Company lists · Data refreshed September 2026

Top 25 Green building certification consultants based in the United States

Name: Green building certification consultants 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 571 companies tracked

RevenueBase identified 571 green building certification consultants headquartered in the United States as of September 2026 and tracks 7,569 professional contacts across them, including 2,903 with verified work emails. New York is the largest hub.

This list covers green building certification consultants 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

571Companies

7,569Contacts tracked

2,903Verified emails

Explore this list → Free signup · no credit card · 500 free credits

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

Ranked by team size

Top 25 of 571 green building certification consultants 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 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	OLA	Indirect evidence	Austin, TX, United StatesHQ checked Sep 16, 2026	n/a	1,145 contacts →
	Indirect evidence “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Source: RevenueBase Database · checked Sep 16, 2026
2	AEI Consultants	Strong evidence	Walnut Creek, CA, United StatesHQ checked Sep 16, 2026	201-500	433 contacts →
	Strong evidence “AEI Consultants provides building, environmental, land and sustainability assessment and consulting services throughout North America.” Source: RevenueBase Database · checked Sep 16, 2026
3	P2s	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 16, 2026	201-500	375 contacts →
	Indirect evidence “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Source: RevenueBase Database · checked Sep 16, 2026
4	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
5	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
6	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
7	Cascadia Consulting Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 16, 2026	51-200	110 contacts →
	Indirect evidence “Cascadia Consulting Group is a majority women-owned consulting firm specializing in environmental and sustainability solutions.” Source: RevenueBase Database · checked Sep 16, 2026
8	Citadel EHS	Indirect evidence	Glendale, CA, United StatesHQ checked Sep 16, 2026	51-200	102 contacts →
	Indirect evidence “Founded in 1993, Citadel EHS provides comprehensive environmental, health, safety, and sustainability consulting solutions to meet the needs of both the public and private sectors.” Source: RevenueBase Database · checked Sep 16, 2026
9	AKT Peerless	Partial evidence	Saginaw, MI, United StatesHQ checked Sep 16, 2026	51-200	96 contacts →
	Partial evidence “We are environmental consultants and redevelopment experts who are proud to help build sustainable communities.” Source: RevenueBase Database · checked Sep 16, 2026
10	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
11	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
12	Group14 Engineering, PBC	Partial evidence	Denver, CO, United StatesHQ checked Sep 16, 2026	11-50	75 contacts →
	Partial evidence “Group14 Engineering is a Denver-based consulting firm committed to inspiring better buildings where people thrive.” Source: RevenueBase Database · checked Sep 16, 2026
13	Codegreen	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	72 contacts →
	Indirect evidence “CodeGreen is a leading national sustainability and energy efficiency consulting firm.” Source: RevenueBase Database · checked Sep 16, 2026
14	Baumann Consulting	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 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 16, 2026
15	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
16	ME Engineering, P.C., Mechanical & Electrical Engineering	Indirect evidence	Rochester, NY, United StatesHQ checked Sep 16, 2026	51-200	61 contacts →
	Indirect evidence “M/E Engineering, P.C.” Source: RevenueBase Database · checked Sep 16, 2026
17	Epsten Group, A Salas O'brien Company	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 16, 2026	51-200	59 contacts →
	Indirect evidence “At Epsten Group, we pride ourselves on being a pioneer for sustainability in the built environment.” Source: RevenueBase Database · checked Sep 16, 2026
18	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
19	Sustainable Building Partners	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 16, 2026	11-50	53 contacts →
	Partial evidence “Sustainable Building Partners (SBP) offers building professionals and end-users precise energy efficiency and sustainable solutions for new and existing assets.” Source: RevenueBase Database · checked Sep 16, 2026
20	Strategic Energy Solutions, INC	Indirect evidence	Berkley, MI, United StatesHQ checked Sep 16, 2026	11-50	52 contacts →
	Indirect evidence “Strategic Energy Solutions, Inc.® (SES), is a mechanical and electrical consulting engineering firm.” Source: RevenueBase Database · checked Sep 16, 2026
21	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
22	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
23	Atvaga Energy LLC	Strong evidence	Edmonds, WA, United StatesHQ checked Sep 16, 2026	51-200	51 contacts →
	Strong evidence “We are an established team of Energy, MEP, and Green Building professionals that provide Design Assistance for Engineers and Architects.” Source: RevenueBase Database · checked Sep 16, 2026
24	Altura	Indirect evidence	Newport Beach, CA, United StatesHQ checked Sep 16, 2026	51-200	47 contacts →
	Indirect evidence “Altura is a new breed of engineering consulting firm, delivering everything it takes to guide owners to realizing climate and carbon goals by improving energy, environmental, and…” Source: RevenueBase Database · checked Sep 16, 2026
25	Aeterra, LLC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 16, 2026	11-50	43 contacts →
	Indirect evidence “Aeterra is a full-service environmental and sustainability consulting firm that provides operating businesses and their owners with meaningful, practical, business-focused advice.” 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 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 green building certification consultants.
Partial evidence: Its own public description names part of green building certification consultants, 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 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 571 green building certification consultants based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,903 reachable decision-makers.

Free signup · no credit card

View the full list →

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

As of Sep 16, 2026

38.4%Verified-email coverage

13.3Average contacts per company

1-10Median size (employees)

4.9%Largest-city concentration · New York

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

382

11-50

153

51-200

201-500

501-1,000

1,001-5,000

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 571 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 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 the United States whose own description of what they do matches “green building certification 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 green building certification 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 green building certification consultants, 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, 2,903 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.

Green building certification consultants by metro

Green building certification consultants in New York28

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 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 green building certification consultants are there based in the United States?

RevenueBase identified 571 green building certification consultants 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?

OLA, headquartered in Austin, tops this list with the largest team on record.

Which city has the most green building certification consultants?

New York leads with 28 headquartered companies, followed by Atlanta (15) and Chicago (14).

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 2,903 verified decision-maker contacts tracked across these 571 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.

Ready to reach these companies? Verified emails and direct dials for all 571 green building certification consultants based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Green building certification consultants by geography

Browse the directory

Browse: Companies home · All United States lists · All Green building certification consultants lists · New lists

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.