Company lists · Data refreshed September 2026

Top 25 Energy efficient building companies worldwide

Name: Energy efficient building companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 10,465 companies tracked

RevenueBase identified 10,465 energy efficient building companies worldwide as of September 2026 and tracks 86,124 professional contacts across them, including 32,335 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers energy efficient building companies 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 energy efficient building companies 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

10,465Companies

86,124Contacts tracked

32,335Verified emails

0Mobile numbers

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The 25 largest energy efficient building companies worldwide

Ranked by team size

Top 25 of 10,465 energy efficient building companies worldwide, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy efficient building companies: 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	Mckinstry	Partial evidence	Seattle, WA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,213 contacts →
	Partial 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
2	DLR Group	Partial evidence	30 Offices, MN, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,992 contacts →
	Partial evidence “DLR Group is an integrated design firm delivering architecture, engineering, interiors, planning, and building optimization for new construction, renovation, and adaptive reuse.” 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	KPF	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	501-1,000	970 contacts →
	Indirect evidence “KPF is dedicated to transforming cities through impactful design, collaborating closely with the world’s most forward-thinking clients to create high performing, carefully crafted…” Source: RevenueBase Database · checked Sep 16, 2026
5	Introba	Partial evidence	St Louis, MO, United StatesHQ checked Sep 16, 2026	1,001-5,000	822 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
6	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
7	PAE	Partial evidence	Portland, OR, United StatesHQ checked Sep 16, 2026	201-500	744 contacts →
	Partial evidence “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Source: RevenueBase Database · checked Sep 16, 2026
8	Little Diversified Architectural Consulting	Indirect evidence	Little Global, VA, United StatesHQ checked Sep 16, 2026	201-500	509 contacts →
	Indirect evidence “At Little, we deliver results far beyond architecture-results you wouldn’t expect from an architectural firm.” Source: RevenueBase Database · checked Sep 16, 2026
9	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
10	Estudio Architecture	Indirect evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	n/a	390 contacts →
	Indirect evidence “eStudio is a specialized full service architectural and boutique design firm.” Source: RevenueBase Database · checked Sep 16, 2026
11	Arcxis	Partial evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	501-1,000	389 contacts →
	Partial 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
12	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
13	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
14	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
15	Newcomb & Boyd, LLP	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 16, 2026	201-500	363 contacts →
	Indirect evidence “We help clients design and operate facilities that remain resilient, reliable, and ready for what's next.” Source: RevenueBase Database · checked Sep 16, 2026
16	Wendel Companies	Strong evidence	Williamsville, NY, United StatesHQ checked Sep 16, 2026	201-500	355 contacts →
	Strong 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
17	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
18	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
19	Diamond Schmitt	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	201-500	325 contacts →
	Partial evidence “Diamond Schmitt is a global architecture firm designing transformative, purpose-driven, and highly sustainable buildings from its four studios located in Toronto, Vancouver, and…” Source: RevenueBase Database · checked Sep 16, 2026
20	Atelier TEN	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	323 contacts →
	Partial 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
21	Cosentini Associates	Partial evidence	Nyc, NY, United StatesHQ checked Sep 16, 2026	201-500	306 contacts →
	Partial evidence “Cosentini has a 70+ year history of engineering many of the world’s most iconic buildings.” Source: RevenueBase Database · checked Sep 16, 2026
22	VLK	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 16, 2026	201-500	297 contacts →
	Indirect evidence “VLK designs exemplary environments, innovative structures, and sustainable communities for tomorrow.” Source: RevenueBase Database · checked Sep 16, 2026
23	EFFY	Partial evidence	Paris, FranceHQ checked Sep 16, 2026	201-500	292 contacts →
	Partial evidence “Effy, spécialiste de l’efficience énergétique.” Source: RevenueBase Database · checked Sep 16, 2026
24	Jayman Built	Strong evidence	Calgary, AB, CanadaHQ checked Sep 16, 2026	201-500	280 contacts →
	Strong evidence “Jayman BUILT has been leading the home building industry in new home construction, sustainable building practices, and energy efficient design in the Calgary area for over 45…” Source: RevenueBase Database · checked Sep 16, 2026
25	Trecobat Groupe	Indirect evidence	Lannilis, FranceHQ checked Sep 16, 2026	201-500	267 contacts →
	Indirect evidence “Créé en 1972 par Marcel Tréguer, le Groupe Trécobat est le leader la maison BBC (Bâtiment Basse Consommation).” 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: energy efficient building companies. 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 energy efficient building companies.
Partial evidence: Its own public description names part of energy efficient building companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficient building companies. 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 10,465 energy efficient building companies worldwide

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Energy efficient building companies worldwide at a glance

As of Sep 16, 2026

37.5%Verified-email coverage

8.2Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

7,210

11-50

2,576

51-200

460

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 energy efficient building companies, 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: 33 countries, largest first: the United States, Germany, France, the United Kingdom, Italy, India, Spain, the Netherlands, Canada, Australia and 23 more. Country and city lists for energy efficient building companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “energy efficient building companies”. 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 energy efficient building companies), 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 energy efficient building companies, 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, 32,335 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.

Energy efficient building companies by location

54 lists · largest first

Every Energy efficient building companies 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 energy efficient building companies, 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 energy efficient building companies are there worldwide?

RevenueBase identified 10,465 energy efficient building companies 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?

Mckinstry, headquartered in Seattle, tops this list with the largest team on record.

Which country has the most energy efficient building companies?

The United States leads with 2,258 companies, followed by Germany (1,096) and France (841). Every energy efficient building companies list by country and city is linked on this page.

Which city has the most energy efficient building companies?

London leads with 181 headquartered companies, followed by New York (115) and Paris (107).

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 32,335 verified decision-maker contacts tracked across these 10,465 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.