Company lists · Data refreshed September 2026

Top 25 Sustainable architecture firms worldwide

Name: Sustainable architecture firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 21,183 companies tracked

RevenueBase identified 21,183 sustainable architecture firms worldwide as of September 2026 and tracks 232,009 professional contacts across them, including 81,020 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers sustainable architecture 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 18, 2026. Country and city lists for sustainable architecture 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 18, 2026 86% judged on-target in blind review

21,183Companies

232,009Contacts tracked

81,020Verified emails

0Mobile numbers

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The 25 largest sustainable architecture firms worldwide

Ranked by team size

Top 25 of 21,183 sustainable architecture firms worldwide, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable architecture 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	Ramboll	Partial evidence	Copenhagen, DenmarkHQ checked Sep 18, 2026	10001+	15,715 contacts →
	Partial evidence “Ramboll is a global architecture, engineering and consultancy company founded in Denmark in 1945.” Source: RevenueBase Database · checked Sep 18, 2026
2	Perkins&will	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 18, 2026	1,001-5,000	2,958 contacts →
	Indirect 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 18, 2026
3	Foster Partners	Strong evidence	London, United KingdomHQ checked Sep 18, 2026	1,001-5,000	2,869 contacts →
	Strong evidence “Foster + Partners is a global studio for architecture, urbanism and design, all rooted in sustainability and founded by Norman Foster in 1967.” Source: RevenueBase Database · checked Sep 18, 2026
4	HOK	Indirect evidence	New York, NY, United StatesHQ checked Sep 18, 2026	1,001-5,000	2,614 contacts →
	Indirect evidence “HOK is a global interdisciplinary design firm.” Source: RevenueBase Database · checked Sep 18, 2026
5	Hks, INC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 18, 2026	1,001-5,000	2,462 contacts →
	Indirect 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 18, 2026
6	Mckinstry	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 18, 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 18, 2026
7	DLR Group	Partial evidence	30 Offices, MN, United StatesHQ checked Sep 18, 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 18, 2026
8	YIT	Partial evidence	Helsinki, FinlandHQ checked Sep 18, 2026	1,001-5,000	1,969 contacts →
	Partial evidence “We build and develop sustainable living environments: functional and attractive homes, future-proof public and commercial buildings, infrastructure to support the green transition…” Source: RevenueBase Database · checked Sep 18, 2026
9	Skidmore, Owings & Merrill SOM	Indirect evidence	New York, NY, United StatesHQ checked Sep 18, 2026	1,001-5,000	1,967 contacts →
	Indirect 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 18, 2026
10	BAM Nederland	Partial evidence	Bunnik, NetherlandsHQ checked Sep 18, 2026	5,001-10,000	1,610 contacts →
	Partial evidence “Bij BAM Nederland bouwen we aan meer dan projecten: we bouwen aan een duurzame toekomst, geleid door onze missie Building a Sustainable Tomorrow.” Source: RevenueBase Database · checked Sep 18, 2026
11	OLA	Partial evidence	Austin, TX, United StatesHQ checked Sep 18, 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 18, 2026
12	TSE	Partial evidence	São Paulo/sp, BrazilHQ checked Sep 18, 2026	5,001-10,000	1,067 contacts →
	Partial evidence “Somos a TSE - Total Sustainable Engineering.” Source: RevenueBase Database · checked Sep 18, 2026
13	The Beck Group	Strong evidence	Dallas, TX, United StatesHQ checked Sep 18, 2026	501-1,000	1,054 contacts →
	Strong evidence “We integrate architecture, construction, sustainability, and technology to transform how our clients design and build.” Source: RevenueBase Database · checked Sep 18, 2026
14	KPF	Indirect evidence	New York, NY, United StatesHQ checked Sep 18, 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 18, 2026
15	Mapa Group	Indirect evidence	Ankara, TürkiyeHQ checked Sep 18, 2026	10001+	959 contacts →
	Indirect evidence “Mapa Group has emerged as a global leader in the engineering and construction industry, now spanning three continents.” Source: RevenueBase Database · checked Sep 18, 2026
16	NORR	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 18, 2026	501-1,000	907 contacts →
	Indirect evidence “NORR is a global team of 750 architects, engineers, planners, and interior designers creating design strategies and solutions that express the unique vision of every project.” Source: RevenueBase Database · checked Sep 18, 2026
17	VAN Dorp	Indirect evidence	Zoetermeer, NetherlandsHQ checked Sep 18, 2026	1,001-5,000	873 contacts →
	Indirect evidence “Bij Van Dorp zijn wij ervan doordrongen dat wij de wereld niet voor onszelf hebben.” Source: RevenueBase Database · checked Sep 18, 2026
18	B H Architects	Partial evidence	Toronto, ON, CanadaHQ checked Sep 18, 2026	201-500	843 contacts →
	Partial evidence “B+H Architects is a global, award-winning firm with a 70+ year legacy of building creative solutions for clients through the delivery of architecture, interior design, landscape…” Source: RevenueBase Database · checked Sep 18, 2026
19	ZGF Architects	Indirect evidence	Portland, OR, United StatesHQ checked Sep 18, 2026	501-1,000	829 contacts →
	Indirect evidence “With our origins in Oregon, attention to craft and beauty is elemental to the ZGF culture.” Source: RevenueBase Database · checked Sep 18, 2026
20	Nbbj Design	Partial evidence	Seattle, WA, United StatesHQ checked Sep 18, 2026	501-1,000	808 contacts →
	Partial evidence “NBBJ is an ideas-driven architecture and design firm dedicated to creating connected communities, healthier buildings and a more resilient environment.” Source: RevenueBase Database · checked Sep 18, 2026
21	Archetype Group	Partial evidence	Ho Chi Minh City, VietnamHQ checked Sep 18, 2026	1,001-5,000	801 contacts →
	Partial evidence “Archetype Group is a leading international construction consultancy company, we are shaping buildings that last with a full range of consulting services: Architecture & Master…” Source: RevenueBase Database · checked Sep 18, 2026
22	Lpa, INC	Partial evidence	Irvine, CA, United StatesHQ checked Sep 18, 2026	501-1,000	728 contacts →
	Partial evidence “Since LPA was founded in 1965, it's been our mission to deliver timeless, sustainable designs that benefit the environment, generate lasting value, enrich the human experience and…” Source: RevenueBase Database · checked Sep 18, 2026
23	Losinger Marazzi SA	Indirect evidence	Berne, SwitzerlandHQ checked Sep 18, 2026	501-1,000	701 contacts →
	Indirect evidence “Losinger Marazzi AG – Building for life Als Pionierin des Schweizer Bauwesens zeichnet sich Losinger Marazzi seit über einem Jahrhundert durch ihre Innovationsfähigkeit aus.” Source: RevenueBase Database · checked Sep 18, 2026
24	RIO Verde Engenharia	Indirect evidence	Campinas, BrazilHQ checked Sep 18, 2026	1,001-5,000	635 contacts →
	Indirect evidence “O Grupo Rio Verde possui mais de 40 anos de experiência e atua nas áreas de Engenharia, Incorporação Imobiliária e Concessões.” Source: RevenueBase Database · checked Sep 18, 2026
25	Henning Larsen	Indirect evidence	Copenhagen V, United StatesHQ checked Sep 18, 2026	501-1,000	629 contacts →
	Indirect evidence “As an experienced studio with a global presence, a balance of hands-on capabilities and artistic sensitivity is at the core of our design language.” Source: RevenueBase Database · checked Sep 18, 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: sustainable architecture 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 sustainable architecture firms.
Partial evidence: Its own public description names part of sustainable architecture firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable architecture 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 21,183 sustainable architecture firms worldwide

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Sustainable architecture firms worldwide at a glance

As of Sep 18, 2026

34.9%Verified-email coverage

11.0Average contacts per company

1-10Median size (employees)

2.1%Largest-city concentration · London

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

14,266

11-50

5,424

51-200

1,025

201-500

208

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 sustainable architecture 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: 46 countries, largest first: the United States, India, the United Kingdom, Germany, France, Spain, Brazil, Italy, Australia, the Netherlands and 36 more. Country and city lists for sustainable architecture firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “sustainable architecture 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 sustainable architecture 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 sustainable architecture 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, 81,020 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 18, 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.

Sustainable architecture firms by location

103 lists · largest first

Every Sustainable architecture 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 sustainable architecture 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 sustainable architecture firms are there worldwide?

RevenueBase identified 21,183 sustainable architecture 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?

Ramboll, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most sustainable architecture firms?

The United States leads with 4,631 companies, followed by India (1,963) and the United Kingdom (1,455). Every sustainable architecture firms list by country and city is linked on this page.

Which city has the most sustainable architecture firms?

London leads with 437 headquartered companies, followed by New York (282) and Paris (250).

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 81,020 verified decision-maker contacts tracked across these 21,183 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 18, 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.