Company lists · Data refreshed September 2026

Top 25 Sustainable design consultants based in London, United Kingdom

Name: Sustainable design consultants based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 647 companies tracked

RevenueBase identified 647 sustainable design consultants headquartered in London, United Kingdom as of September 2026 and tracks 28,068 professional contacts across them, including 15,204 with verified work emails. London is the largest hub.

This list covers sustainable design consultants 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 22, 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 22, 2026 86% judged on-target in blind review

647Companies

28,068Contacts tracked

15,204Verified emails

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The 25 largest sustainable design consultants based in London, United Kingdom

Ranked by team size

Top 25 of 647 sustainable design consultants based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable design consultants: 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	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	5,001-10,000	9,119 contacts →
	Partial evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 22, 2026
2	SLR Consulting	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	3,848 contacts →
	Partial evidence “SLR is a committed partner in our clients’ sustainability journeys.” Source: RevenueBase Database · checked Sep 22, 2026
3	Baringa	Indirect evidence	London, United KingdomHQ checked Sep 22, 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 22, 2026
4	Hoare LEA	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	501-1,000	1,103 contacts →
	Strong evidence “We are an award-winning engineering consultancy with a creative team of engineers, designers, and technical specialists.” Source: RevenueBase Database · checked Sep 22, 2026
5	Pell Frischmann	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	501-1,000	690 contacts →
	Partial 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 22, 2026
6	Ricardo PLC	Indirect evidence	London, United KingdomHQ checked Sep 22, 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 22, 2026
7	Atelier TEN	Strong evidence	London, United KingdomHQ checked Sep 22, 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 22, 2026
8	HTA Design	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	243 contacts →
	Partial evidence “HTA are a practice of more than 200 people, bringing together the creative talents of architects, urbanists, planners, landscape architects, interior designers, engagement and…” Source: RevenueBase Database · checked Sep 22, 2026
9	Hilson Moran	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	231 contacts →
	Strong evidence “We are interdisciplinary consultants, engineers and advisors, applying progressive design thinking to shape the environments we live in.” Source: RevenueBase Database · checked Sep 22, 2026
10	The Erith Group	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	501-1,000	217 contacts →
	Indirect 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 22, 2026
11	MAX Fordham LLP	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	208 contacts →
	Strong evidence “Max Fordham LLP is a partnership of engineers, designers and consultants, working with the built environment, to deliver a sustainable future and a thriving planet.” Source: RevenueBase Database · checked Sep 22, 2026
12	JURU	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	176 contacts →
	Partial 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 22, 2026
13	ACRE	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	158 contacts →
	Partial evidence “Acre is the global market leader for sustainability executive search and recruitment services, exclusively focused on integrating sustainability and catalysing positive change…” Source: RevenueBase Database · checked Sep 22, 2026
14	Elliott Wood	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	147 contacts →
	Indirect evidence “We believe in a bigger and better idea of engineering.” Source: RevenueBase Database · checked Sep 22, 2026
15	ZTP	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	115 contacts →
	Partial evidence “At ZTP, we’re committed to accelerating the transition to a more sustainable future by reducing the negative impact of human activity on our planet - ecologically, financially…” Source: RevenueBase Database · checked Sep 22, 2026
16	Longevity Partners	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	115 contacts →
	Strong evidence “Longevity Partners is a multidisciplinary energy and sustainability consultancy.” Source: RevenueBase Database · checked Sep 22, 2026
17	Sidara	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	10001+	112 contacts →
	Partial evidence “Sidara is a global collaborative of leading specialist firms designing for people and the planet.” Source: RevenueBase Database · checked Sep 22, 2026
18	Greengage Environmental LTD	Strong evidence	London, United KingdomHQ checked Sep 22, 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 22, 2026
19	Jestico Whiles	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	92 contacts →
	Partial evidence “Jestico + Whiles is an award-winning international architecture and interior design practice based in Clerkenwell, London.” Source: RevenueBase Database · checked Sep 22, 2026
20	Sustainable Advantage	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	89 contacts →
	Partial evidence “Sustainable Advantage partners with Private Equity funds and businesses across the UK, France, and wider Europe.” Source: RevenueBase Database · checked Sep 22, 2026
21	Alfa Energy An Edison Energy Company	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	88 contacts →
	Strong evidence “Alfa Energy Group (an Edison Energy company) is an international energy, sustainability and technology consultant partner with 200 employees over four international locations.” Source: RevenueBase Database · checked Sep 22, 2026
22	Alan Baxter LTD	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	87 contacts →
	Indirect evidence “We believe that a holistic approach creates better buildings and healthier places to live and work.” Source: RevenueBase Database · checked Sep 22, 2026
23	FHP Group	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	86 contacts →
	Strong 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 22, 2026
24	Xco2	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	84 contacts →
	Partial 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 22, 2026
25	Bennetts Associates	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	72 contacts →
	Indirect evidence “Bennetts Associates is one of the UK’s leading architectural practices, recognised for creating elegant, human-centred buildings through an ethos of doing ‘More With Less’.” Source: RevenueBase Database · checked Sep 22, 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: sustainable design consultants. 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 sustainable design consultants.
Partial evidence: Its own public description names part of sustainable design consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable design consultants. 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 647 sustainable design consultants based in London, United Kingdom

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Sustainable design consultants based in London, United Kingdom at a glance

As of Sep 22, 2026

54.2%Verified-email coverage

43.4Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

432

11-50

151

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 647 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 sustainable design consultants, 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 “sustainable design consultants”. 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 sustainable design consultants), 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 sustainable design consultants, 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, 15,204 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 22, 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.

Sustainable design consultants by metro in the United Kingdom

Sustainable design consultants in London647
Sustainable design consultants in Manchester56
Sustainable design consultants in Bristol47
Sustainable design consultants in Glasgow42
Sustainable design consultants in Leeds38
Sustainable design consultants in Edinburgh33

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 sustainable design consultants, 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 sustainable design consultants are there based in London, United Kingdom?

RevenueBase identified 647 sustainable design consultants 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 sustainable design consultants?

London leads with 647 headquartered companies, followed by Manchester (56) and Bristol (47).

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 15,204 verified decision-maker contacts tracked across these 647 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 22, 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.