Company lists · Data refreshed September 2026

Top 25 Carbon neutral contractors based in the United Kingdom

Name: Carbon neutral contractors based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 2,287 companies tracked

RevenueBase identified 2,287 carbon neutral contractors headquartered in the United Kingdom as of September 2026 and tracks 47,784 professional contacts across them, including 24,203 with verified work emails. London is the largest hub.

This list covers carbon neutral contractors headquartered in the 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 16, 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 16, 2026 86% judged on-target in blind review

2,287Companies

47,784Contacts tracked

24,203Verified emails

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The 25 largest carbon neutral contractors based in the United Kingdom

Ranked by team size

Top 25 of 2,287 carbon neutral contractors based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to carbon neutral contractors: 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 16, 2026	5,001-10,000	9,119 contacts →
	Indirect evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 16, 2026
2	SLR Consulting	Indirect evidence	London, United KingdomHQ checked Sep 16, 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 16, 2026
3	Ridge And Partners LLP	Indirect evidence	Woodstock, United KingdomHQ checked Sep 16, 2026	1,001-5,000	1,427 contacts →
	Indirect evidence “Ridge is a built environment consultancy, helping clients turn complex briefs into buildings and infrastructure that perform in the real world.” Source: RevenueBase Database · checked Sep 16, 2026
4	Cundall	Indirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 16, 2026	1,001-5,000	1,269 contacts →
	Indirect evidence “We are a global, multi-disciplinary consultancy delivering sustainable engineering and design solutions across the built environment.” Source: RevenueBase Database · checked Sep 16, 2026
5	Hoare LEA	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	501-1,000	1,103 contacts →
	Indirect evidence “We are an award-winning engineering consultancy with a creative team of engineers, designers, and technical specialists.” Source: RevenueBase Database · checked Sep 16, 2026
6	Ricardo PLC	Indirect evidence	London, United KingdomHQ checked Sep 16, 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 16, 2026
7	Vinci Building UK	Indirect evidence	Watford, United KingdomHQ checked Sep 16, 2026	501-1,000	553 contacts →
	Indirect evidence “VINCI Building delivers complex projects and programmes focussing on technical excellence and experience to sustainably deliver best value for our clients.” Source: RevenueBase Database · checked Sep 16, 2026
8	Natural Power	Indirect evidence	Castle Douglas, United KingdomHQ checked Sep 16, 2026	501-1,000	500 contacts →
	Indirect evidence “Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Source: RevenueBase Database · checked Sep 16, 2026
9	Fairhurst	Indirect evidence	Glasgow, United KingdomHQ checked Sep 16, 2026	201-500	437 contacts →
	Indirect evidence “Welcome to Fairhurst: Fairhurst is a Limited Liability Partnership (LLP) of Consulting Engineers practicing in the UK, employing circa 400 staff in 16 principal offices.” Source: RevenueBase Database · checked Sep 16, 2026
10	Fichtner Consulting Engineers LTD	Indirect evidence	Stockport, United KingdomHQ checked Sep 16, 2026	51-200	418 contacts →
	Indirect evidence “Fichtner is one of the world's leading independent engineering consultancy firms.” Source: RevenueBase Database · checked Sep 16, 2026
11	IES LTD	Indirect evidence	Glasgow, United KingdomHQ checked Sep 16, 2026	201-500	374 contacts →
	Indirect evidence “IES is an innovative company at the forefront of the development and application of powerful software simulation tools and consulting services for architects, engineers and others…” Source: RevenueBase Database · checked Sep 16, 2026
12	Curtins	Indirect evidence	Liverpool, United KingdomHQ checked Sep 16, 2026	201-500	371 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
13	Hydrock, NOW Stantec	Indirect evidence	Almondsbury, United KingdomHQ checked Sep 16, 2026	501-1,000	352 contacts →
	Indirect evidence “Hydrock now Stantec is an integrated engineering design, energy and sustainability consultancy.” Source: RevenueBase Database · checked Sep 16, 2026
14	Turley	Indirect evidence	Manchester, United KingdomHQ checked Sep 16, 2026	201-500	348 contacts →
	Indirect evidence “Offering expert advisory services for the built environment and beyond, we work collaboratively with our clients to deliver places and communities that thrive.” Source: RevenueBase Database · checked Sep 16, 2026
15	Atelier TEN	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	323 contacts →
	Indirect 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 16, 2026
16	CPW	Indirect evidence	Birmingham, United KingdomHQ checked Sep 16, 2026	201-500	317 contacts →
	Indirect evidence “Climate change is without a doubt the greatest challenge we face in these times.” Source: RevenueBase Database · checked Sep 16, 2026
17	EIC Partnership	Indirect evidence	Redditch, United KingdomHQ checked Sep 16, 2026	51-200	316 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
18	AHR	Indirect evidence	Manchester, United KingdomHQ checked Sep 16, 2026	201-500	303 contacts →
	Indirect evidence “We are architects and building consultants who believe places have the power to shape a more positive future - for the people who use them, for local communities, and for our…” Source: RevenueBase Database · checked Sep 16, 2026
19	Baily Garner	Indirect evidence	Eltham, United KingdomHQ checked Sep 16, 2026	201-500	270 contacts →
	Indirect evidence “Baily Garner is a leading multidisciplinary construction consultancy on a mission to positively impact people's lives.” Source: RevenueBase Database · checked Sep 16, 2026
20	Wardell Armstrong LLP NOW SLR	Indirect evidence	Birmingham, United KingdomHQ checked Sep 16, 2026	501-1,000	253 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
21	Hilson Moran	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	231 contacts →
	Indirect evidence “We are interdisciplinary consultants, engineers and advisors, applying progressive design thinking to shape the environments we live in.” Source: RevenueBase Database · checked Sep 16, 2026
22	The Erith Group	Indirect evidence	London, United KingdomHQ checked Sep 16, 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 16, 2026
23	MAX Fordham LLP	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	208 contacts →
	Indirect 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 16, 2026
24	Frankham Group	Indirect evidence	Sidcup, United KingdomHQ checked Sep 16, 2026	51-200	192 contacts →
	Indirect evidence “The Frankham Group provides a full range of consultany services to the built environment, including design, engineering and compliance.” Source: RevenueBase Database · checked Sep 16, 2026
25	Potter Raper	Indirect evidence	Beckenham, United KingdomHQ checked Sep 16, 2026	51-200	175 contacts →
	Indirect evidence “At Potter Raper, we work with you to create buildings and infrastructure that enhances lives.” Source: RevenueBase Database · checked Sep 16, 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: carbon neutral contractors. 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 carbon neutral contractors.
Partial evidence: Its own public description names part of carbon neutral contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name carbon neutral contractors. 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 2,287 carbon neutral contractors based in the United Kingdom

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Carbon neutral contractors based in the United Kingdom at a glance

As of Sep 16, 2026

50.7%Verified-email coverage

20.9Average contacts per company

1-10Median size (employees)

23.1%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

1,413

11-50

642

51-200

159

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 2,287 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 carbon neutral contractors, 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 the United Kingdom whose own description of what they do matches “carbon neutral contractors”. 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 carbon neutral contractors), 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 carbon neutral contractors, and records with no verified work email. Companies headquartered outside United Kingdom 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, 24,203 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 16, 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.

Carbon neutral contractors by metro

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 carbon neutral contractors, 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 carbon neutral contractors are there based in the United Kingdom?

RevenueBase identified 2,287 carbon neutral contractors headquartered in the 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 carbon neutral contractors?

London leads with 529 headquartered companies, followed by Glasgow (54) and Manchester (54).

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 24,203 verified decision-maker contacts tracked across these 2,287 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 16, 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.