Timber - PVC - Aluminium - Windows, Doors & Conservatories in Dorset

Why you should choose KJM in a crowded market-place?

Why Local Trust Beats National Hype: Choose KJM for Windows & Doors in Andover & Hampshire

When you’re investing in new double or triple glazing, you don’t need national hype—you need a proven local installer that will still be here in 10 years.

KJM Windows & Conservatories has traded continuously since the early 1980s and is built on simple principles: do the job right, treat people fairly, and stand behind every installation.

1) 40+ years of trading = real peace of mind

Stability matters with products designed to last decades. KJM has delivered thousands of installations across Andover and Hampshire since the early 1980s and remains proudly independent and locally accountable.

2) Customers rate us near-perfect—across the platforms that matter

Independent review sites consistently place KJM at the top: Ratings recorded on 1/11/2025

Which? Trusted Traders: 4.9/5 (83 reviews) with 100% recommending us; subscores Customer Service 4.9, Quality 5.0, Value 4.9. KJM Group
Google: 4.9/5 from ~259 reviews. KJM Group
Checkatrade: 9.87/10 across ~367 reviews; member since 2008 (12-month subscores: Quality 9.83, Reliability 9.92, Communication 9.90). KJM Group

Real feedback mentions no pushy sales, tidy installations, and clear communication, which is exactly how we operate.

3) Quality you can control: employed installers, not random subs

We use trained, directly employed fitters—some with decades at KJM—so you get consistent workmanship and respectful teams in your home. (No revolving-door subcontracting, no excuses.)

4) Verified standards, not just claims

Which? Trusted Trader verified
GGF member with industry codes of practice
Trading Standards Approved
Trustmark registered
Award recognition including G-Awards finalist and Inspire Business Award
No-Pressure Promise: consider your quote in your own time—no in-home hard sell.

5) Local service, national-level product choice

From high-performance windows and doors to conservatories and replacement roofs, we pair the right product to the property—not the other way round.

Thinking about windows, doors, or a glazed extension?
Get straight advice and a no-pressure quote from a long-standing local team.

Call 01264 359355 or Request a Quote.

FAQs about choosing a window installer in Hampshire

Do you sub-contract installations?

No—KJM uses trained, employed installers for consistent quality and accountability

How long has KJM been trading?

We’ve traded continuously since the early 1980s—more than 40 years.

Do you use high-pressure sales tactics?

No. Our No-Pressure Promise means you can review your quote in your own time.

What do customers say about KJM?

Near-perfect scores across Which?, Google and Checkatrade, with 100% recommendation on Which? Trusted Traders.

Are you independently verified?

Yes—Which? Trusted Traders, GGF membership, and multiple award recognitions.

About
Latest Posts

Mark Pearce

With over four decades in the glazing industry, Mark Pearce has been at the heart of KJM Windows & Conservatories since 1983. Starting as a building labourer, he quickly rose through the ranks, working as a window and door installer from 1984, a factory operator manufacturing windows later that year, factory manager in 1992, and joining the sales team in 1994. Becoming a Director in 2002, and finally, the sole owner in 2010, Mark Pearce is truly a double glazing expert and has led KJM to become a leading supplier of high-quality windows, doors, and conservatories across Andover and the South of England.

Mark Pearce is a highly experienced specialist in the double glazing industry, having built his knowledge from the ground up through hands-on experience in installation, manufacturing, sales, and business management. Beyond his role at KJM, Mark is a keen blogger, writer, and traveller, often sharing insights on the latest innovations in the home improvement industry.