Company lists · Data refreshed September 2026

Top 25 Green building certification companies based in the United States

Name: Green building certification companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 280 companies tracked

RevenueBase identified 280 green building certification companies headquartered in the United States as of September 2026 and tracks 3,776 professional contacts across them, including 1,684 with verified work emails. Washington is the largest hub.

This list covers green building certification companies 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 16, 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 16, 2026 86% judged on-target in blind review

280Companies

3,776Contacts tracked

1,684Verified emails

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The 25 largest green building certification companies based in the United States

Ranked by team size

Top 25 of 280 green building certification companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to green building certification companies: 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	U.S. Green Building Council	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	201-500	553 contacts →
	Indirect evidence “The U.S.” Source: RevenueBase Database · checked Sep 16, 2026
2	AEI Consultants	Partial evidence	Walnut Creek, CA, United StatesHQ checked Sep 16, 2026	201-500	433 contacts →
	Partial evidence “AEI Consultants provides building, environmental, land and sustainability assessment and consulting services throughout North America.” Source: RevenueBase Database · checked Sep 16, 2026
3	Green Business Certification Inc. Gbci	Partial evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	n/a	156 contacts →
	Partial evidence “The premier organization independently recognizing excellence in green business industry performance and practice globally.” Source: RevenueBase Database · checked Sep 16, 2026
4	Four Seasons Environmental, INC	Indirect evidence	Monroe, OH, United StatesHQ checked Sep 16, 2026	201-500	134 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
5	RE Tech Advisors	Partial evidence	Mclean, VA, United StatesHQ checked Sep 16, 2026	51-200	124 contacts →
	Partial evidence “RE Tech Advisors, a Legence Company, offers an integrated suite of solutions designed to drive building performance, decrease costs, and overcome any project challenge.” Source: RevenueBase Database · checked Sep 16, 2026
6	Verdani Partners	Strong evidence	Carlsbad, CA, United StatesHQ checked Sep 16, 2026	51-200	89 contacts →
	Strong evidence “Verdani Partners is a full service sustainability consulting firm specialized in corporate sustainability, LEED certification and greening and retrofitting existing buildings.” Source: RevenueBase Database · checked Sep 16, 2026
7	Magrann Associates	Strong evidence	Mount Laurel, NJ, United StatesHQ checked Sep 16, 2026	51-200	81 contacts →
	Strong evidence “MaGrann Associates is an innovative energy efficiency and green building consulting and engineering firm headquartered in Mount Laurel, New Jersey with additional offices in…” Source: RevenueBase Database · checked Sep 16, 2026
8	Brightworks Sustainability	Indirect evidence	Portland, OR, United StatesHQ checked Sep 16, 2026	51-200	61 contacts →
	Indirect evidence “Recognized for advanced subject matter expertise, wide-ranging technical resources, creative problem-solving, and excellence in professional practice, Brightworks Sustainability…” Source: RevenueBase Database · checked Sep 16, 2026
9	Earth Advantage	Strong evidence	Portland, OR, United StatesHQ checked Sep 16, 2026	11-50	58 contacts →
	Strong evidence “We provide knowledge to building professionals and information to the greater community through certification, research, education, and software development to accelerate the…” Source: RevenueBase Database · checked Sep 16, 2026
10	Sustainable Investment Group SIG	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 16, 2026	11-50	52 contacts →
	Partial evidence “Sustainable Investment Group, LLC (SIG) is a full-service sustainable building consulting firm that provides environmentally focused solutions to design, construction, and real…” Source: RevenueBase Database · checked Sep 16, 2026
11	Skyetec	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 16, 2026	51-200	52 contacts →
	Indirect evidence “SkyeTec is an award winning energy rating and indoor environmental consulting company that provides third-party inspections for residential and commercial construction projects.” Source: RevenueBase Database · checked Sep 16, 2026
12	Sustainable Solutions Corporation	Indirect evidence	Royersford, PA, United StatesHQ checked Sep 16, 2026	11-50	43 contacts →
	Indirect evidence “Sustainable Solutions Corporation (SSC) helps organizations reduce costs, improve competitive advantage, and minimize environmental impact through end-to-end corporate…” Source: RevenueBase Database · checked Sep 16, 2026
13	BEE Engineers	Partial evidence	Edmonds, WA, United StatesHQ checked Sep 16, 2026	11-50	41 contacts →
	Partial evidence “BEE provides a comprehensive range of services dedicated to designing, inspecting, and testing buildings with a specific focus on weatherization and air barrier, energy efficiency…” Source: RevenueBase Database · checked Sep 16, 2026
14	Ecoworks Studio	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 16, 2026	11-50	40 contacts →
	Indirect evidence “Ecoworks Studio is an internationally recognized firm in the practice of integrated design principles, sustainability and wellness consulting services.” Source: RevenueBase Database · checked Sep 16, 2026
15	Us-Eco Logic Texenergy Solutions	Partial evidence	Irving, TX, United StatesHQ checked Sep 16, 2026	51-200	40 contacts →
	Partial evidence “US-Eco Logic / TexEnergy Solutions is a consulting firm offering services that assist developments looking to become certified as “green” and/or “energy efficient”.” Source: RevenueBase Database · checked Sep 16, 2026
16	VCA Green	Strong evidence	Orange, CA, United StatesHQ checked Sep 16, 2026	51-200	39 contacts →
	Strong evidence “VCA Green provides a full scope of green building consulting and commissioning services, including LEED®, GreenPoint Rated, CALGreen compliance, HERS, commercial energy audits and…” Source: RevenueBase Database · checked Sep 16, 2026
17	Green Seal	Partial evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	11-50	36 contacts →
	Partial evidence “Green Seal® is a global nonprofit committed to making sustainability everyone’s business.” Source: RevenueBase Database · checked Sep 16, 2026
18	Green Building Initiative GBI	Strong evidence	Portland, OR, United StatesHQ checked Sep 16, 2026	11-50	33 contacts →
	Strong evidence “The Green Building Initiative (GBI) is a 501(c)3 nonprofit organization dedicated to improving the built environment's impact on climate and society.” Source: RevenueBase Database · checked Sep 16, 2026
19	SOL Design Consulting	Strong evidence	Cincinnati, OH, United StatesHQ checked Sep 16, 2026	11-50	33 contacts →
	Strong evidence “Sol design + consulting specializes in energy efficiency and green building certification services for multifamily and commercial developers, owners, builders and architects.” Source: RevenueBase Database · checked Sep 16, 2026
20	Catalyst Partners	Partial evidence	Grand Rapids, MI, United StatesHQ checked Sep 16, 2026	11-50	31 contacts →
	Partial evidence “Catalyst Partners is a multi-dimensional consortium of knowledge leaders committed to high performance restorative protocols for buildings, interiors, and products.” Source: RevenueBase Database · checked Sep 16, 2026
21	Viridiant	Strong evidence	Richmond, VA, United StatesHQ checked Sep 16, 2026	11-50	27 contacts →
	Strong evidence “Viridiant is a non-profit organization advancing sustainable building practices through education, consultation, and certification across the Mid-Atlantic and Southeast.” Source: RevenueBase Database · checked Sep 16, 2026
22	LORAX	Strong evidence	Baltimore, MD, United StatesHQ checked Sep 16, 2026	11-50	25 contacts →
	Strong evidence “About Lorax Partnerships Lorax Partnerships provides sustainability and green building consulting services to building developers, owners, and occupants, as well as business…” Source: RevenueBase Database · checked Sep 16, 2026
23	Revireo	Partial evidence	Springfield, NJ, United StatesHQ checked Sep 16, 2026	11-50	23 contacts →
	Partial evidence “ReVireo provides analysis, consulting, and verification services to help clients determine and achieve target levels of energy efficiency and sustainability for building projects…” Source: RevenueBase Database · checked Sep 16, 2026
24	Ecosupply	Indirect evidence	Middlebury, VT, United StatesHQ checked Sep 16, 2026	11-50	23 contacts →
	Indirect evidence “Our decisions, products and initiatives are based on the ideas of a sustainable future and improving the social, economic and environmental well being of our communities, our…” Source: RevenueBase Database · checked Sep 16, 2026
25	O'brien360	Partial evidence	Seattle, WA, United StatesHQ checked Sep 16, 2026	11-50	21 contacts →
	Partial evidence “O'Brien360 is a nationally recognized leader in the sustainable building community.” Source: RevenueBase Database · checked Sep 16, 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 certification companies. 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 certification companies.
Partial evidence: Its own public description names part of green building certification companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name green building certification companies. 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 280 green building certification companies based in the United States

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Green building certification companies based in the United States at a glance

As of Sep 16, 2026

44.6%Verified-email coverage

13.5Average contacts per company

1-10Median size (employees)

3.9%Largest-city concentration · Washington

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

192

11-50

51-200

201-500

501-1,000

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 280 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 certification companies, 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 “green building certification companies”. 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 certification companies), 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 certification companies, 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, 1,684 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 16, 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.

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 certification companies, 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 certification companies are there based in the United States?

RevenueBase identified 280 green building certification companies 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?

U.S. Green Building Council, headquartered in Washington, tops this list with the largest team on record.

Which city has the most green building certification companies?

Washington leads with 11 headquartered companies, followed by Atlanta (8) and Portland (8).

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 1,684 verified decision-maker contacts tracked across these 280 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 16, 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.