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
We have used KJM for a few jobs in the last few months. We can’t recommend them highly enough. Superb service, from the whole of the team, from beginning to end. The front door was a bit of an emergency so Paul squeezed us in for measuring up, and Emma offered us the first opportunity available for installing.
Josh and Charlie fitted all 3 jobs, and were very tidy, friendly and respectful, really nice guys. Great service & great products – we will be going back to them to replace the rest of the windows when we are in a position to do so.
Laura Hallsworth
Recently had a new door installed by KJM and cannot fault them at all. From start to finish the whole team was professional and so easy to deal with. Kept us updated throughout and the fitters were great – we have a vulnerable adult living with us and the fitters even took time to ask if there were any considerations for them ahead of the work.
The work was done ahead of time and to a great standard and we’re incredibly pleased with the result. Won’t hesitate to use them again and recommend to others – a shining example of top-notch service.
Simon Rees
Great team to engage with! KJM were a referral and were very easy to deal with, knew the products, discussed our options and very fast to respond to any queries or similar. The product is great – does exactly what it should and we couldn’t be happier with the service.
The fitting team were excellent, no mess, no rubbish left behind and always polite, professional and real grafters. It’s unlikely we will need to replace these windows or doors, but if we ever move, I would be straight back onto KJM to replace them in the new house.
Craig Garrod
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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