Company lists · Data refreshed September 2026

Top 25 Weatherization contractors based in the United Kingdom

Name: Weatherization contractors 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 468 companies tracked

RevenueBase identified 468 weatherization contractors headquartered in the United Kingdom as of September 2026 and tracks 3,160 professional contacts across them, including 881 with verified work emails. London is the largest hub.

This list covers weatherization contractors 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

468Companies

3,160Contacts tracked

881Verified emails

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The 25 largest weatherization contractors based in the United Kingdom

Ranked by team size

Top 25 of 468 weatherization contractors 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 weatherization contractors: 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	Correct Contract Services CCS	Partial evidence	Andover, United KingdomHQ checked Sep 19, 2026	201-500	108 contacts →
	Partial evidence “Correct Contract Services (CCS) is a trusted main contractor for compliance and energy services, expertly serving social housing landlords across the UK.” Source: RevenueBase Database · checked Sep 19, 2026
2	City Energy Network	Indirect evidence	Cardiff, United KingdomHQ checked Sep 19, 2026	51-200	98 contacts →
	Indirect evidence “At City Energy Network, we help households across the UK improve energy efficiency, cut bills, and reduce carbon emissions.” Source: RevenueBase Database · checked Sep 19, 2026
3	Purdy Part Of Sureserve	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	85 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 19, 2026
4	Next Energy	Indirect evidence	Knowsley, United KingdomHQ checked Sep 19, 2026	51-200	68 contacts →
	Indirect evidence “Established in 2016, we have grown to become one of the most reputable and reliable specialists within the renewable, heating, and insulation sectors in the United Kingdom.” Source: RevenueBase Database · checked Sep 19, 2026
5	ECO Approach	Indirect evidence	Beckenham, United KingdomHQ checked Sep 19, 2026	51-200	67 contacts →
	Indirect evidence “We’re a leading nationwide property services company established in 2013.” Source: RevenueBase Database · checked Sep 19, 2026
6	Scis Group	Indirect evidence	Fareham, United KingdomHQ checked Sep 19, 2026	51-200	60 contacts →
	Indirect evidence “Hello.” Source: RevenueBase Database · checked Sep 19, 2026
7	IZ Energy Services LTD	Indirect evidence	Barking, United KingdomHQ checked Sep 19, 2026	51-200	57 contacts →
	Indirect evidence “IZ Energy is pioneering a sustainable future.” Source: RevenueBase Database · checked Sep 19, 2026
8	Green Home Systems	Indirect evidence	Irvine, United KingdomHQ checked Sep 19, 2026	51-200	47 contacts →
	Indirect evidence “At Green Home Systems, we deliver whole-house retrofit solutions that make homes warmer, more energy efficient, and lower cost to run.” Source: RevenueBase Database · checked Sep 19, 2026
9	Sureserve Energy Services North	Indirect evidence	Brighouse, United KingdomHQ checked Sep 19, 2026	1,001-5,000	43 contacts →
	Indirect evidence “Sureserve Energy Services North is a leading national installer of insulation, heating solutions and renewable technologies.” Source: RevenueBase Database · checked Sep 19, 2026
10	Homelogic	Indirect evidence	Southampton, United KingdomHQ checked Sep 19, 2026	51-200	38 contacts →
	Indirect evidence “Homelogic®, based in Southampton, Hampshire, are an innovative, forward-thinking company dedicated to bringing eco-friendly, cost effective energy saving solutions to the homes…” Source: RevenueBase Database · checked Sep 19, 2026
11	Quora Group	Indirect evidence	North Shields, United KingdomHQ checked Sep 19, 2026	51-200	33 contacts →
	Indirect evidence “Professional service supplying, installing and maintaining energy efficient HVAC systems.” Source: RevenueBase Database · checked Sep 19, 2026
12	CWG Group LTD	Indirect evidence	Stevenage, United KingdomHQ checked Sep 19, 2026	11-50	32 contacts →
	Indirect evidence “CWG Group is your dedicated partner in creating energy-efficient, sustainable, and environmentally responsible solutions that stand the test of time.” Source: RevenueBase Database · checked Sep 19, 2026
13	Eclipse Energy	Indirect evidence	Halifax, United KingdomHQ checked Sep 19, 2026	11-50	27 contacts →
	Indirect evidence “Eclipse Energy are specialists in providing affordable and efficient ways to keep your home warm and dry for less.” Source: RevenueBase Database · checked Sep 19, 2026
14	ECO 247	Indirect evidence	St Asaph, United KingdomHQ checked Sep 19, 2026	51-200	25 contacts →
	Indirect evidence “At Eco 247, we are committed to building a greener future through sustainable energy solutions.” Source: RevenueBase Database · checked Sep 19, 2026
15	Green Improve	Indirect evidence	Blackburn, United KingdomHQ checked Sep 19, 2026	11-50	24 contacts →
	Indirect evidence “At Green Improve, we specialise in providing solutions for renewable heating and insulation installations.” Source: RevenueBase Database · checked Sep 19, 2026
16	Thrift Energy LTD	Indirect evidence	Gateshead, United KingdomHQ checked Sep 19, 2026	51-200	23 contacts →
	Indirect evidence “Thrift Energy is as a leading installer of Insulation, Heating, Electrical and Renewable Energy technologies.” Source: RevenueBase Database · checked Sep 19, 2026
17	Osborne Energy Limited	Partial evidence	Hastings, United KingdomHQ checked Sep 19, 2026	11-50	22 contacts →
	Partial evidence “Osborne Energy are a leading provider of energy services and projects in the UK, providing Main and Sub-Contractor services and delivering domestic and commercial retrofit and…” Source: RevenueBase Database · checked Sep 19, 2026
18	CT ECO Plus	Indirect evidence	Littlehampton, United KingdomHQ checked Sep 19, 2026	11-50	22 contacts →
	Indirect evidence “At CT Eco Plus, we deliver trusted, fully turnkey energy efficiency and retrofit solutions across the UK.” Source: RevenueBase Database · checked Sep 19, 2026
19	Aerocool LTD	Partial evidence	Burscough, United KingdomHQ checked Sep 19, 2026	11-50	21 contacts →
	Partial evidence “Established in 1989 Aerocool Limited has become one of the North West's best established air conditioning contractors.” Source: RevenueBase Database · checked Sep 19, 2026
20	Furbnow	Indirect evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “Furbnow is the complete solution for planning and delivering home energy projects.” Source: RevenueBase Database · checked Sep 19, 2026
21	ECO Systems Group LTD	Indirect evidence	Harold Wood, United KingdomHQ checked Sep 19, 2026	51-200	18 contacts →
	Indirect evidence “Eco Systems Group has been delivering high-quality insulation, retrofit, solar solutions & air source heat pumps across the commercial and residential sectors for over 13 years.” Source: RevenueBase Database · checked Sep 19, 2026
22	Elite Energy	Indirect evidence	Stockton-on-tees, United KingdomHQ checked Sep 19, 2026	51-200	18 contacts →
	Indirect evidence “Elite Energy – Powering a Greener, Smarter UK Elite Energy is an award-winning energy solutions company helping homeowners across the UK reduce energy bills, cut carbon emissions…” Source: RevenueBase Database · checked Sep 19, 2026
23	Jones Weatherproofing	Indirect evidence	Walsall, United KingdomHQ checked Sep 19, 2026	51-200	17 contacts →
	Indirect evidence “The globally trusted partner for weatherproofing solutions in construction.” Source: RevenueBase Database · checked Sep 19, 2026
24	RMS Energy Solutions	Indirect evidence	Coventry, United KingdomHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “Providing domestic energy efficiency solutions to save our customers money and save the environment.” Source: RevenueBase Database · checked Sep 19, 2026
25	Blue Cooling LTD	Partial evidence	Kendal, United KingdomHQ checked Sep 19, 2026	11-50	17 contacts →
	Partial evidence “Refrigeration and Air Conditioning Contractors Specialists in Service Installation and Maintenance of Refrigeration Systems.” 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: weatherization contractors. 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 weatherization contractors.
Partial evidence: Its own public description names part of weatherization contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name weatherization contractors. 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 468 weatherization contractors based in the United Kingdom

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Weatherization contractors based in the United Kingdom at a glance

As of Sep 19, 2026

27.9%Verified-email coverage

6.8Average contacts per company

11-50Median size (employees)

6.6%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

202

11-50

200

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 468 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 weatherization contractors, 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 “weatherization contractors”. 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 weatherization contractors), 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 weatherization contractors, 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, 881 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.

Weatherization contractors by metro

Weatherization contractors in London31

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 weatherization contractors, 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 weatherization contractors are there based in the United Kingdom?

RevenueBase identified 468 weatherization contractors 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?

Correct Contract Services CCS, headquartered in Andover, tops this list with the largest team on record.

Which city has the most weatherization contractors?

London leads with 31 headquartered companies, followed by Birmingham (12) and Glasgow (10).

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 881 verified decision-maker contacts tracked across these 468 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.