“I cannot praise Keymer Double Glazing highly enough, from initial survey, through to provision of a competitive quote and installation. Installation was first class - from starting the work when they said they would, the care taken over the installation, incredible tidiness and clear up and overall attitude and quality of the installers. I would highly recommend Keymer Double Glazing Ltd.”
Public evidence profile
Keymer Double Glazing Ltd
Credentials & registries
Which? Trusted Trader
Companies House
Active incorporated business
No Trust Score yet
- Rated 3.7 from 695 reviews across 2 review sources
- 1 credential shown
Newest review January 2025
Based on rating, review volume, independent sources and credential evidence. Evidence context, not a guarantee of workmanship.
Reviews · public evidence
What customers say
These reviews are published independently on the named public sources below, not testimonials this business chose to show. We bring them together and link each one back to where it appeared, so you can open the source and read it yourself.
3.7out of 5
Customers often mention
Where these reviews are published
- Checkatrade537 reviews · 3.3 avg
- Which? Trusted Traders158 reviews · 4.9 avg
Highlights
“Thank you Keymer for a fantastic job. We are thrilled. Shane was the icing on the cake. Such a nice guy. Very friendly, helpful, polite ... I can't praise him enouth. Nothing was too much for him.”
“The tradesmen turned up when they said they - Did a very good job - good finish and left no mess. Would thoroughly recommend them.”
Detailed reviews
These are the individual reviews we hold for Keymer Double Glazing Ltd, including the highlights above. The 695 headline total is the review volume reported across public review sources.
Their Surveyor accepted that failure of glazing was covered by warranty. 4 weeks later they said we would have to pay for replacement and it was not covered.
Prompt, professional and tidy.
Keymer Double Glazing installed 3x double glazed windows. The works were carried out on time and to budget. The two installers were very polite and helpful. I have nothing but praise for Keymer Double Glazing Ltd.
My review
The tradesmen turned up when they said they - Did a very good job - good finish and left no mess. Would thoroughly recommend them.
Excellent
All excellent.
Very good workmanship.
Replacing five windows.
Read the other 13 detailed reviews on this pageShow fewer reviews
Customer recommends this business
Good install of windows-doors
This was the second time we have used Keymer double glazing. They have done job jobs both times. The windows / doors look great, and they were not messy, and got it done in the day.
Work completed:
Scores listed by Which? Trusted Traders
- Customer Service
- 5 / 5
- Quality
- 5 / 5
- Value
- 4 / 5
Professional
Excellent from sales staff to fitting. No pressure, clean tidy work, prompt and professional.
Excellent service by all concerned
Replaced patio door and window.
Prompt and Professional
Fitted D/G unit (replacement). Prompt, tidy and friendly. We have used this company before and would use them again.
Good work
Fitted new composite back door. Made good all the mess from taking out rotten old door. Tidy, prompt, very pleased with result.
Excellent
installed bi-fold. Excellent and professional. Very good job.
Efficient and professional
Excellent service from my first enquiry to the fitted window.
No problems
No problems at all. Prompt, within budget and professional.
Prompt & professional
Professional assessment and quotation. Reasonable lead time and arrived exactly at planned time to complete work in good time. Tidy while working and cleaned up after, good workmanship resulted in pleasing new kitchen door.
Prompt & professional
The installers of the front door were excellent, efficient, clean workers. The company were very helpful. Good communication & the work carried out to budget.
Double glazed replacement door
They arrived on time, explained how they were going to do things and cleared up after themselves. Explained new lock / key mechanism happy cheerful lads.
High standard
I have used Keymer before and find their work of a high standard. On time, minimal disruption and cleaning up as they left. To be recommended.
Very satisfied
I am very satisfied with the work they did for me and the workman did a high standard of work. Friendly & very methodical & tidy. They are to be highly recommended.
From customer reviews
What customers consistently say
Recurring themes from 27 customer reviews across 2 review sources.
Customers mention transparent pricing: “from initial survey, through to provision of a competitive quote and installation.” · Checkatrade, 15 Jan 2025
Respectful and tidy in your home: “Made good all the mess from taking out rotten old door. Tidy, prompt, very pleased with result.” · Which? Trusted Traders, 29 Nov 2018
“Installation was first class - from starting the work when they said they would” · Checkatrade, 15 Jan 2025
“The works were carried out on time and to budget.” · Which? Trusted Traders, 2 Mar 2020
“The tradesmen turned up when they said they” · Which? Trusted Traders, 17 Jan 2020
“Excellent from sales staff to fitting. No pressure, clean tidy work, prompt and professional.” · Which? Trusted Traders, 20 Feb 2019
“The company were very helpful. Good communication & the work carried out to budget.” · Which? Trusted Traders, 1 Nov 2018
“Good communication from start. New front door & frame fitted.” · Which? Trusted Traders, 4 Oct 2018
“The works were carried out on time and to budget. The two installers were very polite and helpful. I have nothing but praise for Keymer Double Glazing Ltd.” · Which? Trusted Traders, 2 Mar 2020
“Did a very good job - good finish and left no mess.” · Which? Trusted Traders, 17 Jan 2020
Credentials and associations
1Credentials and memberships
These credentials and memberships are attributed to named public sources. Check the source before relying on them.
- Source checked
- 25 Jun 2026
Companies House registration
ActiveActive incorporated business
Keymer Double Glazing Ltd is linked to a Companies House entry. This shows the business registration, not evidence of workmanship or service quality.
Legal nameKeymer Double Glazing Ltd
Company number02603874
Incorporated
Official checkOn the public register
Why this helps you judge trust: this trader is linked to a registered company with named people who are legally accountable for it, on an official register anyone can check, a layer of accountability an unregistered trader doesn't offer. Around 35 years on the register also points to an established business rather than a brand-new one.
Source-listed gallery
9 photosPhotos listed on Which? Trusted Traders
These sources do not label every image as completed work. The gallery may include projects, people, logos or certificates, so it does not count as completed-work evidence.
uPVC Windows
Aluminium Doors and Windows. Roof Lantern
Chartwell Green Composite Door
Aluminium Windows
Fascias, Soffits & Cladding
Orangery with Grey Aluminium Patio Doors and an Aluminium Roof Lantern Interior
Orangery Aluminium Bi-Fold Doors
From Which? Trusted Traders
Opening hours
The hours this business publishes online, handy for knowing when to call. Confirm before you set off.
- Monday–Friday
- 9am–5:30pm
- Saturday
- 9am–5pm
Sources
2 named public sourcesWhere this information comes from
Everything on this page is drawn from named public sources. Where a source provides a public link, you can open the original and dig deeper.
Check dates vary by source. Where we hold a date, the check shows it.
About
In Burgess Hill, West Sussex.
Services they list
Double glazing installationDouble glazing suppliersDouble glazing repairsConservatory repairsBi-fold doorsPatio doorsTimber doorsFire doorsFront doorFrench doorsUPVC doorsComposite doors
Listed on public sources or the business's own website; check directly that they cover your job before you book.
Areas served
Burgess HillWest Sussex
The areas they list covering on a public directory; confirm they cover your address before you book.
What this business says about itself
From their own website
What this business says about itself
See their work: Instagram (opens in new tab) · Facebook (opens in new tab)
- Experience they state: years of experience
- Areas served: Mid-Sussex
- Good to know: Free quotes
- VAT number they state: GB 620897623 · check on the HMRC VAT checker (opens in new tab)
Accreditations it displays. Confirm each is current on the official register before you hire:
- Which? Trusted Trader · verify (opens in new tab) · we hold this registration
- Checkatrade · verify (opens in new tab)
- FENSA · verify (opens in new tab)
These are statements the business makes on its own website, worth confirming in writing (and on the official registers) before you hire, not independently verified by us.
Independent checks
About this business
How long they've really been tradingThe earliest independent record of them trading is 1991, so at least 35 years. They appear in 2 separate independent sources.
Company registered1991First public review2018
Your own checks
What to check before you hire
Worth checking yourself
Always confirm credentials and quotes with the business directly before hiring.
Be wary of high-pressure 'today-only' discounts and a salesperson who won't leave. A reputable window or door firm gives you a written, itemised quote you can take away and compare against others.
Never pay the full price up front; a modest deposit with the balance on completion is normal. Ask what deposit protection or insurance-backed guarantee you get if the firm stops trading before fitting.
Get the specification in writing (frame material, the glazing units and their energy rating, and any trickle vents) so you can check you got what you paid for.
Want an extra legitimacy check? Run the Cowboy Checker on Keymer Double Glazing Ltd before you contact them.
Run Cowboy Checker →Good to know
Common questions about Keymer Double Glazing Ltd
Is Keymer Double Glazing Ltd a legitimate business?
As of 8 Aug 2026, we hold 695 independent reviews across Checkatrade and Which? Trusted Traders for this business, and Companies House lists (no. 02603874) as active, checked 31 Jul 2026. This is independent public evidence, not a guarantee of workmanship. If anything here is out of date, the business can request a correction.
What do customers say about Keymer Double Glazing Ltd?
Keymer Double Glazing Ltd has 695 public reviews, averaging 3.7 out of 5, gathered across 2 review sources. You can read the individual reviews and where each came from in the reviews section above.
How do I know Keymer Double Glazing Ltd's reviews are genuine?
Keymer Double Glazing Ltd's 695 public reviews are gathered and cross-checked across 2 review sources. Reviews spread across several review sources are harder to fake than a single polished page. MyTrustedTraders brings this public evidence together with no ads and no paid placement: we show where every review came from rather than selling rankings, so you can weigh the evidence for yourself.
Is Keymer Double Glazing Ltd qualified and accredited?
We hold 1 independently sourced credential for Keymer Double Glazing Ltd, including Which? Trusted Trader. Each is attributed to the body that issued it in the credentials section. For example, Which? Trusted Trader is Which? Trusted Trader: an endorsement from the consumer champion Which?, given to traders who pass its assessment process.
Is Keymer Double Glazing Ltd a registered business?
Keymer Double Glazing Ltd is a registered business on Companies House (company number 02603874), incorporated 22 Apr 1991, listed as active. This confirms the legal registration of the business, not evidence of workmanship or service quality.
What does Keymer Double Glazing Ltd specialise in?
Keymer Double Glazing Ltd lists specialist services including Double glazing installation, Double glazing suppliers, Double glazing repairs, Conservatory repairs, Bi-fold doors, Patio doors. If your job is one of these, look for it in their listed services or ask them to confirm for your project.
What areas does Keymer Double Glazing Ltd cover?
They state on their own website that they cover Mid-Sussex. This is the business's own statement on their website, not something we have independently checked. Confirm they cover your postcode before booking.
How long has Keymer Double Glazing Ltd been trading?
Keymer Double Glazing Ltd has been reviewed on public sources since 2018.