Company lists · Data refreshed September 2026

Top 25 Carbon neutral contractors based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 529 companies tracked

RevenueBase identified 529 carbon neutral contractors headquartered in London, United Kingdom as of September 2026 and tracks 25,120 professional contacts across them, including 13,038 with verified work emails. London is the largest hub.

This list covers carbon neutral contractors 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 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

529Companies

25,120Contacts tracked

13,038Verified emails

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The 25 largest carbon neutral contractors based in London, United Kingdom

Ranked by team size

Top 25 of 529 carbon neutral contractors based in London, 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	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
4	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
5	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
6	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
7	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
8	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
9	Elliott Wood	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	147 contacts →
	Indirect evidence “We believe in a bigger and better idea of engineering.” Source: RevenueBase Database · checked Sep 16, 2026
10	JD Ross Energy	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	143 contacts →
	Indirect evidence “JD Ross Energy is an international talent consultancy that solely focuses on the Renewable Energy sector, connecting the best talent across the globe with companies that are…” Source: RevenueBase Database · checked Sep 16, 2026
11	ZTP	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	115 contacts →
	Indirect 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 16, 2026
12	Longevity Partners	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	115 contacts →
	Indirect evidence “Longevity Partners is a multidisciplinary energy and sustainability consultancy.” Source: RevenueBase Database · checked Sep 16, 2026
13	Sidara	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	10001+	112 contacts →
	Indirect evidence “Sidara is a global collaborative of leading specialist firms designing for people and the planet.” Source: RevenueBase Database · checked Sep 16, 2026
14	WALSH	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	110 contacts →
	Indirect evidence “Walsh is a B Corp Certified structural, civil and geotechnical engineering consultancy specialising in complex developments on constrained urban sites.” Source: RevenueBase Database · checked Sep 16, 2026
15	Greengage Environmental LTD	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	93 contacts →
	Indirect 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 16, 2026
16	Alfa Energy An Edison Energy Company	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	88 contacts →
	Indirect 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 16, 2026
17	Alan Baxter LTD	Indirect evidence	London, United KingdomHQ checked Sep 16, 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 16, 2026
18	MYCO	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	85 contacts →
	Indirect evidence “Myco Contracts Ltd are a multi-faceted Construction Company with all the skills you need under one roof.” Source: RevenueBase Database · checked Sep 16, 2026
19	Purdy Part Of Sureserve	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	85 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 16, 2026
20	Xco2	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	84 contacts →
	Indirect 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 16, 2026
21	AMD Group	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	82 contacts →
	Indirect evidence “AMD Environmental are a collaborative Mechanical and Electrical Design and Build Engineering specialist with a sustainable approach in delivering challenging and bespoke projects…” Source: RevenueBase Database · checked Sep 16, 2026
22	Bennetts Associates	Indirect evidence	London, United KingdomHQ checked Sep 16, 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 16, 2026
23	Architype	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	70 contacts →
	Indirect evidence “Architype Ltd is an architectural practice working from offices in Hereford, London and Edinburgh.” Source: RevenueBase Database · checked Sep 16, 2026
24	Planet Mark	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	69 contacts →
	Indirect evidence “Planet Mark is a sustainability certification and net zero provider for organisations and the built environment.” Source: RevenueBase Database · checked Sep 16, 2026
25	ECD Architects LTD	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	64 contacts →
	Indirect evidence “We are an award-winning architectural practice specialising in the design of low energy, low environmental impact buildings, cost effectively and to the highest quality standards.” 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 529 carbon neutral contractors based in London, United Kingdom

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Carbon neutral contractors based in London, United Kingdom at a glance

As of Sep 16, 2026

51.9%Verified-email coverage

47.5Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

328

11-50

139

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 529 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 London, 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 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, 13,038 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 in the United Kingdom

Carbon neutral contractors in London529
Carbon neutral contractors in Glasgow54
Carbon neutral contractors in Manchester54
Carbon neutral contractors in Bristol36
Carbon neutral contractors in Leeds36
Carbon neutral contractors in Edinburgh31
Carbon neutral contractors in Nottingham26
Carbon neutral contractors in Birmingham25

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 London, United Kingdom?

RevenueBase identified 529 carbon neutral contractors 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 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 13,038 verified decision-maker contacts tracked across these 529 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.