Company lists · Data refreshed September 2026

Top 25 Sustainable development consultancies based in the United Kingdom

RevenueBase identified 1,864 company matches for sustainable development consultancies associated with the United Kingdom as of September 2026 and tracks 36,796 professional contacts across them, including 19,415 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 September 29, 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 Sep 29, 2026 How this list was built
1,864Companies
36,796Contacts tracked
19,415Verified emails
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The 25 largest sustainable development consultancies based in the United Kingdom

Ranked by team size
Top 25 of 1,864 company matches for sustainable development consultancies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 29, 20265,001-10,0009,119 contacts →

Exact match

“Sustainability is our business.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,0003,848 contacts →

Exact match

“SLR is a committed partner in our clients’ sustainability journeys.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,0002,179 contacts →

Exact match

“Baringa is a global consulting firm that helps leaders drive meaningful change and create value.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,000894 contacts →

Exact match

“Anthesis guides clients to sustainable performance.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 29, 2026501-1,000690 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,000670 contacts →

Exact match

“Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 29, 2026n/a621 contacts →

Exact match

“For over 26 years, our consultants have been supporting and guiding our clients to achieve low-carbon climate-resilient development.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchChesterton, United KingdomHQ recorded Sep 29, 2026501-1,000589 contacts →

Exact match

“Dalcour Maclaren: delivering land, stakeholder and environmental solutions.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9Exact matchCastle Douglas, United KingdomHQ recorded Sep 29, 2026501-1,000500 contacts →

Exact match

“Natural Power is a leading independent consultancy and service provider for the renewable energy sector.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchStockport, United KingdomHQ recorded Sep 29, 202651-200418 contacts →

Exact match

“Fichtner is one of the world's leading independent engineering consultancy firms.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchLiverpool, United KingdomHQ recorded Sep 29, 2026201-500371 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 · Sep 29, 2026 · View company records in RevenueBase
12Exact matchAlmondsbury, United KingdomHQ recorded Sep 29, 2026501-1,000352 contacts →

Exact match

“Hydrock now Stantec is an integrated engineering design, energy and sustainability consultancy.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchManchester, United KingdomHQ recorded Sep 29, 2026201-500348 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 · Sep 29, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 29, 202651-200323 contacts →

Exact match

“As environmental design consultants, building services engineers and lighting designers, we are committed to high performance and sustainable design within the built environment.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchRedditch, United KingdomHQ recorded Sep 29, 202651-200316 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchEltham, United KingdomHQ recorded Sep 29, 2026201-500270 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 · Sep 29, 2026 · View company records in RevenueBase
17Exact matchBirmingham, United KingdomHQ recorded Sep 29, 2026501-1,000253 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 29, 2026201-500231 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 · Sep 29, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 29, 202651-200185 contacts →

Exact match

“The Renewable Energy Consultants.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 29, 202651-200178 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 · Sep 29, 2026 · View company records in RevenueBase
21Exact matchHelsby, United KingdomHQ recorded Sep 29, 2026201-500164 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 · Sep 29, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 29, 202651-200158 contacts →

Exact match

“Acre is the global market leader for sustainability executive search and recruitment services, exclusively focused on integrating sustainability and catalysing positive change…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchLeeds, United KingdomHQ recorded Sep 29, 202651-200156 contacts →

Exact match

“Aqua Consultants provide tailored environmental consultancy to broaden your thinking, lead transformation, and achieve successful outcomes.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 29, 202651-200154 contacts →

Exact match

“Quod is a specialist, independent consultancy at the cutting edge of planning and development economics.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchGlasgow, United KingdomHQ recorded Sep 29, 2026201-500153 contacts →

Exact match

“Arthian has been established following a merger between Mabbett and IKM Consulting.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 1,864 sustainable development consultancies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 19,415 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Sustainable development consultancies based in the United Kingdom at a glance

As of Sep 29, 2026
52.8%Verified-email coverage
19.7Average contacts per company
1-10Median size (employees)
33.3%Largest-city concentration · London
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
1,370
11-50
353
51-200
93
201-500
19
501-1,000
7
1,001-5,000
7
5,001-10,000
2
10001+
1

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 1,864 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 19,415 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 September 29, 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.

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 1,864 company matches for sustainable development consultancies associated with the United Kingdom as of September 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 620 company records, followed by Bristol (45) and Edinburgh (39).

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 19,415 professional contacts with verified work emails tracked across these 1,864 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 September 29, 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.