Company lists · Data refreshed September 2026

Top 25 Green building consultants worldwide

Name: Green building consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 9,915 companies tracked

RevenueBase identified 9,915 green building consultants worldwide as of September 2026 and tracks 95,454 professional contacts across them, including 37,503 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers green building consultants worldwide, 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. Country and city lists for green building consultants follow the table.

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

9,915Companies

95,454Contacts tracked

37,503Verified emails

0Mobile numbers

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The 25 largest green building consultants worldwide

Ranked by team size

Top 25 of 9,915 green building consultants worldwide, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to green building 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	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	Mckinstry	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,213 contacts →
	Indirect evidence “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Source: RevenueBase Database · checked Sep 16, 2026
3	OLA	Indirect evidence	Austin, TX, United StatesHQ checked Sep 16, 2026	n/a	1,145 contacts →
	Indirect evidence “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Source: RevenueBase Database · checked Sep 16, 2026
4	Hoare LEA	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	501-1,000	1,103 contacts →
	Partial 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
5	BTP Consultants	Partial evidence	Montigny-le-bretonneux, FranceHQ checked Sep 16, 2026	201-500	1,066 contacts →
	Partial evidence “BTP Consultants est un bureau de ̂, et présent à l'échelle nationale depuis plus de.” Source: RevenueBase Database · checked Sep 16, 2026
6	BPA	Partial evidence	Montréal, QC, CanadaHQ checked Sep 16, 2026	1,001-5,000	882 contacts →
	Partial evidence “IMPACTFUL ENGINEERING At BPA, it’s simple: we are building experts.” Source: RevenueBase Database · checked Sep 16, 2026
7	Syska Hennessy Group	Indirect evidence	New York, United StatesHQ checked Sep 16, 2026	501-1,000	803 contacts →
	Indirect evidence “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Source: RevenueBase Database · checked Sep 16, 2026
8	Bengt Dahlgren	Indirect evidence	Stockholm, SwedenHQ checked Sep 16, 2026	501-1,000	602 contacts →
	Indirect evidence “Vi vill vara en föregångare i bygg- och fastighetsbranschen till effektiva, miljövänliga och motståndskraftiga fastigheter för människor att må bra i.” Source: RevenueBase Database · checked Sep 16, 2026
9	ADP Consulting	Partial evidence	Melbourne, AustraliaHQ checked Sep 16, 2026	201-500	468 contacts →
	Partial evidence “ADP Consulting, an Ayesa company, is a sustainability-led engineering consultancy on a quest to inspire a better world through influence and design.” Source: RevenueBase Database · checked Sep 16, 2026
10	Sitelogiq	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 16, 2026	501-1,000	450 contacts →
	Indirect evidence “SitelogIQ provides design, engineering, and construction management services that help organizations nationwide modernize their facilities and infrastructure.” Source: RevenueBase Database · checked Sep 16, 2026
11	AEI Consultants	Strong evidence	Walnut Creek, CA, United StatesHQ checked Sep 16, 2026	201-500	433 contacts →
	Strong evidence “AEI Consultants provides building, environmental, land and sustainability assessment and consulting services throughout North America.” Source: RevenueBase Database · checked Sep 16, 2026
12	Greenflex	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	501-1,000	390 contacts →
	Indirect evidence “Since 2009, GreenFlex has been a key partner in the energy, environmental and societal transformation of organizations, enabling them to change their trajectory towards an economy…” Source: RevenueBase Database · checked Sep 16, 2026
13	Arcxis	Indirect evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	501-1,000	389 contacts →
	Indirect evidence “ARCXIS (Formerly DPIS Builder Services), is the largest provider of HERS inspections, ENERGY STAR ratings, engineering and design, construction quality assurance and other builder…” Source: RevenueBase Database · checked Sep 16, 2026
14	Glumac	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 16, 2026	201-500	386 contacts →
	Partial evidence “Glumac, a Tetra Tech Company, is a global leader in building engineering, committed to delivering a low carbon future for all.” Source: RevenueBase Database · checked Sep 16, 2026
15	P2s	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 16, 2026	201-500	375 contacts →
	Indirect evidence “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Source: RevenueBase Database · checked Sep 16, 2026
16	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
17	AESG	Partial evidence	London, United Arab EmiratesHQ checked Sep 16, 2026	201-500	373 contacts →
	Partial evidence “AESG is an international Consultancy, Engineering and Advisory firm committed to driving sustainability in the built environment and beyond.” Source: RevenueBase Database · checked Sep 16, 2026
18	EMM Consulting PTY Limited	Indirect evidence	St Leonards, AustraliaHQ checked Sep 16, 2026	201-500	361 contacts →
	Indirect evidence “At EMM, we believe that a sustainable future is achievable, and we are dedicated to helping our clients and the community make it a reality.” Source: RevenueBase Database · checked Sep 16, 2026
19	Wendel Companies	Indirect evidence	Williamsville, NY, United StatesHQ checked Sep 16, 2026	201-500	355 contacts →
	Indirect evidence “Wendel is an Architecture, Engineering, Energy Efficiency, and Construction Management Firm that delivers customized solutions and turnkey projects in innovative ways.” Source: RevenueBase Database · checked Sep 16, 2026
20	Hydrock, NOW Stantec	Partial evidence	Almondsbury, United KingdomHQ checked Sep 16, 2026	501-1,000	352 contacts →
	Partial evidence “Hydrock now Stantec is an integrated engineering design, energy and sustainability consultancy.” Source: RevenueBase Database · checked Sep 16, 2026
21	NUS Consulting Group	Indirect evidence	Park Ridge, NJ, United StatesHQ checked Sep 16, 2026	201-500	336 contacts →
	Indirect evidence “National Utility Service, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
22	RDH Building Science	Partial evidence	Burnaby, BC, CanadaHQ checked Sep 16, 2026	201-500	335 contacts →
	Partial evidence “RDH is a multidisciplinary consulting firm specializing in building performance, durability, and resilience.” Source: RevenueBase Database · checked Sep 16, 2026
23	Performance Services	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 16, 2026	201-500	328 contacts →
	Partial evidence “We design and construct high-performing buildings and systems.” Source: RevenueBase Database · checked Sep 16, 2026
24	Atelier TEN	Strong evidence	London, United KingdomHQ checked Sep 16, 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 16, 2026
25	Commtech Asia	Strong evidence	Hong KongHQ checked Sep 16, 2026	201-500	322 contacts →
	Strong evidence “Commtech Asia is a market-leading, independent building commissioning consultant.” 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: green building 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 green building consultants.
Partial evidence: Its own public description names part of green building consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name green building 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 9,915 green building consultants worldwide

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Green building consultants worldwide at a glance

As of Sep 16, 2026

39.3%Verified-email coverage

9.6Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

6,992

11-50

2,294

51-200

435

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 green building 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.
Coverage: 40 countries, largest first: the United States, Germany, France, the United Kingdom, Italy, India, the Netherlands, Spain, Canada, Brazil and 30 more. Country and city lists for green building consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “green building 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 green building 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 green building consultants, and records with no verified work email.
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, 37,503 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.

Green building consultants by location

49 lists · largest first

Every Green building consultants list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 green building 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 green building consultants are there worldwide?

RevenueBase identified 9,915 green building consultants worldwide 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 country has the most green building consultants?

The United States leads with 1,840 companies, followed by Germany (872) and France (860). Every green building consultants list by country and city is linked on this page.

Which city has the most green building consultants?

London leads with 177 headquartered companies, followed by Paris (119) and New York (101).

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 37,503 verified decision-maker contacts tracked across these 9,915 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.