Company lists · Data refreshed September 2026

Top 25 Door and window installers based in the United Kingdom

Name: Door and window installers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 968 companies tracked

RevenueBase identified 968 door and window installers headquartered in the United Kingdom as of September 2026 and tracks 4,699 professional contacts across them, including 1,219 with verified work emails. London is the largest hub.

This list covers door and window installers headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

968Companies

4,699Contacts tracked

1,219Verified emails

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The 25 largest door and window installers based in the United Kingdom

Ranked by team size

Top 25 of 968 door and window installers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to door and window installers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	First Home Improvements	Indirect evidence	Norwich, United KingdomHQ checked Sep 19, 2026	201-500	248 contacts →
	Indirect evidence “First Home Improvements traces its roots to the 1970's and prides itself on installing highly innovative A rated energy saving products unrivaled by many others within our…” Source: RevenueBase Database · checked Sep 19, 2026
2	Nationwide Windows And Doors	Strong evidence	Rugby, United KingdomHQ checked Sep 19, 2026	501-1,000	126 contacts →
	Strong evidence “Manufacturers and Installers of PVCu Windows and Doors,Composite and Fire Doors and Conservatories to the Retail, Trade and Commercial Sector.” Source: RevenueBase Database · checked Sep 19, 2026
3	Emplas Window Systems	Strong evidence	Wellingborough, United KingdomHQ checked Sep 19, 2026	201-500	117 contacts →
	Strong evidence “Emplas is the window and door fabricator of choice, offering a complete range of premium-quality, high-security, energy-efficient windows and doors for the trade installer, new…” Source: RevenueBase Database · checked Sep 19, 2026
4	KAT UK Macclesfield	Strong evidence	Macclesfield, United KingdomHQ checked Sep 19, 2026	51-200	82 contacts →
	Strong evidence “KAT UK is a Macclesfield based manufacturer of specialist glazing products, including Aluminium and PVCu bifold doors, sliding patio doors, entrance doors, French doors, windows…” Source: RevenueBase Database · checked Sep 19, 2026
5	MGS	Partial evidence	Kingswinford, United KingdomHQ checked Sep 19, 2026	11-50	73 contacts →
	Partial evidence “MGS are a Different Type of Door Company.” Source: RevenueBase Database · checked Sep 19, 2026
6	Unique Window Systems LTD	Strong evidence	Leicester, United KingdomHQ checked Sep 19, 2026	201-500	71 contacts →
	Strong evidence “An award-winning designer, fabricator and installer of UPVC and aluminium windows, doors and curtain walling, Unique Window Systems Ltd specialises in the supply of quality…” Source: RevenueBase Database · checked Sep 19, 2026
7	Polyframe	Strong evidence	Lenwade, United KingdomHQ checked Sep 19, 2026	201-500	66 contacts →
	Strong evidence “Polyframe are a multi award-winning manufacturer of high quality windows, doors and conservatories.” Source: RevenueBase Database · checked Sep 19, 2026
8	Glazerite UK Group LTD	Partial evidence	Wellingborough, United KingdomHQ checked Sep 19, 2026	201-500	61 contacts →
	Partial evidence “Glazerite UK Group is a leading trade fabricator offering installers access to one of the most comprehensive product ranges in the industry.” Source: RevenueBase Database · checked Sep 19, 2026
9	JPJ Installations LTD	Strong evidence	Braintree, United KingdomHQ checked Sep 19, 2026	51-200	57 contacts →
	Strong evidence “JPJ Installations Ltd are specialists in Aluminium Glazing Systems including Curtain Wall, Framing, Door and Window Systems.” Source: RevenueBase Database · checked Sep 19, 2026
10	Express Bi-Folding Doors	Strong evidence	Leeds, United KingdomHQ checked Sep 19, 2026	201-500	56 contacts →
	Strong evidence “Express Bi Folding Doors are the UK's leading manufacturer & installer of bespoke aluminium products.” Source: RevenueBase Database · checked Sep 19, 2026
11	CWG Choices Limited	Strong evidence	Corby, United KingdomHQ checked Sep 19, 2026	201-500	50 contacts →
	Strong evidence “CWG Choices Ltd is a double glazing supplier of windows, doors, conservatories and garden studios/offices.” Source: RevenueBase Database · checked Sep 19, 2026
12	Solidor	Partial evidence	Stoke-on-trent, United KingdomHQ checked Sep 19, 2026	51-200	48 contacts →
	Partial evidence “Born in 2004, Solidor has firmly established itself as the nation’s favourite manufacturer and supplier of composite doors.” Source: RevenueBase Database · checked Sep 19, 2026
13	Crystal Windows And Doors LTD	Strong evidence	Romford, United KingdomHQ checked Sep 19, 2026	201-500	43 contacts →
	Strong evidence “Crystal® was started in 1995 to offer a fair and honest service to customers wanting replacement windows and doors.” Source: RevenueBase Database · checked Sep 19, 2026
14	Sovereign Group LTD	Strong evidence	Nelson, United KingdomHQ checked Sep 19, 2026	201-500	42 contacts →
	Strong evidence “Sovereign Group are manufactures and installers of UPVC windows and doors, aluminium windows, doors and composite doors.” Source: RevenueBase Database · checked Sep 19, 2026
15	Hazlemere Group	Partial evidence	High Wycombe, United KingdomHQ checked Sep 19, 2026	51-200	39 contacts →
	Partial evidence “Hazlemere is a family owned and run double glazing manufacturer and installer based in High Wycombe, Buckinghamshire.” Source: RevenueBase Database · checked Sep 19, 2026
16	Dekko Window Systems LTD	Partial evidence	Ashton-under-lyne, United KingdomHQ checked Sep 19, 2026	51-200	36 contacts →
	Partial evidence “DEKKO WINDOW SYSTEMS LIMITED Manufacturers of a wide range of glazing products for professional installation companies.” Source: RevenueBase Database · checked Sep 19, 2026
17	Sevenday Windows	Strong evidence	Lenwade Norwich, United KingdomHQ checked Sep 19, 2026	51-200	30 contacts →
	Strong evidence “Sevenday Windows is a nationwide network of trade counters serving the professional installer, builder and general home improver.” Source: RevenueBase Database · checked Sep 19, 2026
18	APW Glazing Limited	Strong evidence	Cannock, United KingdomHQ checked Sep 19, 2026	11-50	30 contacts →
	Strong evidence “Expert Facade & Window Installers Accredited to major composite window manufactures standards, we help developers deliver the extraordinary through our expertise, professionalism…” Source: RevenueBase Database · checked Sep 19, 2026
19	Everglade Windows LTD	Partial evidence	Greenford, United KingdomHQ checked Sep 19, 2026	51-200	27 contacts →
	Partial evidence “At Everglade Windows, we are devoted to progressive thinking and pushing boundaries.” Source: RevenueBase Database · checked Sep 19, 2026
20	Camel Glass & Joinery LTD Camel Group	Strong evidence	Wadebridge, United KingdomHQ checked Sep 19, 2026	51-200	27 contacts →
	Strong evidence “Camel Glass & Joinery Ltd \| Award-Winning Glazing Specialists A Cornwall company since 1983, Camel Glass & Joinery Ltd is an award-winning installer delivering premium windows…” Source: RevenueBase Database · checked Sep 19, 2026
21	Industrial Door Systems	Partial evidence	Stretford, United KingdomHQ checked Sep 19, 2026	201-500	27 contacts →
	Partial evidence “Industrial Door Systems Limited has established itself as a prominent name in the UK industrial door industry since its inception in 1986.” Source: RevenueBase Database · checked Sep 19, 2026
22	Chigwell Window Centre PLC	Strong evidence	Forest Rd, United KingdomHQ checked Sep 19, 2026	51-200	27 contacts →
	Strong evidence “Established in 1996, Chigwell Window Centre PLC (part of Chigwell Group PLC) manufactures, supplies and installs aluminium and uPVC doors and windows for domestic, commercial and…” Source: RevenueBase Database · checked Sep 19, 2026
23	Select Windows Home Improvements Limited	Strong evidence	Walsall, United KingdomHQ checked Sep 19, 2026	51-200	26 contacts →
	Strong evidence “Manufacturers and Installers of PVCu windows and doors, patios, bifold plus, composite doors and fire doors from our central location delivery throughout the UK.” Source: RevenueBase Database · checked Sep 19, 2026
24	Britannia Windows	Partial evidence	Clevedon, United KingdomHQ checked Sep 19, 2026	51-200	24 contacts →
	Partial evidence “Britannia Windows started as a family business and remains in the family to this day.” Source: RevenueBase Database · checked Sep 19, 2026
25	Futuremost Limited	Strong evidence	Portsmouth, United KingdomHQ checked Sep 19, 2026	11-50	22 contacts →
	Strong evidence “Manufacturers and installers of aluminium and uPVC windows, doors, shop fronts and screens.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: door and window installers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names door and window installers.
Partial evidence: Its own public description names part of door and window installers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name door and window installers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 968 door and window installers based in the United Kingdom

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Door and window installers based in the United Kingdom at a glance

As of Sep 19, 2026

25.9%Verified-email coverage

4.9Average contacts per company

1-10Median size (employees)

6.0%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

554

11-50

302

51-200

201-500

501-1,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 968 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among door and window installers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “door and window installers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names door and window installers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among door and window installers, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 1,219 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Door and window installers by metro

Door and window installers in London58

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names door and window installers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many door and window installers are there based in the United Kingdom?

RevenueBase identified 968 door and window installers headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

First Home Improvements, headquartered in Norwich, tops this list with the largest team on record.

Which city has the most door and window installers?

London leads with 58 headquartered companies, followed by Leicester (13) and Norwich (13).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,219 verified decision-maker contacts tracked across these 968 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.