Company lists · Data refreshed September 2026

Top 24 Green building consulting firms based in Washington, United States

Name: Green building consulting firms based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 73 companies tracked

RevenueBase identified 73 green building consulting firms headquartered in Washington, United States as of September 2026 and tracks 1,684 professional contacts across them, including 320 with verified work emails. Across the United States, New York is the largest hub for this category (261 companies); Washington has 73.

This list covers green building consulting firms 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 28, 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 28, 2026 86% judged on-target in blind review

73Companies

1,684Contacts tracked

320Verified emails

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The 24 largest green building consulting firms based in Washington, United States

Ranked by team size

Top 24 of 73 green building consulting firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to green building consulting 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	RTKL	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1,001-5,000	351 contacts →
	Indirect 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 28, 2026
2	Setty & Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
3	Peer Consultants, P.C	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	71 contacts →
	Indirect evidence “In 1978, PEER was established under Dr.” Source: RevenueBase Database · checked Sep 28, 2026
4	Baumann Consulting	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	63 contacts →
	Partial evidence “Baumann Consulting is driven to deliver solutions for a carbon-neutral real estate industry.” Source: RevenueBase Database · checked Sep 28, 2026
5	Insite	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	39 contacts →
	Indirect evidence “Founded in 2013, InSite is a leading solution partner for the built environment, extracting value from data to engineer meaningful outcomes for its clients.” Source: RevenueBase Database · checked Sep 28, 2026
6	Northbridge	Indirect evidence	Washington, United StatesHQ checked Sep 28, 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 28, 2026
7	North Arrow, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
8	Numark Associates, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
9	Co2efficient	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
10	Sustainable YOU	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
11	Sustainable Strategies DC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	11 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
12	Trusted Advisory Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “Trusted Advisory Group is a Washington, DC based management consultant firm focused on the commercial real estate industry.” Source: RevenueBase Database · checked Sep 28, 2026
13	Green Strategies, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	8 contacts →
	Partial evidence “Green Strategies Inc.” Source: RevenueBase Database · checked Sep 28, 2026
14	Bhi- Construction & Real Estate Development	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
15	The Climate Board	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
16	SORG	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect 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 28, 2026
17	Partnership International, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	7 contacts →
	Partial 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 28, 2026
18	Green Capitol	Partial evidence	Washington, United StatesHQ checked Sep 28, 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 28, 2026
19	Energy Shrink, LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Strong 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 28, 2026
20	Adaptive Green	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
21	Deborah Brosnan & Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
22	Taurus Development Group And Taurus Renovation & Construction	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	4 contacts →
	Partial evidence “A full service Development, Construction and Management Firm Development, Energy Efficiency, Benchmarking, Program Management, Development Consulting, Construction Management…” Source: RevenueBase Database · checked Sep 28, 2026
23	Greening Urban LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Greening Urban is a civil engineering firm with built projects in Washington, D.C; Maryland; and Virginia.” Source: RevenueBase Database · checked Sep 28, 2026
24	Ardeidae Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Strategic advisory services for the triple bottom line.” Source: RevenueBase Database · checked Sep 28, 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: green building consulting 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 green building consulting firms.
Partial evidence: Its own public description names part of green building consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name green building consulting 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 24 of 73 green building consulting firms based in Washington, United States

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Green building consulting firms based in Washington, United States at a glance

As of Sep 28, 2026

19.0%Verified-email coverage

23.1Average contacts per company

1-10Median size (employees)

Sep 28, 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 73 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 green building consulting 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 Washington, United States whose own description of what they do matches “green building consulting 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 green building consulting 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 green building consulting firms, 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, 320 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 28, 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.

Green building consulting firms 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 green building consulting 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 green building consulting firms are there based in Washington, United States?

RevenueBase identified 73 green building consulting firms 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 in the United States has the most green building consulting firms?

New York leads the United States with 261 headquartered companies, followed by Chicago (104) and Houston (102). Washington has 73.

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 320 verified decision-maker contacts tracked across these 73 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 28, 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.