Company lists · Data refreshed November 2026

Top 25 Sustainable development consultancies based in the United Kingdom

Name: Sustainable development consultancies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 1,527 companies tracked

RevenueBase identified 1,527 company matches for sustainable development consultancies associated with the United Kingdom as of November 2026 and tracks 28,584 professional contacts across them, including 14,851 with verified work emails. London is the largest hub.

This list covers company matches for sustainable development consultancies 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 November 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 RevenueBase SmartSearch · Exact Recorded Nov 5, 2026 How this list was built

1,527Companies

28,584Contacts tracked

14,851Verified emails

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The 25 largest sustainable development consultancies based in the United Kingdom

Ranked by team size

Top 25 of 1,527 company matches for sustainable development consultancies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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	ERM	Exact match	London, United KingdomHQ recorded Nov 5, 2026	5,001-10,000	9,761 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	SLR Consulting	Exact match	London, United KingdomHQ recorded Nov 5, 2026	1,001-5,000	4,208 contacts →
	Exact match “SLR is a committed partner in our clients’ sustainability journeys.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3	Business In The Community	Exact match	London, United KingdomHQ recorded Nov 5, 2026	201-500	505 contacts →
	Exact match “Business in the Community (BITC) champions responsible business as essential for long term economic growth and resilience.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	Turley	Exact match	Manchester, United KingdomHQ recorded Nov 5, 2026	201-500	394 contacts →
	Exact match “Offering expert advisory services for the built environment and beyond, we work collaboratively with our clients to deliver places and communities that thrive.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5	Curtins	Exact match	Liverpool, United KingdomHQ recorded Nov 5, 2026	201-500	381 contacts →
	Exact match “At Curtins we believe that the true value of our work is defined by the difference for good we make in the lives of real people.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	Baily Garner	Exact match	Eltham, United KingdomHQ recorded Nov 5, 2026	201-500	329 contacts →
	Exact match “Baily Garner is a leading multidisciplinary construction consultancy on a mission to positively impact people's lives.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	International Institute For Environment And Development Iied	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	239 contacts →
	Exact match “The International Institute for Environment and Development (IIED) is a global leader in sustainable development.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	Hilson Moran	Exact match	London, United KingdomHQ recorded Nov 5, 2026	201-500	234 contacts →
	Exact match “We are interdisciplinary consultants, engineers and advisors, applying progressive design thinking to shape the environments we live in.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	Economist Intelligence EIU	Exact match	London, United KingdomHQ recorded Nov 5, 2026	201-500	218 contacts →
	Exact match “We work with our clients to help them navigate the increasingly complex global environment, to analyse political and economic developments, forecast economic trends, and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	Iceni Projects	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	192 contacts →
	Exact match “At Iceni Projects we believe that everything we do is ultimately about people – and as a consultancy operating within the built environment, for people read place.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	RSK Biocensus	Exact match	Helsby, United KingdomHQ recorded Nov 5, 2026	201-500	181 contacts →
	Exact match “RSK Biocensus is an ecological consultancy with a presence across the country and an extensive network of ecologists throughout the UK.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	QUOD	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	161 contacts →
	Exact match “Quod is a specialist, independent consultancy at the cutting edge of planning and development economics.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Lexington	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	133 contacts →
	Exact match “Lexington is a leading independent strategic consultancy.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Longevity Partners	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	128 contacts →
	Exact match “Longevity Partners is a multidisciplinary energy and sustainability consultancy.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	Middlemarch	Exact match	Coventry, United KingdomHQ recorded Nov 5, 2026	51-200	118 contacts →
	Exact match “With a legacy of over 30 years, we are a UK leading independent consultancy specialising in the preservation of the natural environment.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	Mrag LTD	Exact match	London, United KingdomHQ recorded Nov 5, 2026	11-50	105 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Greengage Environmental LTD	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	100 contacts →
	Exact match “Greengage is an independent sustainability and environmental consultancy known for providing bespoke advice and working in partnership with our clients and multi-disciplinary…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	BOYER	Exact match	Blackwater, United KingdomHQ recorded Nov 5, 2026	51-200	100 contacts →
	Exact match “Boyer is a multi-skilled planning consultancy with a network of offices serving the UK.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Rappor	Exact match	Cheltenham, United KingdomHQ recorded Nov 5, 2026	51-200	98 contacts →
	Exact match “Rappor is an engineering and environmental consultancy working in partnership to steer sustainable development.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Alan Baxter LTD	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	92 contacts →
	Exact match “We believe that a holistic approach creates better buildings and healthier places to live and work.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	SAC Consulting	Exact match	Edinburgh, United KingdomHQ recorded Nov 5, 2026	51-200	89 contacts →
	Exact match “SAC Consulting is one of the leading agricultural consultancies in the UK, uniquely placed to support the sustainable growth and prosperity of agriculture, food, and land-based…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Green CAT Renewables LTD	Exact match	Biggar, United KingdomHQ recorded Nov 5, 2026	51-200	89 contacts →
	Exact match “Green Cat Renewables is a dynamic, innovative, and growing company that provides tailored support to the needs of the individual developer throughout the entire development…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Rammsanderson Ecology LTD	Exact match	Beeston, United KingdomHQ recorded Nov 5, 2026	51-200	89 contacts →
	Exact match “RammSanderson Ecology Ltd is a specialist ecological consultancy based at offices in the East Midlands, West Midlands, Yorkshire, North West, South West and South East, offering…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	True Group	Exact match	Guildford, United KingdomHQ recorded Nov 5, 2026	51-200	89 contacts →
	Exact match “True Group empowers business leaders like you with the clarity and confidence to make planet-saving decisions and create a competitive edge through energy and sustainability.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	CSA Environmental	Exact match	Ashwell, United KingdomHQ recorded Nov 5, 2026	51-200	88 contacts →
	Exact match “CSA Environmental is a multidisciplinary environmental consultancy practice providing specialist advice covering Ecology, Heritage, Landscape, and Masterplanning and Urban Design.” Recorded in the RevenueBase company graph · Nov 5, 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 “sustainable development consultancies”. 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 1,527 sustainable development consultancies based in the United Kingdom

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Sustainable development consultancies based in the United Kingdom at a glance

As of Nov 5, 2026

52.0%Verified-email coverage

18.7Average contacts per company

1-10Median size (employees)

35.1%Largest-city concentration · London

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

1,124

11-50

289

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,527 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 “sustainable development consultancies” 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 14,851 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 November 5, 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.

Sustainable development consultancies by metro

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 “sustainable development consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sustainable development consultancies are there based in the United Kingdom?

RevenueBase identified 1,527 company matches for sustainable development consultancies associated with the United Kingdom as of November 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?

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

Which city has the most sustainable development consultancies?

London leads with 536 company records, followed by Bristol (40) and Manchester (35).

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 14,851 professional contacts with verified work emails tracked across these 1,527 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 November 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.