Endorsed by Which?

KJM Windows and Conservatories

4.9

81 Reviews

Opening Hours
Today - 09:00–17:00
  • 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

FEBRUARY 2024

About

KJM Windows and Conservatories an multiple award winning company were formed in 1983. Over the years KJM has become a well established and a reputable glazing company, which has gained the trust of thousands of home owners and businesses alike! To date we have installed over £90,000,000 of glazing products. Our diverse range of materials gives you the options that you require. We don't just sell PVCu, but offer timber and aluminium as well. This is backed up with a comprehensive 10 year warranty (insurance backed) that has a proven record. We have many accreditations, including G11, G13, G14 and G15 Installer of the year finalists, Glass and Glazing Federation (GGF) members, Hampshire Trading Standards approved and of course Which? Trusted Traders. Sales calls are free, without pressure and our pricing is competitive. There is no hype or special "buy one get one free" offers, just good honest pricing. Give us a try, you wont 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

Customer reviews

Why you can trust these reviews

All reviews are verified as being genuine and a true customer of this trader.

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100% of the reviews we publish have been through our stringent moderation process.

4.9
81 reviews
Customer Service
4.9
Quality
5.0
Value
4.9
Sort by
New doors, new windows and a new solid conservatory roof
Customer Service
Quality
Value
I recently used KJM to have all the external doors and windows replaced in my home and to have a solid roof installed on an existing conservatory. From start to finish, they have been absolutely outstanding. No pushy sales and no complaints when making changes to the styles of doors and windows we wanted and we made lots of changes. Communication was brilliant and I was kept up to date on a regular basis (particularly as I had the works done over December and January and weather was a concern). The teams who undertook the work were excellent and very hard working often working in very cold conditions. Every evening they would clean up and leave everything spotless. Windows were changed without a need to redecorate. Doors and lovely and work faultlessly. The new conservatory roof has made such a difference and I now have a room I can use. They even came back and spent several hours cleaning the entire conservatory inside and out. All the staff are outstanding and really friendly and the quality of the work cannot be faulted. I couldn't be happier with the results.
Customer in Wiltshire Posted on 21/01/2025 , work completed 21/01/2025
The trader replied (on 23/01/2025)
Thank you so much for taking the time to provide KJM with a Which? 5* review, it is very much appreciated. It is so pleasing to see that the entire KJM team worked to the very highest standards. Thank you again Mark & all the team at KJM
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 Posted on 22/04/2025 , work completed 22/04/2025
Professional
Customer Service
Quality
Value
Having dealt with KJM previously, we knew that they were reliable. The members of the firm all carried out their role in a professional and efficient manner. The installers got on with the job and left with no damage to window surrounds and very clean. Full satisfaction.
Malcolm, Hampshire Posted on 23/08/2018 , work completed 23/08/2018
Install french doors
Customer Service
Quality
Value
I have found working with all of your staff a fantastic experience and your installation has made a huge difference to the refurbishment of our home. Please extend particular thanks to Anthony who had immense patience helping us to work out what we wanted and needed. When we come to doing a full replacement of the windows in a few years you will definitely be our first point of call.
Customer in Hampshire Posted on 03/02/2019 , work completed 23/01/2019
Efficient and friendly service
Customer Service
Quality
Value
Fantastic service from start to finish. The quality of the workmanship is second to none. They replaced all our windows, our front door, and replaced two windows with French doors as well as bricking up our old back door. Friendly workmen whose attention to detail is incredible. Will be recommending to friends and family.
Customer in Hampshire Posted on 23/04/2019 , work completed 03/04/2019
Excellent double glazing firm
Customer Service
Quality
Value
The work was carried out very professionally. The team worked extremely hard in adverse weather conditions. Very pleased with the final product. Have used this firm before and have found their work to be top quality and competitively priced. Also any guarantee work, where necessary, has been carried out promptly and without quibble. Will have no hesitation using them again.
Customer in Hampshire Posted on 22/09/2020 , work completed 19/08/2020
Great job
Customer Service
Quality
Value
Work done to a very high quality. Cleaned after, perfect. Door was a better than thought as heavy but so light on hinges. made so much difference to front of house... bit of class... Windows in house are 25 years plus from KJM so new door had to come from them. So pleased... if they see this thank you...
Customer in Hampshire Posted on 26/11/2020 , work completed 12/09/2020
Very professional, friendly, high standards and tidy
Customer Service
Quality
Value
I had windows and front door fitted. The workmanship was excellent and exceeded my expectations. The people on site were great, friendly, efficient, very hard working, great communicators and extremely helpful. I am very pleased with the end result.
Tina in Hampshire Posted on 24/03/2022 , work completed 24/03/2022
The trader replied (on 25/03/2022)
Tina, thank you for taking the time to provide us with a Which? review, it is very much appreciated. It is a credit to all the KJM team that we exceeded expectations. Thank you again Mark MD KJM Group Ltd
Fitting of 18 UPVC Sliding Sash Windows
Customer Service
Quality
Value
This project was to replace aluminium sliding sash windows that had reached the end of their economic life. The job was made more difficult because the new windows are deeper than the originals. This meant cutting back the reveals in all windows including kitchen and bathrooms that were tiled. The sales process was a pleasant experience, without pressure. Because there were some technical queries it took some time to reach the order stage. Supply from the window manufacturer took some time because of, the now common, supply chain issues. The installation team of 2 persons, clearly demonstrated their wish to do a good job. Their attendance was timely. and they worked in a way that was always considerate of our needs, living in the house. They cleaned and cleared up well every evening. In my opinion they took considerable care to deliver a job that will please the customer. They succeeded.
Customer in Hampshire Posted on 05/07/2022 , work completed 17/12/2021
The trader replied (on 27/07/2022)
Thank you for taking the time to review KJM. I am pleased to see that apart from delivery times, you are pleased with the overall KJM offering. The supply chain, especially with this manufacturer, was especially slow. My apologies for this.
Highly Recommended
Customer Service
Quality
Value
Huge thanks to Emma, Paul, Josh and Charlie for helping us replace some Windows and our front Door. Excellent customer service, fitting and products. Paul helped us decide on the right glass, especially the smoked glass around the door which we are very happy about. This differs from the frosted glass for the bathroom they also installed. In all we had 7 windows and a new front door, at a good price. We shopped around, and came back to KJM. The quality of the windows are well constructed, as is the front door. One issue was resolved at no cost to us, and in a matter of a few weeks (our delay due to covid). Timeline was good from original order and on time as originally discussed when we placed the order. Emma has been great in organising and keeping us informed. Special mention to our fitters, both Josh and Charlie were highly professional, very tidy, and I have to say perfectionists. They asked us along the way our opinions for edging and finishing, and wouldn't accept any defects. Will be using the KJM team again when we come to replace the other windows in the house.
Customer in Hampshire Posted on 21/08/2022 , work completed 17/08/2022