About Us


We understand that you are about to make one of the most important decisions with regards to the appearance and security of your home. Therefore you require a double glazing company that you can trust.



We are a family owned and run business, set up by Steven and Jacqueline Lancaster, a husband and wife team, who have many years experience in this industry. Academically we are both legally trained and have also worked within the legal system, therefore we are able to advise and assist you with regards to any planning laws, conservation issues, technicalities surrounding listed buildings etc. We can help with these issues as part of our service and try to make it as hassle free process as possible.


At South Lakes Windows Ltd we pride ourselves on the quality of our product and service. Like you, we shopped around to find the best product for our clientele, but not at an unrealistic price. It has taken some time and finally we have found a product of top class quality and design that your property deserves. Our double glazed windows, UPVC and composite doors, conservatories and orangeries speak for themselves, we fell in love with our products the first time we saw them and we are sure you will too.


South Lakes Windows Ltd are proud to be certified as a Which? Trusted Trader.


You are guaranteed a bespoke design, unrivaled service and flawless finish. It is also a high priority of ours that our after sales service is as good as the installation. You are not just a number, you will be remembered and can take satisfaction in knowing that you helped us to build our business.

Because of our market leading double glazed products, we have ensured that we have a superior installation service to match. We believe that our installation service is one of the best in the industry. Our experienced fitters and staff are proud to work for South Lakes Windows Ltd and their pride is carried through to the installation they provide for you.

Thank you so much! @bygonesashwindows hope you all have a lovely Christmas and Happy New Year xx🥂
Thank you @signsexpress Lancaster for the livery on our Service van #newteammember  #signage great service as always.
Happy Anniversary to us, 13 years in the making #southlakeswindowsltd #whenqualitymatters
Just taking delivery of these absolutely  stunning vertical sliding sash windows from @bygonesashwindows 😍
Installation in The Lake District in Agate Grey
🎉🎈Happy Anniversary to us!! 12 years of continuous trading. 🎈🎉We would like to thank our wonderful customers for their ongoing support and loyalty, our fantastic suppliers who we have developed long-standing relationship with since we opened our doors and of course our amazing staff members who have played a fundamental role in our success story. 🥂to many more. #happybirthday #whenqualitymatters #southlakeswindows #windows #doors #conservatory #extensions
Christmas treats from Masterframe Windows #Bygonesash #Masterinstallers #MerryChristmas
Suffolk Lavenham residential uPVC door with deep midrail in French Grey #entrancedoors #suffolk #doorsofinstagram #toplight #design