Company lists · Data refreshed September 2026

Top 25 Renewable energy consulting firms based in the United Kingdom

Name: Renewable energy consulting firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 1,487 companies tracked

RevenueBase identified 1,487 renewable energy consulting firms headquartered in the United Kingdom as of September 2026 and tracks 44,050 professional contacts across them, including 14,984 with verified work emails and 4,796 with mobile numbers. London is the largest hub.

This list covers renewable energy consulting firms 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

1,487Companies

44,050Contacts tracked

14,984Verified emails

4,796Mobile numbers

Explore all 1,487 companies → Free signup · no credit card · 500 free credits

The 25 largest renewable energy consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 1,487 renewable energy consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names renewable energy consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	WOODStrong evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	10001+	26,949
	“Wood is a global leader in consulting and engineering, delivering critical solutions across energy and materials markets.” Source: company website · checked Sep 5, 2026
2	PenspenPartial evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,007
	“Penspen designs, maintains, and optimises energy infrastructure to improve access to secure and sustainable energy for communities worldwide.” Source: company website · checked Sep 5, 2026
3	Dalcour MaclarenIndirect evidence	Chesterton, United KingdomHQ checked Sep 5, 2026	501-1,000	589
	“Dalcour Maclaren: delivering land, stakeholder and environmental solutions.” Source: company website · checked Sep 5, 2026
4	Natural PowerStrong evidence	Castle Douglas, United KingdomHQ checked Sep 5, 2026	501-1,000	500
	“Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Source: company website · checked Sep 5, 2026
5	Fichtner Consulting Engineers LTDIndirect evidence	Stockport, United KingdomHQ checked Sep 5, 2026	51-200	418
	“Fichtner is one of the world's leading independent engineering consultancy firms.” Source: company website · checked Sep 5, 2026
6	Cubico Sustainable InvestmentsStrong evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	406
	“Cubico Sustainable Investments is one of the world’s largest privately-owned renewable energy companies, leveraging our strong local presence with a unique combination of in-house…” Source: company website · checked Sep 5, 2026
7	GenesisPartial evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	401
	“Genesis is a market-leading advisory company focused on providing high-value technical and advisory services for the energy industry.” Source: company website · checked Sep 5, 2026
8	EIC PartnershipPartial evidence	Redditch, United KingdomHQ checked Sep 5, 2026	51-200	316
	“EIC Partnership: A Legacy of Expertise, A Commitment to Sustainability With origins dating back to 1975, EIC has cultivated nearly 50 years of distinguished service in energy and…” Source: company website · checked Sep 5, 2026
9	Intec Energy SolutionsPartial evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	242
	“INTEC Energy Solutions delivers best-in-class services in Engineering, Procurement, Construction (EPC), Battery Energy Storage Systems (BESS), Manufacturing, Project Development…” Source: company website · checked Sep 5, 2026
10	Ethical PowerIndirect evidence	Exeter, United KingdomHQ checked Sep 5, 2026	51-200	231
	“Ethical Power Group launched in the UK in 2010.” Source: company website · checked Sep 5, 2026
11	OWCStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	185
	“The Renewable Energy Consultants.” Source: company website · checked Sep 5, 2026
12	Wood ThilstedStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	175
	“Wood Thilsted is a world-leading renewable energy engineering consultancy experienced and specialised in offshore wind.” Source: company website · checked Sep 5, 2026
13	CFP EnergyPartial evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	171
	“CFP Energy is a leading provider of energy and environmental solutions for industrial and commercial clients.” Source: company website · checked Sep 5, 2026
14	Consultiv UtilitiesStrong evidence	Hebburn, United KingdomHQ checked Sep 5, 2026	201-500	159
	“At Consultiv Utilities, we help organisations to take control of their energy strategy and support them in navigating the complexities of energy, with confidence.” Source: company website · checked Sep 5, 2026
15	Taylor Hopkinson Powered By BrunelIndirect evidence	Glasgow, United KingdomHQ checked Sep 5, 2026	51-200	159
	“You'd be forgiven for thinking there's nothing normal about Taylor Hopkinson.” Source: company website · checked Sep 5, 2026
16	The Sirius GroupIndirect evidence	Durham, United KingdomHQ checked Sep 5, 2026	201-500	156
	“End to End Service: From initial investigations and assessments to planning, design and engineering support, we give you a foundation of confidence for your site development…” Source: company website · checked Sep 5, 2026
17	Octopus Energy GenerationPartial evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	153
	“At Octopus Energy Generation, we’re building green power for the future, from large-scale solar to onshore and offshore wind, and innovative initiatives like the Fan Club.” Source: company website · checked Sep 5, 2026
18	TNEIPartial evidence	Manchester, United KingdomHQ checked Sep 5, 2026	51-200	150
	“TNEI is an independent specialist energy consultancy providing technical, strategic, environmental and consenting advice to organisations operating within the conventional and…” Source: company website · checked Sep 5, 2026
19	British Solar RenewablesPartial evidence	Shepton Mallet, United KingdomHQ checked Sep 5, 2026	51-200	148
	“Clean energy, powered with purpose.” Source: company website · checked Sep 5, 2026
20	RHIPartial evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	201-500	145
	“rhi is a professional services consultancy working with clients on some of the world’s largest and most complex projects in the energy and infrastructure sectors.” Source: company website · checked Sep 5, 2026
21	JD Ross EnergyStrong evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	143
	“JD Ross Energy is an international talent consultancy that solely focuses on the Renewable Energy sector, connecting the best talent across the globe with companies that are…” Source: company website · checked Sep 5, 2026
22	LCP DeltaPartial evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	137
	“We help our clients to invest in and navigate the energy transition.” Source: company website · checked Sep 5, 2026
23	ConsultusStrong evidence	Leicester, United KingdomHQ checked Sep 5, 2026	51-200	129
	“Recognised as the Consultancy of the Year in 2021 by Energy Live News, Consultus delivers world-class consulting, buying and management services for Business Energy and Business…” Source: company website · checked Sep 5, 2026
24	AMBERPartial evidence	Cardiff, United KingdomHQ checked Sep 5, 2026	51-200	124
	“We are an award-winning energy consultancy and certified B Corp™.” Source: company website · checked Sep 5, 2026
25	Longevity PartnersPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	115
	“Longevity Partners is a multidisciplinary energy and sustainability consultancy.” Source: company website · checked Sep 5, 2026

Showing 25 of 1,487 renewable energy consulting firms based in the United Kingdom

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Renewable energy consulting firms based in the United Kingdom at a glance

As of Sep 5, 2026

1-10Median size (employees)

LondonLargest hub · 329 HQs

4,796Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

919

11-50

435

51-200

201-500

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

13,752

31–60

913

61–90

90–180

180+

310

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 renewable energy consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “renewable energy consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among renewable energy consulting firms, 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 an evidence 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, 14,984 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 5, 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.

Renewable energy consulting firms by metro

Frequently asked

How many renewable energy consulting firms are there based in the United Kingdom?

RevenueBase identified 1,487 renewable energy consulting firms 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?

WOOD, headquartered in Aberdeen, tops this list with the largest team on record.

Which city has the most renewable energy consulting firms?

London leads with 329 headquartered companies, followed by Manchester (38) and Glasgow (32).

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 14,984 verified decision-maker contacts tracked across these 1,487 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 5, 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.