Company lists · Data refreshed October 2026

Top 25 Energy audit and efficiency companies based in the United Kingdom

Name: Energy audit and efficiency companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 394 companies tracked

RevenueBase identified 394 company matches for energy audit and efficiency companies associated with the United Kingdom as of October 2026 and tracks 12,351 professional contacts across them, including 3,735 with verified work emails. London is the largest hub.

This list covers company matches for energy audit and efficiency companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 12, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 12, 2026 How this list was built

394Companies

12,351Contacts tracked

3,735Verified emails

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The 25 largest energy audit and efficiency companies based in the United Kingdom

Ranked by team size

Top 25 of 394 company matches for energy audit and efficiency companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	British GAS	Exact match	Windsor, United KingdomHQ recorded Oct 12, 2026	10001+	9,535 contacts →
	Exact match “Taking care of things.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	CFP Energy	Exact match	London, United KingdomHQ recorded Oct 12, 2026	201-500	173 contacts →
	Exact match “CFP Energy is a leading provider of energy and environmental solutions for industrial and commercial clients.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3	TROO	Exact match	Doxford International Business Park, United KingdomHQ recorded Oct 12, 2026	51-200	112 contacts →
	Exact match “Managing business energy can be overwhelming.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	Laser Energy	Exact match	West Malling, United KingdomHQ recorded Oct 12, 2026	51-200	88 contacts →
	Exact match “At LASER Energy, part of the Commercial Services Group Energy & Environment portfolio, a wholly-owned business unit of Kent County Council, we help public sector organisations…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	AMBER	Exact match	Cardiff, United KingdomHQ recorded Oct 12, 2026	51-200	70 contacts →
	Exact match “We are an award-winning energy consultancy and certified B Corp™.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	ECO Logic Partners	Exact match	Team Valley, United KingdomHQ recorded Oct 12, 2026	11-50	63 contacts →
	Exact match “We bring good energy to the table to help you save yours.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	ECBS	Exact match	Hebburn, United KingdomHQ recorded Oct 12, 2026	51-200	54 contacts →
	Exact match “At ECBS we specialise in working with customers to significantly reduce their business utility costs and make the necessary steps towards a greener future.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	Cotswold Energy Group	Exact match	Stonehouse, United KingdomHQ recorded Oct 12, 2026	51-200	47 contacts →
	Exact match “Secure your greener future with renewable energy solutions!” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	Cotopaxi LTD	Exact match	White Moss Business Park, United KingdomHQ recorded Oct 12, 2026	11-50	47 contacts →
	Exact match “Cotopaxi Energy is an independent engineering consultancy specialising in utility and carbon reduction.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	Fusion For Business	Exact match	Durham, United KingdomHQ recorded Oct 12, 2026	51-200	44 contacts →
	Exact match “At Fusion For Business, we believe in the value of genuine human connection - people doing business with people they trust.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	Everun	Exact match	Belfast, United KingdomHQ recorded Oct 12, 2026	11-50	42 contacts →
	Exact match “As the world is becoming much more energy conscious, businesses everywhere are turning to more sustainable models of energy usage.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	Brownlow Utilities	Exact match	Newton-le-willows., United KingdomHQ recorded Oct 12, 2026	11-50	41 contacts →
	Exact match “Brownlow Utilities - the energy and sustainability expert!” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	Cenergist	Exact match	Washington, United KingdomHQ recorded Oct 12, 2026	201-500	40 contacts →
	Exact match “Cenergist is a specialist energy and water efficiency company in the UK and Europe.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	Emissis	Exact match	Stokesley, United KingdomHQ recorded Oct 12, 2026	51-200	29 contacts →
	Exact match “Engineering energy efficiency that pays off.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	Greener Solutions Group LTD	Exact match	North Shields, United KingdomHQ recorded Oct 12, 2026	11-50	23 contacts →
	Exact match “Greener Solutions Group is a PAS 2035 retrofit and energy efficiency contractor delivering for housing associations, ALMOs, local authorities and main contractors across the UK.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	001 Limited	Exact match	St Albans, United KingdomHQ recorded Oct 12, 2026	11-50	23 contacts →
	Exact match “001 are commercial energy and utility consultants.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	PRO Enviro LTD Certified B Corp	Exact match	Rugby, United KingdomHQ recorded Oct 12, 2026	11-50	20 contacts →
	Exact match “Pro Enviro is a specialist energy engineering and process optimisation consultancy, with over 30 years’ experience working with manufacturing and other business clients.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	Energy & Technical Services LTD	Exact match	Bristol, United KingdomHQ recorded Oct 12, 2026	11-50	20 contacts →
	Exact match “Energy and Technical Services is an expert in energy consulting and service and has been for 25th years.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	Making Energy Greener	Exact match	Southport, United KingdomHQ recorded Oct 12, 2026	51-200	18 contacts →
	Exact match “With over 20 years of experience in the energy services sector, Making Energy Greener are committed to transforming our community's homes with innovative energy-saving products…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Energy Gain UK	Exact match	Trafford Park, United KingdomHQ recorded Oct 12, 2026	11-50	17 contacts →
	Exact match “Energy Gain UK consults, designs, executes, maintains and arranges funding for energy efficiency projects within the UK and global marketplace.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	Kestrix	Exact match	London, United KingdomHQ recorded Oct 12, 2026	11-50	17 contacts →
	Exact match “Kestrix uses thermal imaging and AI to map and quantify how heat escapes from buildings, assess heat pump and solar readiness, and generate energy retrofit plans – for more…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	Experienced Energy Solutions	Exact match	Tamworth, United KingdomHQ recorded Oct 12, 2026	11-50	15 contacts →
	Exact match “Experienced Energy Solutions is an independent energy and sustainability partner helping UK businesses take control of their energy costs, consumption, contracts and long-term…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23	Maximeyes UK LTD	Exact match	Sutton, United KingdomHQ recorded Oct 12, 2026	11-50	15 contacts →
	Exact match “Award-winning energy consultancy to help you reducing your costs with simple solutions for Business Utilities” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	EEC Energy Efficiency Consultants	Exact match	Coventry, United KingdomHQ recorded Oct 12, 2026	11-50	14 contacts →
	Exact match “With over 14 years’ working in the industry, EEC has a proven track record that has established the business as one of the UK's leading Energy Assessment provider.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25	Decerna	Exact match	Cramlington, United KingdomHQ recorded Oct 12, 2026	11-50	14 contacts →
	Exact match “Decerna is a specialist commercial sustainability consultancy.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “energy audit and efficiency companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 394 energy audit and efficiency companies based in the United Kingdom

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Energy audit and efficiency companies based in the United Kingdom at a glance

As of Oct 12, 2026

30.2%Verified-email coverage

31.3Average contacts per company

1-10Median size (employees)

12.2%Largest-city concentration · London

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

255

11-50

107

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 394 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “energy audit and efficiency companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,735 professional contacts with verified work emails across the full matched dataset. 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 October 12, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Energy audit and efficiency companies by metro

Energy audit and efficiency companies in London48

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “energy audit and efficiency companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy audit and efficiency companies are there based in the United Kingdom?

RevenueBase identified 394 company matches for energy audit and efficiency companies associated with the United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

British GAS tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most energy audit and efficiency companies?

London leads with 48 company records, followed by Manchester (10) and Nottingham (9).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,735 professional contacts with verified work emails tracked across these 394 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 12, 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 SmartSearch, 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.