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:-

Sash Windows Balham, Sash Windows Barnes, Sash Windows Chelsea, Sash Windows Clapham, Sash Windows Earlsfield, Sash Windows Fulham, Sash Windows London, Sash Windows North London, Sash Windows South London, Sash Windows East London, Sash Windows West London, Sash Windows Pimlico, Sash Windows Hammersmith, Sash Windows Kensington, Sash Windows Wandsworth, Sash Windows Wimbledon

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 Service Earlsfield South West London

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.

Sash Window Replacement Earlsfield South West London

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.

Draft Proofing Sash Windows London

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 journey started back in 1999 for Mark. as a 16 year old apprentice in Pocklington, North Yorkshire, where he learnt his craft as a bench joiner creating all types work from conservatories to staircases.
From there he went from strength to strength starting his own business in a workshop in York in 2004 where he made all things wood! his favorite thing to make was windows hence the new venture….
In July 2019 Mark made a big decision in his life and made the move to the big smoke, he’s new to the area but with 21 years experience under his belt producing nothing but high quality work he’s definitely got a lot to offer!!

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.

Banner image - FAQs

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.

Sash Windows London

Henry Moreton-Stade Developments Ltd
I’ve worked with Mark for 14 years on and off. He project manages all the shop fitting on my leisure sites across the country, I wouldn’t use anyone else and can’t recommend him enough. His attention to detail is second to none.
Simon Smith-Murton, York
Mark manufactured and installed the windows in my farm house. They had to be changed like for like as we live in a conservation area, when the windows arrived at our house I was amazed how every little profile matched the ones we were taking out. Definitely would recommend.

At LDN sash window co, The founder of the company has been in the joinery business a long time, he knows the pros and cons of all things wood! For this reason we made the decision not to use softwood on any of our external projects. We want our work to look great, be an asset to your home, and more importantly to last the length of time! We know this cannot be achieved using run of the mill pine externally. We’ve a wide range of hardwoods to choose from which we use to suit your individual properties needs to bring out the very best in the job at hand.


Upgrade your existing sash windows with double glazing!!

We will go to extreme lengths save the authentic style of timber windows while raising their level of energy efficiency. By inserting the new, slim, double glazed hardwood sashes into the existing frame, we call this “the retrofit system” Ldn sash window co reduce the disruption as well as need for redecoration and thus the total project cost.

By simply replacing your original, single glazed sash with a bespoke, replica hardwood sash we can reduce the overall mess produced by the project substantially. We pride ourselves on offering double glazed hardwood sash windows that are so genuine in look they are often mistaken for the original window. You can be sure that your home will retain its original charm and character. 

Our fabulous double glazed hardwood windows will significantly reduce draught and sound concerns, make their maintenance easier and offer effective heat retention. Double glazing your windows with us can  absolutely improve your home’s security. Upgrading and double glazing your windows is a sure way to improve your energy costs.

Reduced energy bills, increased efficiency and easy long-term maintenance, are a few of the important bonuses that upgrading your windows with us will bring, we manufacture and install custom-made slim, double-glazed sashes that comply with part L of the building regulations our units come argon gas filled as standard. 

We understand that traditional types of sash windows have the glass fitted on the outside and rebated within, resulting in them being difficult to modify to double glazed units. We comprehend that current building regulations signify that it will be virtually unthinkable for new properties to contain single glazed windows.

Whether you live in a traditional listed building or a new, modern city in the centre of London, our sash windows have bespoke double glazed sashes that will meet your preference. Enjoy the benefits of double glazing in your home the whole year through, with warmer winters and cooler summers, our windows have many functions.