Company lists · Data refreshed September 2026

Top 25 Sustainable architecture firms based in the United States

Name: Sustainable architecture firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 4,631 companies tracked

RevenueBase identified 4,631 sustainable architecture firms headquartered in the United States as of September 2026 and tracks 73,021 professional contacts across them, including 35,476 with verified work emails. New York is the largest hub.

This list covers sustainable architecture firms headquartered in the United States, 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.

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

4,631Companies

73,021Contacts tracked

35,476Verified emails

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The 25 largest sustainable architecture firms based in the United States

Ranked by team size

Top 25 of 4,631 sustainable architecture firms based in the United States, 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	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
2	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	Little Diversified Architectural Consulting	Partial evidence	Little Global, VA, United StatesHQ checked Sep 18, 2026	201-500	509 contacts →
	Partial evidence “At Little, we deliver results far beyond architecture-results you wouldn’t expect from an architectural firm.” Source: RevenueBase Database · checked Sep 18, 2026
14	Sitelogiq	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 18, 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 18, 2026
15	Estudio Architecture	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	n/a	390 contacts →
	Partial evidence “eStudio is a specialized full service architectural and boutique design firm.” Source: RevenueBase Database · checked Sep 18, 2026
16	Pike Construction Services	Indirect evidence	Rochester, NY, United StatesHQ checked Sep 18, 2026	501-1,000	387 contacts →
	Indirect evidence “When it comes to your building needs, it’s not enough to find a construction company that gets the job done.” Source: RevenueBase Database · checked Sep 18, 2026
17	P2s	Partial evidence	Long Beach, CA, United StatesHQ checked Sep 18, 2026	201-500	375 contacts →
	Partial 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 18, 2026
18	Newcomb & Boyd, LLP	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 18, 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 18, 2026
19	RTKL	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 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 18, 2026
20	SCB	Partial evidence	Chicago, IL, United StatesHQ checked Sep 18, 2026	201-500	343 contacts →
	Partial evidence “SCB is an architecture, planning, interior and urban design firm.” Source: RevenueBase Database · checked Sep 18, 2026
21	Performance Services	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 18, 2026	201-500	328 contacts →
	Indirect evidence “We design and construct high-performing buildings and systems.” Source: RevenueBase Database · checked Sep 18, 2026
22	MBH Architects	Partial evidence	Alameda, CA, United StatesHQ checked Sep 18, 2026	201-500	319 contacts →
	Partial evidence “MBH Architects is a full-service architectural firm headquartered in a LEED Gold office in the San Francisco Bay Area with offices in New York City, Denver, Mumbai, and Bengaluru.” Source: RevenueBase Database · checked Sep 18, 2026
23	Cosentini Associates	Indirect evidence	Nyc, NY, United StatesHQ checked Sep 18, 2026	201-500	306 contacts →
	Indirect evidence “Cosentini has a 70+ year history of engineering many of the world’s most iconic buildings.” Source: RevenueBase Database · checked Sep 18, 2026
24	VLK	Partial evidence	Fort Worth, TX, United StatesHQ checked Sep 18, 2026	201-500	297 contacts →
	Partial evidence “VLK designs exemplary environments, innovative structures, and sustainable communities for tomorrow.” Source: RevenueBase Database · checked Sep 18, 2026
25	FGM Architects	Indirect evidence	Westchester, IL, United StatesHQ checked Sep 18, 2026	201-500	295 contacts →
	Indirect evidence “At FGMA, we design spaces for learning, protecting and connecting to fortify a thriving society.” 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 4,631 sustainable architecture firms based in the United States

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Sustainable architecture firms based in the United States at a glance

As of Sep 18, 2026

48.6%Verified-email coverage

15.8Average contacts per company

1-10Median size (employees)

6.1%Largest-city concentration · New York

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

3,090

11-50

1,277

51-200

207

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,631 companies.

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.
What qualifies: Companies headquartered in the United States 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. Companies headquartered outside United States are excluded even when they keep an office there.
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, 35,476 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 metro

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 based in the United States?

RevenueBase identified 4,631 sustainable architecture firms headquartered in the United States 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?

Perkins&will, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most sustainable architecture firms?

New York leads with 282 headquartered companies, followed by Los Angeles (131) and Seattle (128).

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 35,476 verified decision-maker contacts tracked across these 4,631 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.