Company lists · Data verified August 2026

Top 25 Climate consulting firms based in the United Kingdom

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,364 companies tracked

There are 1,364 climate consulting firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 58,721 professional contacts across them, including 27,876 with verified work emails and 7,928 with mobile numbers. London is the largest hub.

This list covers climate 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. Data current as of August 28, 2026.

1,364Companies

58,721Contacts tracked

27,876Verified emails

7,928Mobile numbers

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The 25 largest climate consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 1,364 climate consulting firms based in the United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Arcadis	Croydon	10001+	33,933	16,114
2	JBA Consulting	Skipton	501-1,000	717	525
3	Ricardo PLC	London	1,001-5,000	680	290
4	E CO	London	n/a	623	49
5	ADP Consulting	London	201-500	463	270
6	Fichtner Consulting Engineers LTD	Glasgow	51-200	418	112
7	Inspired PLC	Kirkham	501-1,000	374	261
8	Hydrock, NOW Stantec	Hale	501-1,000	357	156
9	EIC Partnership	Redditch	51-200	315	56
10	H&z Management Consulting	London	501-1,000	287	153
11	Wardell Armstrong LLP Part Of SLR	Edinburgh	501-1,000	253	131
12	Avantis	London	501-1,000	206	68
13	Landell Mills	Trowbridge	51-200	196	53
14	CFP Energy	London	201-500	177	95
15	Pegasys Consulting	London	51-200	170	98
16	RSK Biocensus	Leeds	201-500	164	119
17	Aqua Consultants	Birmingham	51-200	163	99
18	Arthian LTD	Anglesey	201-500	152	105
19	Evora Global	London	51-200	149	120
20	Consultus	Rochford	51-200	127	106
21	AMBER	Cardiff	51-200	123	87
22	Middlemarch	Southampton	51-200	118	70
23	ARUP	Solihull	501-1,000	96	27
24	3keel	Oxford	51-200	93	65
25	AES Sustainability Consultants	Tiverton	51-200	91	70

Showing 25 of 1,364 climate consulting firms based in the United Kingdom

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Climate consulting firms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 463 HQs

7,928Contacts with mobile numbers

131Emails re-verified in last 30 days

Companies by employee count

1-10

967

11-50

281

51-200

201-500

501-1,000

1,001-5,000

10001+

Climate consulting firms by metro

Metro	Companies
Climate consulting firms in London	463
Climate consulting firms in Edinburgh	34
Climate consulting firms in Bristol	33
Climate consulting firms in Manchester	33
Climate consulting firms in Glasgow	22
Climate consulting firms in Cambridge	18
Climate consulting firms in Leeds	18

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “climate consulting firms”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 131 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

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

There are 1,364 climate consulting firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Arcadis, headquartered in Croydon, tops this list with the largest team on record.

Which city has the most climate consulting firms?

London leads with 463 headquartered companies, followed by Edinburgh (34) and Bristol (33).

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 27,876 verified decision-maker contacts tracked across these 1,364 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.