Trading Since 1983 • Which? Trusted Trader • No Sub-Contract Fitters
Andover & Hampshire Home Improvements: Windows, Doors & Conservatories
No Pressure Promise
Since 1983, KJM Group has championed a ‘No Pressure Promise’ across Andover and Hampshire. Unlike many competitors, our design team is non-commissioned, meaning we offer honest advice rather than aggressive sales tactics.
We provide detailed, written quotations for you to review in the comfort of your own home at your own pace. There are no ‘sign on the day’ gimmicks or hidden clauses—just transparent pricing and the freedom to get back to us whenever you are ready
Trusted Home Improvements in Hampshire
Since 1983, KJM Group has been the go-to specialist for high-performance windows, doors, and conservatories across Andover, Winchester, and the wider Hampshire region. Unlike general builders, we focus exclusively on quality fenestration.
We offer a comprehensive range of materials to suit every property style:
- uPVC Windows: Energy-efficient, A-rated casement and tilt & turn styles.
- Heritage Timber Alternatives: The Residence Collection (R9) and Roseview Sash windows, approved for many local Conservation Areas.
- Aluminium Systems: Slimline bi-fold doors and windows for modern extensions.
- Hardwood & Timber: Sustainable, hand-finished wooden joinery.
Whether you are in Winchester, Salisbury, or right here in Andover, our employed installation teams (no sub-contractors) ensure a perfect finish every time.
£100 Million Installed
Since 1983, we have installed over £100 million worth of home improvements across Hampshire. We are built to last.
25,000+ Installations
Thousands of local homeowners have trusted KJM. We don't just claim to be reliable; the data speaks for itself.
Which? Trusted Trader
We hold a near-perfect 4.9/5 rating and were named "Trusted Trader of the Month" (Feb 2024) for our high standards.
9.87/10 Checkatrade
Based on 360+ reviews. Our customers rate us 9.92 for Reliability and 9.90 for Tidiness.
4.9/5 Google Reviews
With hundreds of genuine reviews, this consistency proves we deliver quality over decades, not just a lucky streak.
10-Year Warranty
Total peace of mind. All our installations come with a comprehensive, insurance-backed guarantee as standard.
Our Range
The KJM Customer Promise
We don't just fit windows; we deliver a stress-free experience from quote to completion.
No Pressure Sales
We hate "hard sells" as much as you do. Our team are employed staff, not commission-only agents. We provide a detailed written quote and leave you to decide.
Expert Technical Survey
Before we manufacture anything, our senior surveyor visits to take millimetre-perfect measurements, ensuring your new products fit your home seamlessly.
Employed Fitting Teams
We do not use random sub-contractors. Our installers are directly employed, uniformed, and trained by KJM to meet our high standards of workmanship.
Tidy Home Guarantee
We treat your home with respect. Our teams use dust sheets, vacuum up after themselves, and remove all old materials and debris when they leave.
British Made Quality
We champion British manufacturing. Every window and door is custom-made in the UK to your exact specifications, ensuring superior quality.
Dedicated Aftercare
Our relationship doesn't end at installation. We have a dedicated service engineer to handle any adjustments or queries you might have in the future.
Request a Quote
Offering a no hassle, no pressure approach to our quotation, you can request a quote today to view whenever you need it.
Contact Us
If you have any questions about our products or services, contact us today using the contact form, and we will endeavour to assist you as soon as possible.
Product Gallery
Our extensive product catalogue covers everything from energy-efficient uPVC and sleek aluminium windows to high-security composite doors and tiled conservatory roof replacements.
At KJM Group, we believe seeing is believing. Choosing the right style for your home can be difficult from a brochure alone. That is why we have curated a gallery of our recent projects across Andover and Hampshire. Explore our installation photography to see the quality of our finish and find the perfect inspiration for your own home improvement project.”
Our Products
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START A QUOTETestimonials
Chosen on recommendation and they didn’t disappoint. A local company with excellent values and a personal service. From the initial visit and assessment with Charles to the fitting by Paul and Lennon, the service was excellent. People that know what they are doing and go the extra mile to look after your home as if it was their own.
The products are top quality and we couldn’t be happier with the finish. On completion Simon was on hand to listen to our feedback and take on board our reflection of our experience. Thank you all, we would 100% recommend you.
Lisa Taverner
What can I say. From start to finish these guys have been absolutely amazing. From the quote, measuring, pre-work through to installing the new windows & doors, everyone has been great.
Josh, Jordan & Shay who did the installation were fabulous. Incredibly hardworking, polite, friendly, and tidy. Can’t recommend them enough. Thank you KJM for a stress free week.
Maggie Crosby
I’ve used KJM for a few replacement and new windows/doors over the years. Their service has always been great, particularly any after sales/maintenance required. I’ve recently had a replacement window fitted and I was blown away at the professionalism of the fitters.
Charlie, Ryan and Peter were so polite, considerate and tidy throughout the fitting. The first thing they did was put down floor protection and dust sheets from the entrance to where the window was being fitted, the last thing they did was sweep the area outside where they were working. I dare say the area was tidier after they left than it was beforehand! They truly are a credit to the company and are more than I could hope for from a local business.
Archie Sturt
Had a great team today fitting new conservatory doors as well as a new front door. Lesley and Liam, a father and son partnership did an amazing job.
Firstly the conservatory doors look amazing, they are new doors fitted to a 28 year old conservatory! The result is outstanding, so a big shout out to KJM, Lexter & Liam.
The front door looks classy, a great new addition to the house.
We are so pleased with the result and would highly recommend KJM, and if you are lucky enough to get Lester & Liam you are in safe hands.
A very satisfied customer!😊
Lisa Wearn
Check Out A Recent Customer Testimonial
Awards and Accreditations
Frequently Asked Questions
KJM Group has been trading since 1983. With over 40 years of experience serving Andover, Winchester, and the wider Hampshire region, we are one of the area's longest-established home improvement companies. This longevity provides you with security and peace of mind.
We directly employ our own installation teams. Unlike many competitors who rely on sub-contractors, using our own trained staff allows us to maintain strict quality control, ensure reliability, and provide a polite, professional service in your home.
Yes. We are fully accredited. KJM Group is a registered member of FENSA and the Glass & Glazing Federation (GGF). We are also Trustmark approved and a member of the Hampshire County Council "Buy With Confidence" scheme.
Yes, absolutely. We have a fully stocked showroom in Andover (Mylen Business Centre, SP10 3HR). We encourage you to visit us to see and feel the quality of our windows, doors, and conservatory/solid roofs before you commit.
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