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KJM's Credentials - We have won many awards for Customer Service & Conservatory design


KJM were formed in December 1982, we started life as KJM Replacement Windows Ltd and it was decided that as our range of products grew over the years and included conservatories, that we changed our name. So the company was renamed KJM Group Ltd. Over the years KJM has become a well established and a reputable company, which has gained the trust of thousands of home owners and businesses alike! We have been named as one of the top five UK companies no less than five times by our peers. Our diverse range of products gives you the options that you may require. We don’t just sell PVCu, but offer timber and aluminium as well. We backed this up with a comprehensive 10 year warranty (insurance backed) that has a proven record. Sales calls are free, without pressure and our pricing is competitive. Give us a try, you wont be disappointed


KJM are members of the Glass & Glazing Federation

Our list of achievements includes the following:

  • Which? Trusted Trader of the Month February 2024
  • Winner Test Valley Business Awards 2015 (Customer Service)
  • National finalists Network Veka awards 2015
  • Winner of three national conservatory awards
  • Winner Network Veka customer satisfaction 2013, 2014 & 2015
  • Winner “Customer Service Excellence” Inspire 2014
  • Finalist “Customer Service Excellence” Inspire 2013
  • Finalist G11 awards “Installer of the Year” 2011
  • Finalist G13 awards “Installer of the Year” 2013
  • Finalist G14 awards “Installer of the Year” 2014
  • Finalist G15 awards “Installer of the Year” 2015
  • Winner of Network Veka’s customer service award five times
  • Veka Approved Installer
  • Approved by Hampshire Trading Standards
  • Fensa Registered
  • Independent Network member
  • Member of the Ultra Installer Conservatory scheme
  • Member of Check-a-Trade
  • Maintained large commercial contracts due to customer service over many years, in one case over 30 years!

The KJM Group were successfully endorsed as a Which? Trusted Trader Approved provider in June 2014.

Which? Trusted Traders works by recognising and endorsing good services and businesses. The Which? logo is widely recognised and a mark of excellence that helps consumers make the best purchase decisions possible for their needs.

Unlike other schemes, Which? Trusted Traders do much more than just check references and qualifications. The Which? Trusted Trader assessment is a thorough audit and our services.

The Which? brand has been rigorously testing products and services for over 60 years. Known as “The UK’s Consumer champion” giving consumers unbiased insight enabling them to make an informed decision about making a purchase or using a service. Which? have over 1.5 million members and supporters, making them the largest independent consumer body in the UK. They have been working on behalf of consumers since 1957. Now Which? is doing the same for traders and not just anyone can become endorsed. Only those who meet their high standards are credited with Which? Trusted trader status.

The endorsement checks include:

  • References
  • A financial health check
  • Interview and assessment
  • Code of Conduct agreement

KJM are committed to the Which? Trusted Traders code of conduct and are regularly assessed to ensure we continue to meet the high standards of the Which? Trusted Traders consumer association. We have to address any issues identified in order to keep our Which? Trusted Trader Approved Service status.

An extra benefit of using Which? Trusted Traders is that Which? have Alternative Dispute Resolution (ADR) on hand to offer extra peace of mind, which provides independent dispute resolution to Which? Trusted trader customers. You can find more information about this in the “page tba on new website”

Our Which? profile can be found on their website, and they are also very happy to receive further reviews about our business. Every review is checked by Which? to ensure it is genuine, so that you have full confidence in the reviews and ratings.

About KJM

Originally manufacturing our own windows on West Portway Industrial Estate in Andover, the company concentrated on uPVC windows as we were unable to manufacture anything else. In these early years, KJM won some substantial commercial contracts.

Over time the economics of manufacturing on a relatively small scale proved not to be cost-effective and, with many new materials becoming available, and customer trends requiring a more diverse range of products, we ceased manufacturing in 1996. This move enabled KJM to offer a much larger product portfolio. Today we can offer a huge range of windows, doors and conservatories in uPVC, aluminium and hardwood.

Infinity Timber Effect Windows Andover & Hampshire

Our Services

We, understand the principle that people may require a quotation to find out a cost and not be bullied into making a purchase.

Customer service is paramount to KJM as we rely on most of our business coming through recommendation. No one can promise that every job will run absolutely perfectly – even the best has the odd hitch on rare occasions, but we can assure you that we strive for complete customer satisfaction.

The consequence of our efforts is that more than 80% of our work comes through recommendation or existing customers returning to us again!

Our Accreditations

Throughout our business history, we have been delighted to receive several accreditations, awards and partnerships in our fields. We have installed many large projects for clients such as Winchester City Council, Peverel, RLHA, Grainger PLC and The Diocese of Winchester.

We have also become Which?, Checkatrade and FENSA approved for our services as we continue to provide our customers with high quality home improvement services and products.


No Pressure Promise

At KJM Windows & Conservatories, we pride ourselves on our no hassle, no pressure approach to providing high-quality home improvement products to the thousands of customers who have put their trust in us since 1982.

It is our experience that the last thing our customers want is a high-pressure sales person in their home, especially when they will not leave until they have ‘got the order’. Consequently, we at the KJM Group have a ‘No Pressure Promise’ to guarantee that if we are invited into your home, we will not employ any hard sell tactics and will leave immediately the moment anyone feels uncomfortable.

It’s the main reason that none of KJM’s sales staff are commission based. Most of our quotations require us to leave your property WITHOUT providing you with a quotation. You will be emailed or posted your full written quotation for you to peruse at your leisure. If you want to know more about our no pressure promise, don’t hesitate to contact us today.


Contact Us

We proudly offer various products and services for our customers and homeowners around Andover and Hampshire. If you want more information on our services or a quote, contact us today using our contact form, and we will endeavour to respond as soon as possible.

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