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Endorsed by Which?
KJM Windows and Conservatories
Opening Hours
Today - 09:00–14:00
- Monday 09:00–17:00
- Tuesday 09:00–17:00
- Wednesday 09:00–17:00
- Thursday 09:00–17:00
- Friday 09:00–17:00
- Saturday 09:00–14:00
- Sunday - Closed
Organisations and Awards
About
Formed in 1983, KJM Windows & Conservatories is a multiple award-winning glazing company. With over 43 years of experience, we’ve gained the trust of thousands, installing over £100 million of home improvements. We offer a diverse range of PVCu, timber, and aluminium products, all backed by a proven 10-year insurance-backed warranty.
Our commitment to quality is reflected in our accreditations. We are proud members of the Glass & Glazing Federation, FENSA, Checkatrade, and 'Buy With Confidence' (Trading Standards). As a Which? Trusted Trader for over 10 years, we proudly won our second 'Trader of the Month' award in August 2026. Other accolades include being 5-time Network Veka Customer Satisfaction winners and multiple G-Award 'Installer of the Year' finalists.
We guarantee a strict "No Pressure Promise": sales calls are free, no commission-based staff, no hype, and no special "buy one get one free" offers—just honest, competitive pricing. Give us a try, you won't be disappointed!
What we do
Glaziers
- Double glazing installation
- Timber windows
- Sash windows
- Window consultants
- Aluminium Windows
- Double glazed units
- Double glazing repair
- Replacement window services and repairs
- Stained glass
- Triple Glazing
- UPVC Windows
Conservatories
- Hardwood conservatories and orangeries
- Sun Lounge
Doors
- Patio doors
- Timber doors
- Bi-fold doors
- Aluminium doors
- Composite doors
- Front door
- French doors
- UPVC doors
- Door repairs
- Orangeries
My work
Customer reviews
Why you can trust these reviews
All reviews are verified as being genuine and a true customer of this trader.
How can we be so sure?
100% of the reviews we publish have been through our stringent moderation process.
4.9
98 reviews
Recommended
Recommended
by 100% of customers
Sort by
Excellent products & customer service
Customer Service
Quality
Value
So happy with our new windows and doors installed by KJMs extremely professional and crafted engineers; Paul, Lennon & Kerry. From the very start, Charles worked patiently with us ensuring we had the right product for replacing our cottage’s windows and doors. Next Andy ensured everything was made to measure correctly and added the touches that took the look from great to stunning. Engineers Paul & Lennon installed the products with care and clearly they have a high level of craftsmanship.Kerry finished off the stress free process with the final tweaks needed when fitting a high quality product into a 209 year old cottage. And last but not least, Simon’s expert eye ensuring nothing was missed. Thank you to all involved. We are very very pleased with the service and products from KJM and would definitely recommend them
Customer in Hampshire
, work completed
Recommended
Professional and helpful
Customer Service
Quality
Value
Shae and Jordan installed a new lounge window in my house and were very professional and friendly. They competed the installation quickly and left no clear up at all! Happy to recommend KJM as a window fitting service
Customer in Hampshire
, work completed
Recommended
Fantastic Double Glazing Service
Customer Service
Quality
Value
Just had KJM fit 8 double glazing units, including a large bay/box window, and am very happy indeed with the both the workmanship and the quality. A top job done by a very friendly and professional team. Wholeheartedly recommended!
Customer in Hampshire
, work completed
Recommended
Front door and 10 windows replaced
Customer Service
Quality
Value
We are extremely happy with the work that all of the team at KJM carried out recently, from the initial contact, right through to completion. As well as the windows and door being replaced, we also needed to have a lintel fitted. Colin did a fantastic job with this including a perfect match for the bricks. The rest of the team, Lester, Shae, Andy and Liam worked tirelessly and did a brilliant job. They were all very polite and friendly. Nothing was too much trouble. Simon, who was the Site Manager, visited regularly throughout the works and any issues we had were completely resolved and any questions we had were answered. The works were carried out on budget and within schedule. We would thoroughly recommend anybody to use KJM and we would not hesitate to use them again in the future if needed.
Customer in Hampshire
, work completed
Recommended
Great product and service
Customer Service
Quality
Value
We had KJM install some heritage black critical style windows and doors for a ground floor extension. Mark came out and worked out specific heights etc. with the builder to ensure the final looks was what we were after. Installation was a breeze and the guys were lovely to deal with. We also had some white pvc windows on another area of the house. The only down side now is that we need to get the other white pvc windows replaced by KJM as theirs are noticeably better than our existing ones! Great company and would highly recommend.
Customer in Hampshire
, work completed
Recommended
Extension
Customer Service
Quality
Value
This was the first time we’ve used KJM and they done an excellent job as I knew they would do from the moment Paul came out to do the estimate. All tradesmen worked in a clean and tidy fashion and were polite and considerate at all times, even our neighbours commented on how polite and considerate they were. Everything that was on the very detailed schedule of work was carried out to an excellent standard. I wouldn’t hesitate in recommending them. I will definitely be using them again and will not even waste my time looking elsewhere. VERY HAPPY, GREAT JOB! Thank you everyone at KJM.
Customer in Hampshire
, work completed
Recommended
Changing misted double glazed units
Customer Service
Quality
Value
Changed 4 double glazed units. One under warranty, 6 years into a 10 year guarantee, the rest for windows not installed by KJM. No quibbles on the guarantee. Remedial done to fit in with my work schedule. Efficient and friendly service. Would not hesitate to recommend.
Customer in Wiltshire
, work completed
Recommended
Brilliant!
Customer Service
Quality
Value
Called KJM this morning regarding a broken door (not a KJM door). Attended my property very quickly and fixed the problem. Service was outstanding and professional . Great customer service, would highly recommend!
Customer in Hampshire
, work completed
Recommended
Great aftercare
Customer Service
Quality
Value
Kerry arrived on time, was friendly and efficient and did a great job. I would definitely recommend
Customer in Wiltshire
, work completed
Recommended
Window replacement and conservatory new fixed roof and windows plus external doors. Great service and workmanship.
Customer Service
Quality
Value
A great company with very customer-centric staff, from the sales team to the project manager and window fitters. Excellent workmanship, clean and tidy and friendly. Good quality products, we are very happy with the finished product. Delays with suppliers was dealt with professionally with great communication. Delays were also recompensed fairly. We would recommend using this company for all your windows, doors and conservatory changes.
Customer in Hampshire
, work completed
Recommended