Company lists · Data refreshed September 2026

Top 25 Sustainable architecture companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 13,335 companies tracked

RevenueBase identified 13,335 sustainable architecture companies worldwide as of September 2026 and tracks 133,860 professional contacts across them, including 45,466 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 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 sustainable architecture 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

13,335Companies

133,860Contacts tracked

45,466Verified emails

0Mobile numbers

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The 25 largest sustainable architecture companies worldwide

Ranked by team size

Top 25 of 13,335 sustainable architecture companies worldwide, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable architecture 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	Ramboll	Partial evidence	Copenhagen, DenmarkHQ checked Sep 16, 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 16, 2026
2	Foster Partners	Strong evidence	London, United KingdomHQ checked Sep 16, 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 16, 2026
3	HOK	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,614 contacts →
	Indirect evidence “HOK is a global interdisciplinary design firm.” Source: RevenueBase Database · checked Sep 16, 2026
4	Hks, INC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 16, 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 16, 2026
5	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
6	OLA	Partial evidence	Austin, TX, United StatesHQ checked Sep 16, 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 16, 2026
7	Perkins Eastman	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,083 contacts →
	Indirect 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 16, 2026
8	TSE	Partial evidence	São Paulo/sp, BrazilHQ checked Sep 16, 2026	5,001-10,000	1,067 contacts →
	Partial evidence “Somos a TSE - Total Sustainable Engineering.” Source: RevenueBase Database · checked Sep 16, 2026
9	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
10	NORR	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 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 16, 2026
11	ZGF Architects	Indirect evidence	Portland, OR, United StatesHQ checked Sep 16, 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 16, 2026
12	Lpa, INC	Partial evidence	Irvine, CA, United StatesHQ checked Sep 16, 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 16, 2026
13	Losinger Marazzi SA	Indirect evidence	Berne, SwitzerlandHQ checked Sep 16, 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 16, 2026
14	AIA Life Designers	Partial evidence	Paris, FranceHQ checked Sep 16, 2026	501-1,000	572 contacts →
	Partial evidence “Depuis 1965, AIA Life Designers porte la vision d’une architecture engagée pour le bien-être, l’environnement et la santé, qui fédère au sein d’une même structure les métiers…” Source: RevenueBase Database · checked Sep 16, 2026
15	Hanab Installation Technology	Indirect evidence	Vianen, NetherlandsHQ checked Sep 16, 2026	501-1,000	471 contacts →
	Indirect evidence “Hanab Installation Technology maakt toekomstbestendige gebouwen en woningen met een gezond binnenklimaat.” Source: RevenueBase Database · checked Sep 16, 2026
16	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
17	Callisonrtkl	Partial evidence	Amsterdam, DC, NetherlandsHQ checked Sep 16, 2026	1,001-5,000	452 contacts →
	Partial evidence “CRTKL has now joined Arcadis, a global leader in the delivery of sustainable design, engineering and consultancy solutions for natural and built assets.” Source: RevenueBase Database · checked Sep 16, 2026
18	Tengbom	Indirect evidence	Stockholm, SwedenHQ checked Sep 16, 2026	201-500	417 contacts →
	Indirect evidence “Tengbom är ett av Nordens ledande arkitektföretag.” Source: RevenueBase Database · checked Sep 16, 2026
19	Sheppard Robson	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	391 contacts →
	Indirect evidence “Sheppard Robson is an ever-evolving collective of architects, interior designers and masterplanners.” Source: RevenueBase Database · checked Sep 16, 2026
20	Estudio Architecture	Partial evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	n/a	390 contacts →
	Partial evidence “eStudio is a specialized full service architectural and boutique design firm.” Source: RevenueBase Database · checked Sep 16, 2026
21	LEMAY	Indirect evidence	Montréal, QC, CanadaHQ checked Sep 16, 2026	201-500	373 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
22	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
23	RTKL	Partial evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	1,001-5,000	351 contacts →
	Partial evidence “CRTKL has now joined Arcadis, a global leader in the delivery of sustainable design, engineering and consultancy solutions for natural and built assets.” Source: RevenueBase Database · checked Sep 16, 2026
24	Morphogenesis	Strong evidence	New Delhi, IndiaHQ checked Sep 16, 2026	201-500	348 contacts →
	Strong evidence “Morphogenesis is a leading design and consulting firm operating at the intersection of architecture, urban planning, and sustainability, with a Pan-India presence.” Source: RevenueBase Database · checked Sep 16, 2026
25	GMP VON Gerkan, Marg And Partners Architects	Partial evidence	Hamburg, GermanyHQ checked Sep 16, 2026	501-1,000	345 contacts →
	Partial evidence “Legal notice: The architects von Gerkan, Marg and Partners (gmp) are an architectural practice that was founded in Hamburg and has branches worldwide.” 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: sustainable architecture 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 sustainable architecture companies.
Partial evidence: Its own public description names part of sustainable architecture companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable architecture 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 13,335 sustainable architecture companies worldwide

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Sustainable architecture companies worldwide at a glance

As of Sep 16, 2026

34.0%Verified-email coverage

10.0Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

9,382

11-50

3,168

51-200

533

201-500

109

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 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: 40 countries, largest first: the United States, India, the United Kingdom, France, Germany, Spain, Italy, Australia, the Netherlands, Brazil and 30 more. Country and city lists for sustainable architecture companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “sustainable architecture 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 sustainable architecture 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 sustainable architecture 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, 45,466 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.

Sustainable architecture companies by location

69 lists · largest first

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

RevenueBase identified 13,335 sustainable architecture 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?

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

Which country has the most sustainable architecture companies?

The United States leads with 2,333 companies, followed by India (1,265) and the United Kingdom (1,102). Every sustainable architecture companies list by country and city is linked on this page.

Which city has the most sustainable architecture companies?

London leads with 328 headquartered companies, followed by Paris (203) and New York (141).

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 45,466 verified decision-maker contacts tracked across these 13,335 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.