At The Old London Window Company we are proud of the reputation we have built over the years, and of the feedback we get from our valued customers who are happy to tell us what they think. Here’s what some of them have said about us.

All our testimonials are genuine.


I had secondary double glazing installed by The Old London Window Company in December 2013 and I must say it was one of the best investments I’ve ever made.  The difference it has made to the house is amazing. It is so much warmer – especially in the hallways after the big window at the top of the house was done. It’s too soon yet to tell but I expect it will also help to reduce my bills.

To tell the truth, I was very reluctant to have secondary double glazing. Not just because of the cost but I was concerned about the aesthetics.  Our house is Victorian and one of the features of these old houses is the original sash windows. I was afraid that double glazing would spoil the appearance and look cheap.  I was also worried about getting access to the windows.  Would it be possible to open them in the summer? Would I be able to get access to clean the windows? Would it be possible to get access when I needed to have repairs done or the windows and ledges repainted?

My son, however, was convinced I should look into this and he took me along to see a friend who had used Old London. So I agreed (somewhat reluctantly) to give them a call. When Darren Deegan came to look, measure up and give me a quote he was able to answer all my questions and to suggest various solutions.

Having made the decision my next concern was the actually installation – how much time would it take? How much mess would there be? To my surprise and delight it was all done in a day by 2 men. And the windows have not changed the appearance of the house from the outside; nor are they obtrusive from inside.

So, if you are thinking about having secondary double glazing my advice would be to study the different possibilities on the website and try to see an actual installation. I would recommend this company for their price and their service.  Given the dreadful weather these past few months having double glazing has made our home so much more comfortable than in the past.


I would like to thank The Old London Window Company for the quick and excellent service while installing the removable secondary glazing for my windows. From assessment, pricing and installation, they made the whole process a lot easier than I expected.

I was impressed by the ease in which they provided service and the quality of workmanship.The secondary glazing is unimposing and did not change the look of my sash windows.

I have found The Old London Windows Company to be very professional and efficient and I will not hesitate to recommend it in the future.


I asked Darren to come round and look at my windows that needed to have secondary glazing windows installed. He gave me a cheaper final quote which was much better than other window companies. After the windows were installed, job well done, the windows are good quality, A rated and I am very pleased with them because I can hardly hear the noise from outside now.  Besides, he is a very honest man, he found a wallet with cash inside outside my building during the work, he used the ID in the wallet contacted the owner and gave it back. Would definitely use again, and definitely recommend.


I requested a secondary glazing installation and I got a competitive price, a fast response, an upgrade of material from the standard equipment and a prompt and precise installation. I can definitely say that I've been extremely satisfied with the service received and the cooperative and pro-business approach.

I would definitely recommend The Old London Window Company to any person I know.


London’s Leading Secondary Glazing Company

Tel: 0208 572 9111



The Old London Window Company

51 Pelham Street, London SW7 2NJ

Tel: 0208 572 9111  Fax: 01932 781600

Email: info@oldlondonwindows.co.uk

The Old London Window Company 2018 all rights reserved.

Company Registered in England and Wales.  Company Number 5085283