Company lists · Data refreshed September 2026

Top 25 City sustainability consultants based in Washington, United States

Name: City sustainability 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 19, 2026 100 companies tracked

RevenueBase identified 100 company matches for city sustainability consultants associated with Washington, United States as of September 2026 and tracks 1,929 professional contacts across them, including 641 with verified work emails. Across the United States, New York is the largest hub for this category (176 companies); Washington follows with 100.

This list covers company matches for city sustainability 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 19, 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 19, 2026 How this list was built

100Companies

1,929Contacts tracked

641Verified emails

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The 25 largest city sustainability consultants based in Washington, United States

Ranked by team size

Top 25 of 100 company matches for city sustainability consultants based in Washington, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	Synergy Consulting, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	434 contacts →
	Exact match “Synergy Consulting is Global Leader in Financial and Corporate Advisory.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	RTKL	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
3	Peer Consultants, P.C	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	71 contacts →
	Exact match “In 1978, PEER was established under Dr.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Baumann Consulting	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
5	David M. Schwarz Architects	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	40 contacts →
	Exact match “David M.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	Northbridge	Exact match	Washington, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
7	North Arrow, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
8	Ridge-Lane Limited Partners	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	21 contacts →
	Exact match “RIDGE-LANE Limited Partners is a strategic advisory and venture development company founded by financier R.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Fillat Architecture	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
10	The Clark Group LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
11	Amis Patel Brewer	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	1-10	18 contacts →
	Exact match “Amis, Patel & Brewer, LLP is a boutique law firm focused on providing legal services to the renewable energy and sustainability sectors.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	E&w LAW	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	18 contacts →
	Exact match “At Earth & Water, we are more than lawyers – we’re strategic advisors with unique experience who advance our clients’ interests across a broad range of environmental and business…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Bell Architects, PC	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
14	Bradley Site Design, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	16 contacts →
	Exact match “Located in Washington, DC, Bradley Site Design is a dynamic Landscape Architecture, Civil Engineering and Planning firm founded in 1994 and dedicated to the creation of socially…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Numark Associates, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	15 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Sustainable Capital Advisors	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	14 contacts →
	Exact match “Sustainable Capital Advisors (SCA) is a strategy consulting and financial advisory firm focused on delivering innovative capital solutions for the sustainable infrastructure…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Co2efficient	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
18	Sustainable YOU	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
19	Soto Architecture & Urban Design, Pllc	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	14 contacts →
	Exact match “Architecture & Urban design team located in the 14th Street corridor of Washington, DC.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	LEE And Associates, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
21	Rebel North America	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	12 contacts →
	Exact match “As one of the leading U.S.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Sustainable Strategies DC	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	1-10	11 contacts →
	Exact match “Sustainable Strategies DC is a government affairs and strategic consulting firm based in Washington, DC, that helps clients secure resources for community revitalization and tools…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Trusted Advisory Group	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	1-10	10 contacts →
	Exact match “Trusted Advisory Group is a Washington, DC based management consultant firm focused on the commercial real estate industry.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Global Connective Center, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	10 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Green Strategies, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	1-10	8 contacts →
	Exact match “Green Strategies Inc.” Recorded in the RevenueBase company graph · Sep 19, 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 “city sustainability 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 100 city sustainability consultants based in Washington, United States

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City sustainability consultants based in Washington, United States at a glance

As of Sep 19, 2026

33.2%Verified-email coverage

19.3Average contacts per company

1-10Median size (employees)

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

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 100 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 “city sustainability 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 641 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 19, 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.

City sustainability 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 “city sustainability consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many city sustainability consultants are there based in Washington, United States?

RevenueBase identified 100 company matches for city sustainability 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?

Synergy Consulting, INC 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 city sustainability consultants?

New York leads the United States with 176 company records, followed by Washington (100) and Chicago (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 641 professional contacts with verified work emails tracked across these 100 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 19, 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.