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Endorsed by Which?
KJM Windows and Conservatories
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
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 work, finished on time.
Customer Service
Quality
Value
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.
Customer in Hampshire
, work completed
Recommended
New back door
Customer Service
Quality
Value
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.
Customer in Hampshire
, work completed
Recommended
Great double glazing company
Customer Service
Quality
Value
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
Customer in Hampshire
, work completed
Recommended
We wouldn't go anywhere else
Customer Service
Quality
Value
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 Wiltshire
, work completed
Recommended
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
, work completed
Recommended
Fabulous all round service from KJM
Customer Service
Quality
Value
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 Hampshire
, work completed
Recommended
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
, work completed
Recommended
Excellent service
Customer Service
Quality
Value
After being let down badly whilst with another large company my confidence of trying with another company was shattered.But KJM were amazing from start to the finish of completion of the instalation of my windows I could not have used a better company they were friendly helpful and absolutely nothing was too much trouble, there were no problems at all from start to finish and I will definately be using them again, and will be recommending to everyone I know 100 percent brilliant company and staff .
Customer in Hampshire
, work completed
Recommended
Excellent work
Customer Service
Quality
Value
I had 3 new windows fitted last week. Lester & Liam worked very hard & efficiently. I am extremely pleased with the windows & their fitting. It was also reassuring to have Simon check on & discuss their progress with me every day.
Customer in Hampshire
, work completed
Recommended
Excellent work throughout.
Customer Service
Quality
Value
Many thanks for making such an excellent job of replacing the roof of our existing conservatory. After the initial quote, we were able to go with a representative to see a roof replacement in our area and we were very impressed with the work. We decided to use KJM for our roof. From start to finish they took over the project. Drawings and planning were all done on our behalf. All the various workmen liaised together very well and explained what they were doing at all stages. The existing floor was carefully covered, and the lights were fitted into the ceiling. All the site was cleared after the work and left neat and tidy. Plastering was included so we only needed to find a decorator. We are delighted with all the work and it has changed from a conservatory to a room which is part of the house. We would definitely recommend KJM if you are considering improvements of this type.
Customer in Hampshire
, work completed
Recommended