Company lists · Data refreshed October 2026

Top 25 Green building and energy efficiency contractors worldwide

Name: Green building and energy efficiency contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 13, 2026 11,771 companies tracked

RevenueBase identified 11,771 company matches for green building and energy efficiency contractors worldwide as of October 2026 and tracks 118,069 professional contacts across them, including 37,315 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for green building and energy efficiency contractors worldwide, 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 October 13, 2026. Country and city lists for green building and energy efficiency contractors follow the table.

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 Oct 13, 2026 How this list was built

11,771Companies

118,069Contacts tracked

37,315Verified emails

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The 25 largest green building and energy efficiency contractors worldwide

Ranked by team size

Top 25 of 11,771 company matches for green building and energy efficiency contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 13, 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	Julius Berger Nigeria PLC	Exact match	Utako, NigeriaHQ recorded Oct 13, 2026	10001+	3,467 contacts →
	Exact match “Julius Berger Nigeria Plc is a leading construction company offering integrated construction solutions and related services.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2	Mckinstry	Exact match	Seattle, WA, United StatesHQ recorded Oct 13, 2026	1,001-5,000	2,293 contacts →
	Exact match “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Oct 13, 2026	1,001-5,000	2,206 contacts →
	Exact match “CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
4	DLR Group	Exact match	30 Offices, MN, United StatesHQ recorded Oct 13, 2026	1,001-5,000	2,039 contacts →
	Exact match “DLR Group is an integrated design firm delivering architecture, engineering, interiors, planning, and building optimization for new construction, renovation, and adaptive reuse.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
5	OLA	Exact match	Austin, TX, United StatesHQ recorded Oct 13, 2026	n/a	1,150 contacts →
	Exact match “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6	Mapa Group	Exact match	Ankara, TürkiyeHQ recorded Oct 13, 2026	10001+	1,055 contacts →
	Exact match “Mapa Group has emerged as a global leader in the engineering and construction industry, now spanning three continents.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
7	TSE	Exact match	São Paulo/sp, BrazilHQ recorded Oct 13, 2026	5,001-10,000	1,035 contacts →
	Exact match “Somos a TSE - Total Sustainable Engineering.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8	VAN Dorp	Exact match	Zoetermeer, NetherlandsHQ recorded Oct 13, 2026	1,001-5,000	897 contacts →
	Exact match “Bij Van Dorp zijn wij ervan doordrongen dat wij de wereld niet voor onszelf hebben.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
9	Archetype Group	Exact match	Ho Chi Minh City, VietnamHQ recorded Oct 13, 2026	1,001-5,000	863 contacts →
	Exact match “Archetype Group is a leading international construction consultancy company, we are shaping buildings that last with a full range of consulting services: Architecture & Master…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
10	Syska Hennessy Group	Exact match	New York, United StatesHQ recorded Oct 13, 2026	501-1,000	835 contacts →
	Exact match “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11	PAE	Exact match	Portland, OR, United StatesHQ recorded Oct 13, 2026	201-500	835 contacts →
	Exact match “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
12	Introba	Exact match	St. Louis, MO, United StatesHQ recorded Oct 13, 2026	1,001-5,000	816 contacts →
	Exact match “Introba is one of the world’s largest building engineering and consulting firms with more than employees in offices across the United States, Canada, the United Kingdom, Serbia…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13	Losinger Marazzi SA	Exact match	Berne, SwitzerlandHQ recorded Oct 13, 2026	501-1,000	723 contacts →
	Exact match “Losinger Marazzi AG – Building for life Als Pionierin des Schweizer Bauwesens zeichnet sich Losinger Marazzi seit über einem Jahrhundert durch ihre Innovationsfähigkeit aus.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14	Vanderweil Engineers	Exact match	Boston, MA, United StatesHQ recorded Oct 13, 2026	201-500	562 contacts →
	Exact match “Vanderweil is a mechanical, electrical, plumbing, fire protection, technology, sustainability, commissioning, and power engineering firm dedicated to providing customized and…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15	U.S. Green Building Council	Exact match	Washington, DC, United StatesHQ recorded Oct 13, 2026	201-500	545 contacts →
	Exact match “The U.S.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16	Sitelogiq	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 13, 2026	501-1,000	491 contacts →
	Exact match “SitelogIQ provides design, engineering, and construction management services that help organizations nationwide modernize their facilities and infrastructure.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17	Noresco	Exact match	Westborough, MA, United StatesHQ recorded Oct 13, 2026	201-500	479 contacts →
	Exact match “NORESCO, an OPTERRA company, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18	Korra Energi	Exact match	Cairo, EgyptHQ recorded Oct 13, 2026	1,001-5,000	476 contacts →
	Exact match “Korra Energi is a proud Egyptian leader in energy efficiency and construction services, backed by over 25 years of expertise and a vision of "Growth and Prosperity"(إعمار الأرض).” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
19	ADP Consulting	Exact match	Melbourne, AustraliaHQ recorded Oct 13, 2026	201-500	460 contacts →
	Exact match “ADP Consulting, an Ayesa company, is a sustainability-led engineering consultancy on a quest to inspire a better world through influence and design.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20	Hanab Installation Technology	Exact match	Vianen, NetherlandsHQ recorded Oct 13, 2026	501-1,000	455 contacts →
	Exact match “Hanab Installation Technology maakt toekomstbestendige gebouwen en woningen met een gezond binnenklimaat.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21	AESG	Exact match	London, United Arab EmiratesHQ recorded Oct 13, 2026	201-500	418 contacts →
	Exact match “AESG is an international Consultancy, Engineering and Advisory firm committed to driving sustainability in the built environment and beyond.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22	Arcxis	Exact match	Houston, TX, United StatesHQ recorded Oct 13, 2026	501-1,000	392 contacts →
	Exact match “ARCXIS (Formerly DPIS Builder Services), is the largest provider of HERS inspections, ENERGY STAR ratings, engineering and design, construction quality assurance and other builder…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23	IES LTD	Exact match	Glasgow, United KingdomHQ recorded Oct 13, 2026	201-500	385 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
24	P2s	Exact match	Long Beach, CA, United StatesHQ recorded Oct 13, 2026	201-500	381 contacts →
	Exact match “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25	LEMAY	Exact match	Montréal, QC, CanadaHQ recorded Oct 13, 2026	201-500	373 contacts →
	Exact match “Architectes \| Créateurs de changement Depuis plus de 60 ans, nous visons à redessiner l’avenir à travers la conception d’espaces de vie et de possibilités.” Recorded in the RevenueBase company graph · Oct 13, 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 “green building and energy efficiency contractors”. 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 11,771 green building and energy efficiency contractors worldwide

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Green building and energy efficiency contractors worldwide at a glance

As of Oct 13, 2026

31.6%Verified-email coverage

10.0Average contacts per company

1-10Median size (employees)

1.0%Largest-city concentration · London

Oct 13, 2026Page data refreshed

Companies by employee count

1-10

7,450

11-50

3,297

51-200

748

201-500

137

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for green building and energy efficiency contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “green building and energy efficiency contractors” 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. 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 37,315 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 October 13, 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.

Green building and energy efficiency contractors by location

63 lists · largest first

Every Green building and energy efficiency contractors 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 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 “green building and energy efficiency contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many green building and energy efficiency contractors are there worldwide?

RevenueBase identified 11,771 company matches for green building and energy efficiency contractors worldwide as of October 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?

Julius Berger Nigeria PLC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most green building and energy efficiency contractors?

The United States leads with 2,656 companies, followed by Germany (667) and France (649). Every green building and energy efficiency contractors list by country and city is linked on this page.

Which city has the most green building and energy efficiency contractors?

London leads with 121 company records, followed by New York (93) and Paris (87).

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 37,315 professional contacts with verified work emails tracked across these 11,771 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 October 13, 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.