Endorsed by Which?

KJM Windows and Conservatories

4.9

86 Reviews

Opening Hours
Today -
  • 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
86 reviews
Customer Service
4.9
Quality
5.0
Value
4.9
Sort by
Conservatory
Customer Service
Quality
Value
Had a conservatory built. From start to finish has been brilliant. Lee sorted every thing out with the lads. All the lads have been lovely. Really good at what they all do. Plastering too was brill. Can not fault any of there work. Thanks again to KJM for doing a grand job. Love Dawn Chris. Ted my little dog they all loved. xx
Customer in Hampshire Posted on 18/03/2022 , work completed 17/03/2022
The trader replied (on 25/03/2022)
Dawn, 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 recieved 5* as I know there were some challenges with the project. Thank you again Mark MD KJM Group Ltd
Out of warranty work
Customer Service
Quality
Value
My new door was fitted sixteen months ago but had an alignment problem. I called KJM who immediately organised an engineer to visit to rectify the issue, all at not cost, even though the warranty had expired. I am particularly impressed with your pride in delivering customer satisfaction, even though my door was fitted around sixteen months ago. This level of pride and commitment has not gone unnoticed. You can be sure that KJM is on my list of top quality companies and therefore receive my highest recommendation. Thanks once again to KJM for a truly outstanding service.
Simon in Hampshire Posted on 20/04/2022 , work completed 14/04/2022
The trader replied (on 29/04/2022)
Simon, thank you for taking the time to review our after-sales service. I do believe that the door would still have been in warranty, so I could not let that comment go without a reply to you. However whatever the cause, we do try and maintain the best customer service we can, something that has not been as good as I would of liked during the darkest days of COVID. Hopefully, that has gone. Thank you again
Excellent work from start to finish.
Customer Service
Quality
Value
Replacement of three old windows with white uPVC to match existing with period monkey tail handles. Efficient customer service. Installation on time finished by experienced staff in a day. Value for money and we are very happy with the result.
Customer in Hampshire Posted on 19/11/2022 , work completed 20/09/2022
The trader replied (on 13/02/2023)
Good afternoon, my apologies for the delay in replying to you. I always look for a few words that make me happy in a review. In your case its "efficient customer service" and "value for money" Thank you so much for taking the time to give KJM a Which? review
Very Pleased Customer
Customer Service
Quality
Value
KJM were very professional and helpful from quotation time through to completion of installation. The job entailed taking out old single-glazed windows and doors to our preschool hall and installing new uPVC double-glazed units. Whilst quoting the job they made a very helpful suggestion to help save cost. Once we accepted their offer ( which was very competitive) they agreed an installation date which was adhered to. The installation team were amazingly helpful and the finished job, done on time and on budget is first class!
Richard in Andover Posted on 15/03/2023 , work completed 15/02/2023
The trader replied (on 22/04/2023)
Richard, thank you so much for taking the time to leave KJM a review for the recently completed works. I am pleased to hear that we were competitive and the fitters were amazingly helpful. Mark and all the team at KJM
Conservatory conversion
Customer Service
Quality
Value
We are delighted with our new solid roof, Ben and Mike, the fitters, were friendly, professional and nothing was to much trouble. Any slight problems incurred were highlighted, discussed and completed to a high degree. They worked cleanly and cleared up as they went to keep the site as clean as possible. Special mention for the electrian, Dominic and the plastering team that sorted the inside of the conversion, all works were completed cleanly and to the highest standards. We were also consulted all through the build by Brian, can't recommend KJM highly enough, thank you for a great job.
Customer in Hampshire Posted on 19/10/2024 , work completed 18/10/2024
The trader replied (on 22/10/2024)
Thank you so much for taking the time to provide KJM with a Which? 5* review, it is very much appreciated. I am so pleased to see all the team provided you with the service level I expect. Thank you again Mark & all the team at KJM
Window Replacement
Customer Service
Quality
Value
KJM replaced all our windows and doors some 27 years ago and they finally required replacing with modern glazing. It was therefore an easy decision to return to KJM as a tried and trusted local business. We initially replaced our aged front door - the change was immediately noticeable. As a result we decided to replace all our old windows. We discussed at length all our options and decided to go with the triple glazing option despite the obvious increase in price as a result. There was a delay in fitting from order but that was down to us being away - fitting could have taken place 4 - 6 weeks from the order placement otherwise. We had initially been told that turnaround would be about 12 weeks but I think that is a worse case scenario as in reality turnaround was much quicker. It took two days to remove and replace all 8 window units. The fitters where on-time both mornings, very professional, tidy and quiet - apart from the noise when actually removing the old units. We were a little concerned that we might have had to redecorate around the window frames as a result of the work but we needn't have worried as no damage was sustained and the units fitted perfectly. They left no mess and even spotted two minor flaws in two of the glass units which were replaced within three weeks. We are happy with the result and have no hesitation in recommending KJM.
Customer in Hampshire Posted on 10/10/2023 , work completed 12/09/2023
The trader replied (on 27/10/2023)
Thank you for taking the time to provide such an extensive review on KJM. Having been with the company for 40 years, it is becoming more common to see returning customers who are updating their windows and doors with modern energy efficient glazing. The irony is not lost on me when I consider that I sold you the original windows and the fact your new windows were installed by a team including my son who was not even born on our first visit. KJM’s customer service and attention to detail is why we are still considered by many through recommendation. Thank you again Mark & all 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
The trader replied (on 28/05/2025)
Thank you for taking the time to review the service Kerry provided. Friendly and efficient are words I like to see. Mark and all the team at KJM
Excellent Replacement Windows and Affordable
Customer Service
Quality
Value
We found KJM via Google whilst searching for 4 replacement windows with integral blinds. We visited their showroom and viewed some samples at the same time they give us a quote for the work. We set a date, for a visit, for them to measure up (check my measurements). Thankfully the original figure didn't change for the worse and we booked in the job. On the fitting day the fitters turned up early and had the job completed by around 3.30pm. I must admit from start to finish their service was excellent. I felt that they knew what they were doing and didn't hide anything from me. The fitters workmanship was super. They were friendly, helpful and and discussed the work as it progressed. My house is very old and getting the windows square didn't seem to cause an issue. All in all my wife and I are very pleased with the result and we have had lots of admiring comments from my neighbours. Would I recommend KJM to any prospective customer - yes I would in a flash.
Customer in Wiltshire Posted on 22/02/2024 , work completed 15/02/2024
The trader replied (on 24/02/2024)
Thank you for the comprehensive 5* review of KJM. If nobody read anything but the last sentence, it sums up what we strive for as a business. "Would I recommend KJM to any prospective customer - yes I would in a flash" Music to my ears. Mark and all the team at KJM
Excellent service and installation
Customer Service
Quality
Value
We are delighted by the new windows: the team installing them was very professional and took a real pride in their work. There was one slight moment with a piece of broken glass but it is being sorted and was well managed.
Customer in Hampshire Posted on 05/02/2024 , work completed 25/01/2024
The trader replied (on 14/02/2024)
Thank you for taking the time to review KJM, its is very much appreciated. It is good to see the words "professional and pride" in your review. Thank you again from Mark and all the team at KJM
Replacement windows in conservation area
Customer Service
Quality
Value
An excellent service from start to finish, from valuable initial advice (especially important on choice of windows as we live in a conservation area) through to the craftsmanship of the fitting and finishing. The actual windows themselves are superb quality and we could feel the difference in our home immediately. The team were superb and couldn't do enough to make sure we were happy.
Customer in Wiltshire Posted on 20/09/2024 , work completed 30/08/2024
The trader replied (on 24/09/2024)
Thank you for the glowing 5* Which? review on all aspects of KJM's service levels. We strive for perfection and total customer satisfaction on each and every job, so its a pleasure to read your review. Thank you again from Mark and all the team at KJM
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 Posted on 21/11/2025 , work completed 16/10/2025