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 company matches for sustainable design consultants associated with Washington, United States as of September 2026 and tracks 1,109 professional contacts across them, including 348 with verified work emails. Across the United States, New York is the largest hub for this category (255 companies); Washington has 77.

This list covers company matches for sustainable design consultants associated with Washington, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 22, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 22, 2026 How this list was built

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 company matches for sustainable design consultants based in Washington, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	RTKL	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	1,001-5,000	351 contacts →
	Exact match “CRTKL has now joined Arcadis, a global leader in the delivery of sustainable design, engineering and consultancy solutions for natural and built assets.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2	Setty & Associates	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	201-500	220 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3	Shalom Baranes Associates	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	51-200	84 contacts →
	Exact match “Shalom Baranes Associates (SBA) is a Washington, DC architectural firm with an acclaimed reputation for its expertise in residential, commercial, institutional, and governmental…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4	Peer Consultants, P.C	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	51-200	71 contacts →
	Exact match “In 1978, PEER was established under Dr.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5	Baumann Consulting	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	51-200	63 contacts →
	Exact match “Baumann Consulting is driven to deliver solutions for a carbon-neutral real estate industry.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6	Northbridge	Exact match	Washington, United StatesHQ recorded Sep 22, 2026	11-50	24 contacts →
	Exact match “At Northbridge, we provide our clients with the tools and expertise to help solve complex financial, policy, and environmental challenges.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7	North Arrow, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	22 contacts →
	Exact match “DUNS Number: 08-001-8268 CAGE Code: 7GN69 SBA Certified Small Business District of Columbia Certified Business Enterprise (CBE) Metropolitan Washington Airports Authority Local…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8	Fillat Architecture	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	20 contacts →
	Exact match “FILLAT+ is a design studio headquartered in Washington, DC with offices in Baltimore, New York and San Diego.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9	The Clark Group LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	19 contacts →
	Exact match “The Clark Group is an environmental policy consulting firm that provides a broad range of services to government, private and nonprofit clients.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10	Bell Architects, PC	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	16 contacts →
	Exact match “BELL Architects' works closely with communities to create places where people want to be.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11	Numark Associates, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	15 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12	Co2efficient	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	1-10	14 contacts →
	Exact match “CO2EFFICIENT LLC (COEFFICIENT) was founded in 2017 as a mission-focused Washington, D.C.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13	Sustainable YOU	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	51-200	14 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14	LEE And Associates, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	12 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15	Green Strategies, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	1-10	8 contacts →
	Exact match “Green Strategies Inc.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16	Bhi- Construction & Real Estate Development	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	8 contacts →
	Exact match “BHI Construction & Real Estate Development helps owners plan, protect, and deliver complex real estate, capital improvement, and construction projects.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17	The Climate Board	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	7 contacts →
	Exact match “The Climate Board builds AI-enhanced data products for corporate climate teams, closing the gap between infrequent assessments and real-time risk.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18	SORG	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	7 contacts →
	Exact match “Sorg is a full-service, international design firm offering architectural design services as well as programming, interior design, and construction management that was established…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19	Partnership International, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	7 contacts →
	Exact match “Partnership International, Inc, founded in 1990, is an international consulting firm that provides socio-economic, regulatory, institutional, technical, commercial and financial…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20	Green Capitol	Exact match	Washington, United StatesHQ recorded Sep 22, 2026	1-10	7 contacts →
	Exact match “Green Capitol LLC works on sustainable development policy at the state, federal and international levels, serving clients on agriculture, energy and environment concerns via…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21	Heller & Metzger, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	1-10	6 contacts →
	Exact match “Founded in 1982, Heller & Metzger, Inc.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22	Energy Shrink, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	1-10	6 contacts →
	Exact match “Energy Shrink is an environmental consulting practice specialized in sustainability and energy efficiency in buildings, that is, high-performance or green buildings.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23	Adaptive Green	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	4 contacts →
	Exact match “Adaptive Green designs, installs and maintains green building components such as green roofs, solar panels, green walls and sustainable water management systems.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24	Deborah Brosnan & Associates	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	1-10	4 contacts →
	Exact match “Leading and innovative company that finding solutions, bridging gaps and driving positive action for clients and the planet.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25	Taurus Development Group And Taurus Renovation & Construction	Exact match	Washington, DC, United StatesHQ recorded Sep 22, 2026	11-50	4 contacts →
	Exact match “A full service Development, Construction and Management Firm Development, Energy Efficiency, Benchmarking, Program Management, Development Consulting, Construction Management…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “sustainable design consultants”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 77 sustainable design consultants based in Washington, United States

See the full list, filter by size, metro and specialty, and access 348 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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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)

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

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Washington, United States whose business descriptions match “sustainable design consultants” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 348 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Sustainable design consultants by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “sustainable design consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sustainable design consultants are there based in Washington, United States?

RevenueBase identified 77 company matches for sustainable design consultants associated with Washington, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

RTKL tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most sustainable design consultants?

New York leads the United States with 255 company records, followed by Chicago (105) and Houston (87). Washington has 77.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 348 professional contacts with verified work emails tracked across these 77 companies; direct dials are available where recorded.

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 SmartSearch, 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.