliant. Amazing service and such beautiful windows! Would 100% recommend, we are very happy 😊Posted on Google![]()
LorneTrustindex verifies that the original source of the review is Google.
From the initial visit to the completion of the work, I experienced an excellent service from start to finish. LDN Sash Window Company ensure that the work is carried out to a high quality and any queries are answered along the way.Posted on Google![]()
NickTrustindex verifies that the original source of the review is Google.
When I was looking for a sash window company, I contacted around 10 businesses. I chose Mark as he was down to earth, knowledgeable and offered competitive pricing. I had the sash windows for my bay window retrofitted and I am very pleased with the result. I am happy to recommend LDN Sash Window Company.Posted on Google![]()
MargaretTrustindex verifies that the original source of the review is Google.
I am extremely pleased with my new double glazed windows. From the first visit to quote for the work to the final product and installation I was impressed with this company. The price was right, they had worked in this conservation area many times and knew the planning requirements and I checked out their work on a neighbouring house. The fitter had a pleasant manner, did a great job and left my sitting room in a spotless condition. The price included painting the exterior sills and surrounds and also the brass window locks and accessories. A good experience all round.Posted on Google![]()
Jane LeedsTrustindex verifies that the original source of the review is Google.
Excellent service from start to finishPosted on Google![]()
Laura WilliamsTrustindex verifies that the original source of the review is Google.
LDN sash windows repaired most of our timber sash windows (and replaced one) last summer and the work was fantastic and has lasted really well. They were the only company we got a quote from that didn’t try and push us to replace all the windows and carried out a range of different repairs as required instead. The workmanship was really great and they seemed to all care about the quality of their work. Highly recommend.Posted on Google![]()
tim mccoyTrustindex verifies that the original source of the review is Google.
Easy to deal with and highly recommended by neighbours, I was very pleased with the high standard of Mark’s work which I thought was reasonably priced. I would use him again.Verified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more
