SGS Windows
Your Local Area, Your Local Area
Checkatrade member since September 2024
Accepts Checkatrade Pay
We guarantee the work for up to £1,000 for 12 months. T&Cs apply
Services
- Bay Windows Installation
- Bifold Doors Installation
- Composite Front Doors Installation
- Doors Supply
- Exterior Doors Installation
- French Doors Installation
- Patio Doors Installation
- Stable Doors
- Triple Glazing Installation
- UPVC Doors Installation
- UPVC Windows Installation
- Window Fitters
- Windows Supply
- Windows and Doors
- Aluminium Doors Installation
- Aluminium Windows Installation
- Bifold Doors Repair
- Double Glazing Installation
- Glass Replacement
Customer Reviews
Write a review9.79 /10
Based on 42 reviews over the past 12 months
Quality of work
9.88
Reliability
9.74
Communication
9.76
What customers are saying
AI-generated from customer reviews over last 24 months
Customers consistently praise this trade for their professionalism, high-quality workmanship, and excellent communication from start to finish. They are also frequently commended for being friendly, tidy, and offering reasonable prices.
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Reviews (76)
10 Full house windows and doors
Posted 23 January
Recently had 17 windows 2 doors and 1 french door fitted. We are extremely pleased with the work from Alan and the fitters as they were professional and extremely helpful throughout the whole experience. They had the whole house replaced within a few days and they left it spotless. We wouldn’t hesitate to recommend them to anyone!Verified reviewerJob location: TS26- MMohammed Y
10 UPVC doors fitted to a high standard
Posted 19 January
I recently had a new UPVC doors fitted, and I couldn’t be happier with the service. SGS was professional, punctual, and extremely knowledgeable. The installation was smooth, and they paid great attention to detail, making sure everything was fitted perfectly. I would highly recommend SGS to anyone looking for reliable and skilled UPVC door fitting – excellent work from start to finish!Verified reviewerJob location: TS1 9.67 New Front Door with side panels
Posted 19 December 2025
Job location: HA8Alan at SGS was friendly, informative and was easy to do business with, and was good value for the quality of services provided. I would happily recommend SGS to anyone.- MMichael G
9 new PVC windows installed
Posted 26 November 2025
Alan at SGS Windows has efficiently and very professionally installed 3 french doors and an unusual opening round window in my flat. He was meticulous in measuring and ensuing that I got the style and type of doors I was after. He offered good advice and he keenly priced the job. He took just two days to install the windows, working hard and tidying up as he went along. His colleagues were polite and professional and hard working. I would recommend SGS Windows.Verified reviewerJob location: SE16 10 Pleased with the quality of work carried out
Posted 11 November 2025
My elderly mum recently had a front door fitted and is over the moon with the quality of work carried out. The team were friendly, and supportive of her needs. She said they tidied up after themselves, explained the process clearly and carried the work out to a high standard. The front door itself looks lovely and the price paid was very reasonable. We would definitely recommend.Verified reviewerJob location: TS23- CChristian M
10 Window replace
Posted 24 October 2025
Job location: SW11Window replacement was done well
Photos
Company Info
Owner
Mr Alan Slasor
Sole Trader
2 years on Checkatrade
VAT Registered
Yes: GB493218183
SGS Windows is a trusted local specialist in uPVC windows, doors, and conservatories, serving Stockton-on-Tees and the surrounding areas. With over a decade of experience and consistently high ratings on Checkatrade, we provide reliable, affordable installations backed by a 10-year warranty. Our products are sourced from Selecta Systems, a leading manufacturer known for energy-efficient and durable designs, ensuring every installation improves both the comfort and security of your home.
Our team of fitters, each with 10–20+ years of hands-on experience, takes pride in delivering neat, professional work with a focus on detail—from secure multi-point locks to perfectly sealed, draught-free finishes. We aim to make the process straightforward and efficient, offering quick surveys, clear communication, and competitive pricing—often beating written quotes. Choose SGS Windows for quality products, skilled workmanship, and dependable service at the right price.
This trade passed up to 12 Checkatrade vetting checks
Member since September 2024
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