Company lists · Data refreshed September 2026

Top 25 Sustainable design consultants based in Washington, United States

Name: Sustainable design consultants based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 77 companies tracked

RevenueBase identified 77 sustainable design consultants headquartered in Washington, United States as of September 2026 and tracks 1,109 professional contacts across them, including 348 with verified work emails. New York is the largest hub.

This list covers sustainable design consultants headquartered in Washington, 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 22, 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 22, 2026 86% judged on-target in blind review

77Companies

1,109Contacts tracked

348Verified emails

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The 25 largest sustainable design consultants based in Washington, United States

Ranked by team size

Top 25 of 77 sustainable design consultants based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable design consultants: 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	RTKL	Strong evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	1,001-5,000	351 contacts →
	Strong 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 22, 2026
2	Setty & Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	201-500	220 contacts →
	Indirect evidence “Established in 1984, SETTY is headquartered in Fairfax, VA, with offices in Atlanta, GA, Baltimore, MD, Charlottesville, VA, Fairfax, VA, Los Angeles, CA, New York, NY…” Source: RevenueBase Database · checked Sep 22, 2026
3	Shalom Baranes Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	51-200	84 contacts →
	Indirect evidence “Shalom Baranes Associates (SBA) is a Washington, DC architectural firm with an acclaimed reputation for its expertise in residential, commercial, institutional, and governmental…” Source: RevenueBase Database · checked Sep 22, 2026
4	Peer Consultants, P.C	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	51-200	71 contacts →
	Indirect evidence “In 1978, PEER was established under Dr.” Source: RevenueBase Database · checked Sep 22, 2026
5	Baumann Consulting	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	51-200	63 contacts →
	Indirect evidence “Baumann Consulting is driven to deliver solutions for a carbon-neutral real estate industry.” Source: RevenueBase Database · checked Sep 22, 2026
6	Northbridge	Indirect evidence	Washington, United StatesHQ checked Sep 22, 2026	11-50	24 contacts →
	Indirect evidence “At Northbridge, we provide our clients with the tools and expertise to help solve complex financial, policy, and environmental challenges.” Source: RevenueBase Database · checked Sep 22, 2026
7	North Arrow, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	22 contacts →
	Indirect evidence “DUNS Number: 08-001-8268 CAGE Code: 7GN69 SBA Certified Small Business District of Columbia Certified Business Enterprise (CBE) Metropolitan Washington Airports Authority Local…” Source: RevenueBase Database · checked Sep 22, 2026
8	Fillat Architecture	Partial evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	20 contacts →
	Partial evidence “FILLAT+ is a design studio headquartered in Washington, DC with offices in Baltimore, New York and San Diego.” Source: RevenueBase Database · checked Sep 22, 2026
9	The Clark Group LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	19 contacts →
	Indirect evidence “The Clark Group is an environmental policy consulting firm that provides a broad range of services to government, private and nonprofit clients.” Source: RevenueBase Database · checked Sep 22, 2026
10	Bell Architects, PC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	16 contacts →
	Indirect evidence “BELL Architects' works closely with communities to create places where people want to be.” Source: RevenueBase Database · checked Sep 22, 2026
11	Numark Associates, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	15 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
12	Co2efficient	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	1-10	14 contacts →
	Indirect evidence “CO2EFFICIENT LLC (COEFFICIENT) was founded in 2017 as a mission-focused Washington, D.C.” Source: RevenueBase Database · checked Sep 22, 2026
13	Sustainable YOU	Partial evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	51-200	14 contacts →
	Partial evidence “Sustainable You is a national strategic consulting firm in solar and sustainability serving residential and small commercial clients with a focus in the DC, Maryland and Virginia…” Source: RevenueBase Database · checked Sep 22, 2026
14	LEE And Associates, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	12 contacts →
	Partial evidence “lee and associates, inc (lai) is a respected and highly responsive firm offering planning and design professional services as it relates to how man relates to the land and the…” Source: RevenueBase Database · checked Sep 22, 2026
15	Green Strategies, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	1-10	8 contacts →
	Indirect evidence “Green Strategies Inc.” Source: RevenueBase Database · checked Sep 22, 2026
16	Bhi- Construction & Real Estate Development	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	8 contacts →
	Indirect evidence “BHI Construction & Real Estate Development helps owners plan, protect, and deliver complex real estate, capital improvement, and construction projects.” Source: RevenueBase Database · checked Sep 22, 2026
17	The Climate Board	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	7 contacts →
	Indirect evidence “The Climate Board builds AI-enhanced data products for corporate climate teams, closing the gap between infrequent assessments and real-time risk.” Source: RevenueBase Database · checked Sep 22, 2026
18	SORG	Partial evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	7 contacts →
	Partial evidence “Sorg is a full-service, international design firm offering architectural design services as well as programming, interior design, and construction management that was established…” Source: RevenueBase Database · checked Sep 22, 2026
19	Partnership International, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	7 contacts →
	Indirect evidence “Partnership International, Inc, founded in 1990, is an international consulting firm that provides socio-economic, regulatory, institutional, technical, commercial and financial…” Source: RevenueBase Database · checked Sep 22, 2026
20	Green Capitol	Partial evidence	Washington, United StatesHQ checked Sep 22, 2026	1-10	7 contacts →
	Partial evidence “Green Capitol LLC works on sustainable development policy at the state, federal and international levels, serving clients on agriculture, energy and environment concerns via…” Source: RevenueBase Database · checked Sep 22, 2026
21	Heller & Metzger, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	1-10	6 contacts →
	Indirect evidence “Founded in 1982, Heller & Metzger, Inc.” Source: RevenueBase Database · checked Sep 22, 2026
22	Energy Shrink, LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	1-10	6 contacts →
	Partial evidence “Energy Shrink is an environmental consulting practice specialized in sustainability and energy efficiency in buildings, that is, high-performance or green buildings.” Source: RevenueBase Database · checked Sep 22, 2026
23	Adaptive Green	Strong evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	4 contacts →
	Strong evidence “Adaptive Green designs, installs and maintains green building components such as green roofs, solar panels, green walls and sustainable water management systems.” Source: RevenueBase Database · checked Sep 22, 2026
24	Deborah Brosnan & Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	1-10	4 contacts →
	Indirect evidence “Leading and innovative company that finding solutions, bridging gaps and driving positive action for clients and the planet.” Source: RevenueBase Database · checked Sep 22, 2026
25	Taurus Development Group And Taurus Renovation & Construction	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	11-50	4 contacts →
	Indirect evidence “A full service Development, Construction and Management Firm Development, Energy Efficiency, Benchmarking, Program Management, Development Consulting, Construction Management…” Source: RevenueBase Database · checked Sep 22, 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 design consultants. 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 design consultants.
Partial evidence: Its own public description names part of sustainable design consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable design consultants. 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 77 sustainable design consultants based in Washington, United States

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Sustainable design consultants based in Washington, United States at a glance

As of Sep 22, 2026

31.4%Verified-email coverage

14.4Average contacts per company

1-10Median size (employees)

331.2%Largest-city concentration · New York

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 77 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 design consultants, 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 Washington, United States whose own description of what they do matches “sustainable design consultants”. 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 design consultants), 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 design consultants, and records with no verified work email. Companies headquartered outside Washington 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, 348 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 22, 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 design consultants by metro in the United States

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 design consultants, 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 design consultants are there based in Washington, United States?

RevenueBase identified 77 sustainable design consultants headquartered in Washington, 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?

RTKL, headquartered in Washington, tops this list with the largest team on record.

Which city has the most sustainable design consultants?

New York leads with 255 headquartered companies, followed by Chicago (105) and Houston (87).

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 348 verified decision-maker contacts tracked across these 77 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 22, 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.