SCI Windows & Doors

Since the 1970s, SCI has been trusted by homeowners across Surrey and South West London for high-quality, made-to-measure windows and doors. We’re proud to combine expert craftsmanship, great value, and friendly, reliable service. With years of experience, we understand the unique character of local homes, as well as planning rules and Conservation Area guidelines. Pop into our Morden showroom to meet the team, explore our product range, and get expert advice tailored to your home. We’re here to help you make confident, informed choices—and bring your home improvement ideas to life, beautifully and stress-free.

Choosing your windows and doors from us is easy…

Why do you want a new door or windows? What is the most affordable way to insulate your home? How can you restore the original appearance of your home? How can you add some contemporary style to your home?

There are so many options out there, and SCI has the knowledge and experience gained from nearly 40 years in this profession. We’re proud to have over 10,000 satisfied customers throughout South London and Surrey.

Call or Email us today for a friendly chat; we’re sure we can help answer your questions and queries.

  • 10 Year Guarantee

    All Windows and Doors fitted by SCI are under a 10-year insurance backed guarantee.

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  • Energy Efficiency

    SCI A-rated double glazing can help reduce your carbon footprint and energy bills. We also offer triple glazing for even greater efficiency.

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  • UK Manufactured

    All of our windows and doors are developed, designed and manufactured for the demanding climate of the UK, here in the UK.

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  • Reviews

    Read our exceptional Checkatrade Reviews. We pride ourselves on having an average score of 9.8 and always strive to provide the best service possible.

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Outstanding Quality

SCI Windows designs, supplies and installs the highest rated UK manufactured windows and doors to our customers throughout South West London, Surrey and beyond.

PVCu & aluminium are both 100% recyclable materials & create energy efficient windows that exceeds all current regulations.

Our reputation precedes us, earning us valuable customer referrals as well as consistent high quality leads. Between us we have many years of experience, which enables us to supply you with exactly the products you are looking for.

Stylish and Contemporary

With a real passion for design as well as engineering, the windows and doors that we install are at the forefront of energy efficiency, acoustic insulation, aesthetics and architectural empathy.

We will listen to what you are looking for and give you options, based on the many styles and designs we work with.

We are also proud to offer a 10 year guarantee to all customers.

Latest Reviews

  • Excellent service would highly recommend! We had a few companies quote us for the replacement of 2 bay windows ranging from £9,500 to £13,000. SCI were the only company who really looked at what we needed and concluded that a simple repair and renew job was all that was needed, saving us thousands. Putting the customers needs first rather than making a profit. They also replaced a small bespoke window and did an excellent job. Chris was polite, friendly and left no mess. We will definitely use SCI Products again.

    Window fitting and repairs – Checkatrade Review

  • Jamie and his young assistant arrived on time and set to work putting down floor protection. He explained exactly what would happen and that another team would be assisting the following day to do the larger bay window. The windows were fitted to the upmost professional standards taking the old windows with them. The next day two other guys turned to join them and replaced the main bay window which they did using a support pole to make sure there would be no load bearing problems. I highly recommend this company for their friendly and professional service. They even hoovered up afterwards!

    New double glazed windows – Checkatrade Review

All Reviews

Recent Installations

Please feel free to get in touch if you have any questions…

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About SCI Windows

SCI has been a trusted name since the 1970s, moving to our Morden showroom in 1981 and thriving under the same dedicated management team since 1987. Our ethos is simple: providing exceptional customer service, honest advice, and top-quality, UK-manufactured products. We take pride in building lasting relationships with our customers, ensuring they feel confident and supported every step of the way. With decades of experience and a commitment to excellence, we’re here to help you make the best choices for your home. Come visit us; we’d love to share our expertise and passion with you!

Average Score 9.83 Scored based on 1036 reviews