KJM Windows and Conservatories

Andover4.9· 88 reviews · 1 source
Trust score
78out of 100
Rating4.9★
Review volume88
Source diversity1 source
VerificationListed

Based on rating, review volume, independent sources and verification. Evidence context — not a guarantee of workmanship.

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.

Reviews · public evidence

What customers say

4.9out of 5
88 reviews in public evidenceCross-checked across 1 source
Which? Trusted TradersSource profile linked

Highlights

"This is the second time using KJM - they previously replaced our front door - this time they replaced three windows at the back of our house. The whole process from quotation, survey and fitting was brilliant. Just a really nice company to deal with; the quality of all the items we have had fitted are excellent. A big shout out to the fitters, Josh, Charlie and Ryan - what a dream team - they just couldn't have been more helpful and polite and left our house clean and tidy; they really knew how to do their job properly. 100% confidence in this company."

Customer in HampshireWhich? Trusted Traders5.0 rating

"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 WiltshireWhich? Trusted Traders5.0 rating

"To spread the load, KJM have installed windows twice and we have just booked the last phase. They have been very professional each time, from the initial measuring up, then the survey and finally the fitting. I cannot recommend them highly enough. The quality of the finished product has been very impressive, a real upgrade for us."

Customer in WiltshireWhich? Trusted Traders5.0 rating

Detailed reviews

Customer in Hampshire5.0 / 5

This is the second time using KJM - they previously replaced our front door - this time they replaced three windows at the back of our house. The whole process from quotation, survey and fitting was brilliant. Just a really nice company to deal with; the quality of all the items we have had fitted are excellent. A big shout out to the fitters, Josh, Charlie and Ryan - what a dream team - they just couldn't have been more helpful and polite and left our house clean and tidy; they really knew how to do their job properly. 100% confidence in this company.

Which? Trusted Traders
Customer in Wiltshire5.0 / 5

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.

Which? Trusted Traders
Customer in Wiltshire5.0 / 5

To spread the load, KJM have installed windows twice and we have just booked the last phase. They have been very professional each time, from the initial measuring up, then the survey and finally the fitting. I cannot recommend them highly enough. The quality of the finished product has been very impressive, a real upgrade for us.

Which? Trusted Traders
Customer in Hampshire5.0 / 5

Kept in touch all the time from order to installation. Came when they said they would. Excellent workmanship and attention to detail Incredibly tidy and neat. Very courteous and respectful of things like plants around the windows Great products

Which? Trusted Traders
Customer in Hampshire5.0 / 5

KJM have done a good job on our back door. They helped us choose which one would be suitable and then fitted it. Andy did a really neat job and it looks great. We would not hesitate to ask KJM to do further word on our house if required.

Which? Trusted Traders
Customer in Hampshire5.0 / 5

The workmen did an excellent job. I am delighted with the triple glazed windows and front door in my bungalow. The men were unfailingly pleasant and polite. As well as being extremely efficient with the work, they put cloths down straightaway and they vacuumed at the end of each day, leaving everything clean and tidy. They arrived at the time they said they would each day and could not have been more helpful. I was very grateful to have the window and door locks explained in detail and demonstrated. I live on my own as my husband died last September so it was good to have practical things explained. I was told exactly how much it would cost and paid in three stages - a deposit when I booked them, a middle amount when the work started and a final invoice.

Which? Trusted Traders
Customer in Wiltshire5.0 / 5

We had three doors replaced with comp doors. The customer service from start to finish has been exceptional. Honesty from the sales and surveying team, very clean and tidy fitting of the doors by 3 very happy chaps! They made sure we were 100% happy with everything before they left. It has been a pleasure dealing with KJM and we would highly recommend them. Costs were good and there were no hidden surprises.

Which? Trusted Traders
Customer in Wiltshire5.0 / 5

Another professional job from KJM. We have just had a new Solidor front door fitted to our 1930's house. Firstly they gave us helpful advice on choosing the right door for our property and after a few visits to their showroom we made our decision on the door, glass and fixtures. The survey revealed the need for a steel lintel above the door and the subsequent building works were carried out beforehand causing minimum disruption and in keeping with the property. A very professional installation of the door and two side windows was carried out by the two fitters who kept everything very clean and tidy whilst they worked. This was the third time we have used KJM having previously had two bay windows and several other windows replaced by their team over the past four years. We are very pleased with all the works carried out by KJM, everyone in their team is helpful, polite and friendly and we would not hesitate to recommend this company.

Which? Trusted Traders
Customer in Hampshire5.0 / 5

i have had 2 jobs done by KJM the first was an emergency pain of glass that they came round measured up and secured the window from the weather and did a great price for me to get it repaired. the second was a replacement door again the measured quickly and the fitted the door with fantastic workmanship. they are a very good company to deal with they are friendly with great customer service. the quality of there work is fantastic and they are very well priced.

Which? Trusted Traders
Customer in Hampshire5.0 / 5

Thank you KJM. We have just had a Compdoor fitted by the excellent team of Charlie and Josh. The product is top quality as expected from KJM and so much better than the ‘new build’ front door fitted by the developer. It looks good too. Charlie and Josh worked in the pouring rain but with great humour and so helpful with explanations. A great team and a credit to KJM.

Which? Trusted Traders
Customer in Wiltshire5.0 / 5

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.

Which? Trusted Traders
Customer in Hampshire5.0 / 5

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.

Which? Trusted Traders
Customer in Hampshire5.0 / 5

I have been a customer of KJM for over 30 years and have had windows, doors and a conservatory in that time. The service has always been exemplary as has the quality of the products and pricing has always been more than fair. The latest visit was to replace some glass and the fitter was as always friendly, polite and professional. Also, KJM managed to schedule us in before Xmas - which was very much appreciated.

Which? Trusted Traders
Customer in Hampshire5.0 / 5

The work was to remove our front door and to replace it with a made-to-measure high-grade composite item. Our fitter, Andy, was really very good. He arrived slightly early, which was totally OK and took the expected time to do the work. Installation was straight forward and he was neat, quick, professional and very friendly. It was a pleasure having him in the house. The product was exactly as ordered and the cost was exactly as quoted. It exceeded our expectations. The service included disposal of the old door, all parts to be recycled it seems - another positive. The work was inspected by a surveyor as soon as it was completed, enabling us to talk about how we found the service - another significant positive.

Which? Trusted Traders
Customer in Wiltshire5.0 / 5

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.

Which? Trusted Traders
Customer in Hampshire5.0 / 5

As a Commercial Construction Project Manager I cannot recommend highly enough the service and window installation that KJM carried out on my home. From initial enquiry to completion, their communication and service was exemplary. The final product installation was spot on. Very happy and am instructing them to now install external doors.

Which? Trusted Traders
Customer in Hampshire5.0 / 5

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.

Which? Trusted Traders
Customer in Wiltshire5.0 / 5

Kerry arrived on time, was friendly and efficient and did a great job. I would definitely recommend

Which? Trusted Traders
Customer in Hampshire4.3 / 5

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!

Which? Trusted Traders
Customer in Wiltshire5.0 / 5

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.

Which? Trusted Traders
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Public review evidence4.9★ from 88 public reviewsWhich? Trusted Traders
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Strong signals
Rating: 4.9★
Review volume: 88
!Worth checking yourself
!Source diversity: 1 source
!Verification: Listed

Public evidence last checked May 2026

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