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

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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
Excellent installation
Customer Service
Quality
Value
KJM installed 4 windows and a new front door for us. Really everything was faultless. The quality of the products is great, the ordering process went smoothly, and the installation was first class Aiden and Josh were the installers. They worked well as a team, there was no redecorating required, they showed creativity in overcoming any issues in the fitting, and kept me informed at all stages. Everything was also very clean when they were done. Good job!
Simon in Hampshire Posted on 04/05/2022 , work completed 14/04/2022
The trader replied (on 25/05/2022)
Simon, thank you for taking the time to provide us with a Which? Trusted Trader review, it is very much appreciated. Its great to hear that the whole process from sale to product and installation is recommended. Thank you again
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
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
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
KJM door fitting
Customer Service
Quality
Value
KJM were very professional, from the initial assessment and quote stage, through to delivery and fitting. The fitters, Aiden and Josh, had to take out some brickwork to fit the door and were careful to minimise the mess and clean up afterwards. They also came back a second time to fit the trim, allowing time for an electrician to route some cabling. All in all, a first rate, good value, service from a local company. Job done!
Customer in Hampshire Posted on 17/03/2022 , work completed 11/03/2022
The trader replied (on 25/03/2022)
Thank you for taking the time to provide us with a Which? review, it is very much appreciated. It is good to hear that we 'were very prfessional' and Josh and Aiden were clean and tidy. Thank you again Mark MD KJM Group Ltd
Great workmen
Customer Service
Quality
Value
My landlord sorted everything with kjm so I can only comment on the workmen that came out today, they are very respectful, funny and kind! They take pride in their work and make sure they clean up after themselves and they are very good around children, definitely highly recommended!
Customer in Hampshire Posted on 12/03/2022 , work completed 12/03/2022
The trader replied (on 25/03/2022)
Thank you for taking the time to provide us with a Which? review, it is very much appreciated. I am very pleased to hear that the fitters were respectful, kind and funny. I will check to see who they were :-) Thank you again Mark MD KJM Group Ltd
Fantastic service and product
Customer Service
Quality
Value
We had previously used KJM as part of a build project to fit bi-fold doors and were very pleased with the outcome. We dropped into their showroom to discuss replacing the other 12 windows as they were over 25 years old, an advisor came out to see us firstly asking what type/look of windows we wanted and then talked us through our options including the standard of frames and glass available and produced a detailed costing. At this point I should mention there is no messing around with KJM on here’s a cost! Let’s take this off for this and that and arriving at a final price, (as with so many competitors) you are given the cost at the beginning…no messing around! Arranging fitting was so easy as was changing it and was carried out professionally and with great care. The fitters explained what they were going to do and got on with the job efficiently and with a friendly manner. Job took just under three days and everything was left perfectly tidy each day. At the end of the fit we were walked through the operation of the windows, ongoing care and service by KJM and to check we were satisfied with the finishing of the fitting. Very good local company and professional service. Great product and fantastic looking new windows.
Customer in Hampshire Posted on 09/03/2022 , work completed 09/03/2022
The trader replied (on 10/03/2022)
Thank you for taking the time to review KJM. I am pleased to hear that all parts of our service met expectations. Employing our own staff means that sales-commissions are not a part of 'our sales patter' hence the good old fashioned honest pricing policy. That way will always be our way of doing business! Thank you again!
KJM secondary glaze project
Customer Service
Quality
Value
Second time I've installed a secondary glaze and first time with KJM. Big project and very professional/pleasant. I'm very pleased with the quality of product and installation; hardly tell it's there after a week. All about heat retention, as a priority, not sound, and KJM worked with me on this. Both the install teams were v knowledgeable, efficient and tidy. Only downside is the lead times as v busy
Customer in Hampshire Posted on 07/03/2022 , work completed 07/03/2022
The trader replied (on 10/03/2022)
Thank you for taking the time to review KJM, we really do appreciate it. I am pleased to hear that we treated you well and can only apologise about the length you had to wait. The pandemic made us very busy with a very slow supply chain. Things have now improved and lead times are much lower. Thank you again
Fantastic work - efficient and tidy
Customer Service
Quality
Value
KJM came to replace 6 windows including a bay, front door and French doors where a window was prior to the job. They deserve huge praise for their quality of work, which is outstanding. They were more than happy to make small amendments where they could, even asked us how we'd like certain things I wouldn't have even thought of. They walked us through every step of the process, the what's and why's and made sure we were 100% happy with the result. They were extremely accommodating with some of my OCD wishes for continuity and aesthetics. They were true to their word and arrived when they said they would; if not a little earlier. They also cleared up all mess they made, to the point of mopping the kitchen floor! After all is said and done, you wouldn't have even known they were here. Although no work is ever perfect, they came round and took the very few concerns we had and ensured a resolution was put in place - I cannot possibly fault any part of the process from beginning to end. I will be using KJMs services again in the near future for further work.
Customer in Hampshire Posted on 10/12/2021 , work completed 08/12/2021
Would Highly Recommend KJM Windows......
Customer Service
Quality
Value
We recently had our front windows replaced and a new front door fitted by KJM. Firstly, I would like to say what a lovely and honest guy Mark the owner is, he came and measured up and quoted us for the work originally and was very helpful and even adjusted our doors we weren't having changed and advised us on what replacement handle we needed to buy, at no cost to ourselves, what a star! I will say our quote was very competitive and the quality of our windows and door are amazing and we are so pleased. We had a problem with part of our door fitting due to a manufacturing fault, Mark came round personally and we had discussions and he went away and re-ordered the part in question and recitfied the situation. I am going to mark the company down by a point on Customer Service, as I feel they could have been a bit more proactive in updating us to what was happening between the point of ordering and fitting the windows and I had to chase them. I am fully aware of the current econmic situation and what businesses are up against but because of this, there is more than likely to be more waiting time and delays for the customer, so I then think it is even more imperative the customer is fully informed and updated at all times. This is my only slight niggle, otherwise it would have been full marks and it is definately full marks for Mark. All in all, I would not hesitate to recommend KJM, they are very honest and trustworthy and you will not be disappointed!Thank you Mark & Team
Customer in Wiltshire Posted on 30/11/2021 , work completed 15/11/2021
Fast, expert, fair
Customer Service
Quality
Value
We had a problem with a PVC replacement door not locking. We asked locally and got recommendations for KJM. Called late afternoon to speak with the owner and received a promise for a visit the next morning. Mark turned up at 08:00, and by 08.10 had the door working again. Didn't stop there though. Spent the next 15 minutes adjusting everything and anything until the door fitted and worked better than at any time since it was fitted. After all that, refused to take a payment since he'd been at another appointment a short drive away. I can't recommend this group and it's boss highly enough.
Customer in Hampshire Posted on 30/09/2021 , work completed 30/09/2021
The trader replied (on 10/03/2022)
Little things can make a customer happy, I'm glad I managed that. I hope all is well at your end? Our conversation I will remember forever. You take care. Mark
Quick, reliable and brilliant work
Customer Service
Quality
Value
Really impressed with KJM - a brilliant experience from start to finish. From the initial visit and measurements to the installation work itself, the experience couldn’t have been better. The installation work was completed quickly and conscientiously, and the quality finish is superb. Very satisfied customers.
Customer in Hampshire Posted on 16/03/2021 , work completed 08/03/2021
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
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
KJM windows are excellent
Customer Service
Quality
Value
KJM have fitted all the new doors and windows for our 4 bedroom house and we are absolutely delighted with them. The price was good and work excellent. The porch, doors and bay window were tricky jobs and are now airtight and immaculate. All the windows are beautifully finished off and look lovely. The workers were polite and hardworking, and took care and pride in their work. I couldn't be more pleased and wholeheartedly recommend them.
Customer in Hampshire Posted on 05/09/2020 , work completed 02/09/2020
Door replacement
Customer Service
Quality
Value
The door fitting was very efficient, tidy and really good standard. The fitter was very friendly and prompt, ensuring everything was in place and working before leaving. Initial quote process was thorough so no need for any follow up visit. Could have done with an earlier update between quote completion and fitting date.
Customer in West Berkshire Posted on 22/10/2019 , work completed 22/08/2019
The trader replied (on 11/12/2019)
Thank you for taking the time to review KJM. I am more than happy that your overall experience was a positive one. I will ensure that we try and improve the communication with regards fitting dates. Thank you again and Seasons Greetings. Mark and the KJM team
KGM gave excellent service from the initial meeting to discuss our requirements through to efficent installation and prompt problem solving
Customer Service
Quality
Value
Our requirement was to replace 4 double-glazed units in two 35-year-old large windows (one with 6 panes & the other with 3). We had 3 quotations and the KGM Sales Manager who visited our home was head and shoulders above the others in his technical knowledge. He recommended that we replace all the glass to avoid a visual difference between the new and old, and that we replace the aluminium frames because of the much better thermal properties of modern frames. It was agreed that we would retain the mahogany frames into which the aluminium frames were mounted. When it came to the installation and the first aluminium frame was removed an unforeseen problem came to light - the sides, top and bottom of the old frames were "stepped" whereas the new ones were flat and would not fit. The installers phoned the office and the MD and Sales Mgr were on site within 40 minutes. They were extremely apologetic and soon decided that either in-situ modification to the wooden frames was required or new frames. The carefully removed frame and glass were reinstalled. Within two days we were told that new mahogany frames, stained to match all the others in the house, would be supplied in 3-4 weeks. The installation was then completed in two days. Aidan and Carl worked efficiently, neatly cleanly and tidily. No touching up was needed inside and very little outside. I have no hesitation in recommending KGM for all aspects of their work but especially for their problem solving skills.
Customer in Hampshire Posted on 23/09/2019 , work completed 17/09/2019
Great service
Customer Service
Quality
Value
Arrived on time, very friendly and very, very tidy. Excellent finish to job i.e. edging to wall tiles & floor tiles.
Moya, Hampshire Posted on 08/08/2019 , work completed 08/08/2019
Prompt and professional - 100%
Customer Service
Quality
Value
Work done was to replace a new patio door. Everything was carried out in total perfection, from office to workforce we were totally impressed and our new doors are simply great.
Peter, Hampshire Posted on 02/08/2019 , work completed 02/08/2019
Extremely Satisfied
Customer Service
Quality
Value
Our requirements were discussed beforehand, the fitters were polite and courteous, the work is to a high standard and extremely satisfactory
Customer in Hampshire Posted on 01/08/2019 , work completed 23/07/2019
Replacement windows and door
Customer Service
Quality
Value
We had 2 guys installing windows and a door this week. We live on a main road out of Southampton, and it can get very noisy. The windows are great quality and reduced the noise to a quiet hum. The 2 guys were a pleasure to have in the house. Polite, cheerful, tidy and prompt.
Customer in Southampton Posted on 04/06/2019 , work completed 04/06/2019
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
Great service from KJM
Customer Service
Quality
Value
This was the first time we had bought windows and door for a property, so went in with only a basic idea what we wanted and needed. We had a few quotes from a few different companies, the first thing that stood out about KJM was the Sales Consultant Luke F. Luke appears to genuinely want to get the best deal for the homeowner and KJM, he explained the range of products and the pro’s and con’s of each and gave his personal opinion when I asked him to. He didn’t try to push a sale at any point and went away to work out a proper quote for the work we requested. The 2 gentlemen turned up bang on time on the day of install, and did the work to a high standard. They were careful around the house to make sure they didn’t make any mess or cause any damage. The install took a few hours and a full demonstration was given at the end. We are totally satisfied with the work and price we paid. I wouldn’t hesitate to recommend KJM to friends and family!
Customer in Hampshire Posted on 10/04/2019 , work completed 04/04/2019
New Front Door
Customer Service
Quality
Value
KJM replaced and fitted a new front door for us. The experience from beginning to end was impressive and we are very happy with the product. The door looks great and the workmanship carried out fitting the door is exceptional. The work was carried out at the agreed price and on an amicably agreed date. All dealings with the KJM staff have been nothing but helpful and we would have no hesitation in recommending them and no doubt will have work done by them in the future.
Customer in Hampshire Posted on 03/04/2019 , work completed 05/02/2019
Brilliant work and price
Customer Service
Quality
Value
KJM recently installed triple glazed windows and doors very efficiently at the back and sides of the house. Very very pleased with the work completed, the total cost and the very friendly manner in which the whole matter was carried out and no pressure to complete the order. Thoroughly recommend KJM. Am now proceeding with getting the front of the house triple glazed. Many thanks once again
Customer in Hampshire Posted on 04/03/2019 , work completed 26/02/2019