Company lists · Data refreshed September 2026

Top 25 Environmental consultancy firms based in London, United Kingdom

Name: Environmental consultancy firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 12, 2026 429 companies tracked

RevenueBase identified 429 environmental consultancy firms headquartered in London, United Kingdom as of September 2026 and tracks 23,107 professional contacts across them, including 12,865 with verified work emails and 2,919 with mobile numbers. London is the largest hub.

This list covers environmental consultancy firms headquartered in London, 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 12, 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 12, 2026 86% judged on-target in blind review

429Companies

23,107Contacts tracked

12,865Verified emails

2,919Mobile numbers

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The 25 largest environmental consultancy firms based in London, United Kingdom

Ranked by team size

Top 25 of 429 environmental consultancy firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 12, 2026. RevenueBase Smart Search rates how each company's information relates to environmental consultancy firms: 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	ERM	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	5,001-10,000	9,119 contacts →
	Indirect evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 12, 2026
2	SLR Consulting	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	1,001-5,000	3,848 contacts →
	Indirect evidence “SLR is a committed partner in our clients’ sustainability journeys.” Source: RevenueBase Database · checked Sep 12, 2026
3	Baringa	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	1,001-5,000	2,179 contacts →
	Indirect evidence “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Source: RevenueBase Database · checked Sep 12, 2026
4	Hoare LEA	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	1,103 contacts →
	Partial evidence “We are an award-winning engineering consultancy with a creative team of engineers, designers, and technical specialists.” Source: RevenueBase Database · checked Sep 12, 2026
5	Pell Frischmann	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	690 contacts →
	Strong evidence “Pell Frischmann is a specialist advisory and technical consultancy operating across the built and natural environment, helping to shape a better future for the communities in…” Source: RevenueBase Database · checked Sep 12, 2026
6	Ricardo PLC	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	1,001-5,000	670 contacts →
	Indirect evidence “Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.” Source: RevenueBase Database · checked Sep 12, 2026
7	Waterman Group	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	1,001-5,000	563 contacts →
	Partial evidence “Waterman Group is a multidisciplinary consultancy providing sustainable solutions to meet the planning, engineering design and project delivery needs of the property…” Source: RevenueBase Database · checked Sep 12, 2026
8	LUC	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	383 contacts →
	Strong evidence “LUC is an independent, employee-owned environmental consultancy celebrating its 60th anniversary.” Source: RevenueBase Database · checked Sep 12, 2026
9	Atelier TEN	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	323 contacts →
	Strong evidence “As environmental design consultants, building services engineers and lighting designers, we are committed to high performance and sustainable design within the built environment.” Source: RevenueBase Database · checked Sep 12, 2026
10	The Erith Group	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	217 contacts →
	Partial evidence “Supported by a network of specialist consulting engineers, environmentalists and our own collective experience, our philosophy is simple: to provide a qualitative economic and…” Source: RevenueBase Database · checked Sep 12, 2026
11	JURU	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	176 contacts →
	Strong evidence “Founded in 2015, Juru is an international engineering and consultancy firm with a mission to solve engineering and environmental problems.” Source: RevenueBase Database · checked Sep 12, 2026
12	Mrag LTD	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	103 contacts →
	Partial evidence “Established in the UK in 1986, MRAG Ltd is a consultancy company dedicated to promoting sustainable use of aquatic resources through sound integrated management policies and…” Source: RevenueBase Database · checked Sep 12, 2026
13	Greengage Environmental LTD	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	93 contacts →
	Strong evidence “Greengage is an independent sustainability and environmental consultancy known for providing bespoke advice and working in partnership with our clients and multi-disciplinary…” Source: RevenueBase Database · checked Sep 12, 2026
14	Hurley Palmer Flatt	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	91 contacts →
	Partial evidence “In 2019, Hurley Palmer Flatt, the UK’s leading independent multidisciplinary engineering consultancy, joined global design firm HDR.” Source: RevenueBase Database · checked Sep 12, 2026
15	FHP Group	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	86 contacts →
	Partial evidence “FHP Group is a leading Mechanical, Electrical, Public Health, Energy and Sustainability engineering consultancy with over 50 years of experience!” Source: RevenueBase Database · checked Sep 12, 2026
16	Tor&co	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	85 contacts →
	Strong evidence “tor & co is a planning, design and environmental consultancy with a human focus.” Source: RevenueBase Database · checked Sep 12, 2026
17	Xco2	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	84 contacts →
	Strong evidence “We are a multidisciplinary group with backgrounds in engineering, architecture and environmental science, working as consultants for buildings, large developments and masterplans…” Source: RevenueBase Database · checked Sep 12, 2026
18	FLAG	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	84 contacts →
	Indirect evidence “We're a global sustainability agency, providing strategy, communications and reporting support to the world’s leading brands.” Source: RevenueBase Database · checked Sep 12, 2026
19	Hudson Sandler	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	67 contacts →
	Partial evidence “We are an independent strategic communications and ESG consultancy headquartered in London.” Source: RevenueBase Database · checked Sep 12, 2026
20	Action Sustainability	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	62 contacts →
	Indirect evidence “Recognised for its commitment to employees with a sought-after Best Companies “One To Watch” industry standard, Action Sustainability offers a 3-in-1 solution through…” Source: RevenueBase Database · checked Sep 12, 2026
21	Foreman Roberts	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	61 contacts →
	Partial evidence “Foreman Roberts are International Building Services, Energy and Sustainability Consultants who have a reputation for delivering a high quality service on projects both in the UK…” Source: RevenueBase Database · checked Sep 12, 2026
22	Qoda Consulting	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	58 contacts →
	Indirect evidence “Welcome to QODA: working hard to meet the needs of our clients and all those who use the buildings we help to create.” Source: RevenueBase Database · checked Sep 12, 2026
23	Cares Group	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	48 contacts →
	Strong evidence “We are an international Engineering consultant with a team of over 40 chartered engineers, environmentalists, Maritime experts, and technicians across West Africa, UK, and…” Source: RevenueBase Database · checked Sep 12, 2026
24	Logika Group	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	43 contacts →
	Strong evidence “Logika Group provides clients with a broad range of high quality environmental and design consultancy services.” Source: RevenueBase Database · checked Sep 12, 2026
25	Eight Versa	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	42 contacts →
	Indirect evidence “At Eight Versa, we deliver a new direction for a balanced future.” Source: RevenueBase Database · checked Sep 12, 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: environmental consultancy firms. 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 environmental consultancy firms.
Partial evidence: Its own public description names part of environmental consultancy firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental consultancy firms. 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 429 environmental consultancy firms based in London, United Kingdom

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Environmental consultancy firms based in London, United Kingdom at a glance

As of Sep 12, 2026

55.7%Verified-email coverage

12.6%Mobile-number coverage

53.9Average contacts per company

1-10Median size (employees)

88.1%Largest-city concentration · London

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

276

11-50

104

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 14.0d

10,8660–30

1,86531–60

6661–90

190–180

67180+

Company record updated

Median 63.0d

00–30

10,52031–60

9,32961–90

1,97790–180

1,281180+

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 environmental consultancy firms, 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 London, United Kingdom whose own description of what they do matches “environmental consultancy firms”. 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 environmental consultancy firms), 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 environmental consultancy firms, and records with no verified work email. Companies headquartered outside London 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, 12,865 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 12, 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.

Environmental consultancy firms by metro in the United Kingdom

Environmental consultancy firms in London378
Environmental consultancy firms in Manchester54
Environmental consultancy firms in Bristol45
Environmental consultancy firms in Edinburgh32
Environmental consultancy firms in Glasgow30
Environmental consultancy firms in Leeds29
Environmental consultancy firms in Cardiff26

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 environmental consultancy firms, 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 environmental consultancy firms are there based in London, United Kingdom?

RevenueBase identified 429 environmental consultancy firms headquartered in London, 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?

ERM, headquartered in London, tops this list with the largest team on record.

Which city has the most environmental consultancy firms?

London leads with 378 headquartered companies, followed by Manchester (54) and Bristol (45).

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 12,865 verified decision-maker contacts tracked across these 429 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 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 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.