Company lists · Data refreshed September 2026

Top 25 Environmental design firms worldwide

Name: Environmental design firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 44,749 companies tracked

RevenueBase identified 44,749 environmental design firms worldwide as of September 2026 and tracks 492,202 professional contacts across them, including 185,781 with verified work emails. The United States is the largest market and New York the largest hub.

This list covers environmental design firms 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 19, 2026. Country and city lists for environmental design firms 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 19, 2026 86% judged on-target in blind review

44,749Companies

492,202Contacts tracked

185,781Verified emails

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The 25 largest environmental design firms worldwide

Ranked by team size

Top 25 of 44,749 environmental design firms worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to environmental design firms: 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	Stantec	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 19, 2026	10001+	28,416 contacts →
	Indirect evidence “Stantec empowers clients, people, and communities to rise to the world’s greatest challenges at a time when the world faces more unprecedented concerns than ever before.” Source: RevenueBase Database · checked Sep 19, 2026
2	WSP In The U.S	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	10001+	9,318 contacts →
	Partial evidence “What if you could shape built and natural environments – and the future of those that use them?” Source: RevenueBase Database · checked Sep 19, 2026
3	Golder	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 19, 2026	5,001-10,000	3,167 contacts →
	Indirect evidence “Golder was acquired by WSP.” Source: RevenueBase Database · checked Sep 19, 2026
4	Perkins&will	Partial evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,958 contacts →
	Partial evidence “Since 1935, we’ve believed that design has the power to make the world a better, more beautiful place.” Source: RevenueBase Database · checked Sep 19, 2026
5	HOK	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,614 contacts →
	Partial evidence “HOK is a global interdisciplinary design firm.” Source: RevenueBase Database · checked Sep 19, 2026
6	Hks, INC	Partial evidence	Dallas, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,462 contacts →
	Partial evidence “We are a global firm of architects, designers, planners and advisors who create places noted for their beauty and performance.” Source: RevenueBase Database · checked Sep 19, 2026
7	DLR Group	Partial evidence	30 Offices, MN, United StatesHQ checked Sep 19, 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 19, 2026
8	IMEG	Indirect evidence	Rock Island, IL, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,985 contacts →
	Indirect evidence “Leaders in Engineering and Innovation.” Source: RevenueBase Database · checked Sep 19, 2026
9	Skidmore, Owings & Merrill SOM	Strong evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,967 contacts →
	Strong evidence “Skidmore, Owings & Merrill (SOM) is a global practice of architects, designers, engineers, and planners, responsible for some of the world’s most technically and environmentally…” Source: RevenueBase Database · checked Sep 19, 2026
10	Smithgroup	Partial evidence	Detroit, MI, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,849 contacts →
	Partial evidence “SmithGroup is an award-winning, multi-national integrated design firm that employs research, data, advanced technologies and design thinking to help clients solve their greatest…” Source: RevenueBase Database · checked Sep 19, 2026
11	IBI Group	Partial evidence	Amsterdam, ON, NetherlandsHQ checked Sep 19, 2026	1,001-5,000	1,682 contacts →
	Partial evidence “IBI Group is a technology-driven design firm with global architecture, engineering, planning and technology expertise.” Source: RevenueBase Database · checked Sep 19, 2026
12	Swca Environmental Consultants	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,629 contacts →
	Partial evidence “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Source: RevenueBase Database · checked Sep 19, 2026
13	IA Interior Architects	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	501-1,000	1,584 contacts →
	Partial evidence “Celebrating 40 years of visionary design and innovation, IA Interior Architects is the first global architecture firm focused exclusively on interiors.” Source: RevenueBase Database · checked Sep 19, 2026
14	HGA	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,543 contacts →
	Partial evidence “HGA is a national interdisciplinary design firm committed to making a positive, lasting impact for our clients and communities through research-based, holistic solutions.” Source: RevenueBase Database · checked Sep 19, 2026
15	Corgan	Partial evidence	Dallas, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,414 contacts →
	Partial evidence “Corgan is an employee-owned architecture and design firm with 22 locations and more than 1,300 team members globally.” Source: RevenueBase Database · checked Sep 19, 2026
16	HBA Hirsch Bedner Associates	Partial evidence	SingaporeHQ checked Sep 19, 2026	1,001-5,000	1,329 contacts →
	Partial evidence “Founded in 1965 by Howard Hirsch and Michael Bedner, HBA (Hirsch Bedner Associates) believes in the power of great design.” Source: RevenueBase Database · checked Sep 19, 2026
17	PAGE	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,191 contacts →
	Partial evidence “Performance by Design.” Source: RevenueBase Database · checked Sep 19, 2026
18	OLA	Partial evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	n/a	1,145 contacts →
	Partial 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 19, 2026
19	Perkins Eastman	Strong evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,083 contacts →
	Strong evidence “Perkins Eastman is a global design practice founded on the belief that design has the power to enhance people’s lives and safeguard the environment.” Source: RevenueBase Database · checked Sep 19, 2026
20	TSE	Indirect evidence	São Paulo/sp, BrazilHQ checked Sep 19, 2026	5,001-10,000	1,067 contacts →
	Indirect evidence “Somos a TSE - Total Sustainable Engineering.” Source: RevenueBase Database · checked Sep 19, 2026
21	Braun Intertec Corporation	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,065 contacts →
	Partial evidence “At Braun Intertec, we work at the intersection of the natural and built environments, combining science, technology, and engineering.” Source: RevenueBase Database · checked Sep 19, 2026
22	Athié Wohnrath	Indirect evidence	São Paulo, BrazilHQ checked Sep 19, 2026	501-1,000	1,062 contacts →
	Indirect evidence “Para nós do Grupo a\|w, projetos impactantes são aqueles que traduzem o jeito de ser das pessoas e os valores das empresas.” Source: RevenueBase Database · checked Sep 19, 2026
23	Terideal	Indirect evidence	Wissous, FranceHQ checked Sep 19, 2026	1,001-5,000	1,016 contacts →
	Indirect evidence “Terideal se démarque depuis plus de 50 ans sur le marché de l’aménagement des territoires.” Source: RevenueBase Database · checked Sep 19, 2026
24	Ware Malcomb	Partial evidence	International Design Firm, United StatesHQ checked Sep 19, 2026	501-1,000	992 contacts →
	Partial evidence “Established in 1972, Ware Malcomb is a dynamic, forward-thinking design firm offering streamlined architecture, interior design, branding, and engineering services across the…” Source: RevenueBase Database · checked Sep 19, 2026
25	IEA	Partial evidence	Brooklyn Park, MN, United StatesHQ checked Sep 19, 2026	n/a	982 contacts →
	Partial evidence “The Institute for Environmental Assessment, Inc.(IEA) is small business committed to providing trusted environmental safety consulting services for private and public…” Source: RevenueBase Database · checked Sep 19, 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: environmental design firms. 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 environmental design firms.
Partial evidence: Its own public description names part of environmental design firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental design firms. 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 44,749 environmental design firms worldwide

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Environmental design firms worldwide at a glance

As of Sep 19, 2026

37.7%Verified-email coverage

11.0Average contacts per company

1-10Median size (employees)

1.2%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

29,247

11-50

12,019

51-200

2,458

201-500

498

501-1,000

125

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 environmental design firms, 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: Every country. Country and city lists for environmental design firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “environmental design firms”. 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 environmental design firms), 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 environmental design firms, 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, 185,781 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 19, 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.

Environmental design firms by location

193 lists · largest first

Every Environmental design firms 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 environmental design firms, 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 environmental design firms are there worldwide?

RevenueBase identified 44,749 environmental design firms 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?

Stantec, headquartered in Edmonton, tops this list with the largest team on record.

Which country has the most environmental design firms?

The United States leads with 12,004 companies, followed by India (3,748) and France (2,208). Every environmental design firms list by country and city is linked on this page.

Which city has the most environmental design firms?

New York leads with 553 headquartered companies, followed by London (503) and Sao Paulo (330).

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 185,781 verified decision-maker contacts tracked across these 44,749 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 19, 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.