Company lists · Data refreshed September 2026
Top 25 Leed certification consulting firms based in the United States
RevenueBase identified 515 leed certification consulting firms headquartered in the United States as of September 2026 and tracks 7,832 professional contacts across them, including 3,127 with verified work emails and 2,982 with mobile numbers. New York is the largest hub.
This list covers leed certification consulting firms 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 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.
The 25 largest leed certification consulting firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | OLAPartial evidence | 1,145 | |||
“OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 2 | 806 | ||||
“Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 3 | 396 | ||||
“Glumac, a Tetra Tech Company, is a global leader in building engineering, committed to delivering a low carbon future for all.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 4 | 370 | ||||
“P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 5 | Jva, INCPartial evidence | 254 | |||
“JVA, Incorporated is an employee-owned consulting engineering firm with offices in Boulder, Fort Collins, Winter Park, Glenwood Springs, and Denver, Colorado.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 6 | 150 | ||||
“Grumman|Butkus Associates (GBA) is a nationally recognized consulting engineering firm that specializes in mechanical, electrical and plumbing design services and energy and…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 7 | 142 | ||||
“For over five decades, we’ve been at the forefront of transforming the built environment to be more energy efficient, accessible, healthy, and resilient.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 8 | 134 | ||||
Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 9 | 95 | ||||
“We are environmental consultants and redevelopment experts who are proud to help build sustainable communities.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 10 | Verdani PartnersStrong evidence | 86 | |||
“Verdani Partners is a full service sustainability consulting firm specialized in corporate sustainability, LEED certification and greening and retrofitting existing buildings.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 11 | Magrann AssociatesPartial evidence | 79 | |||
“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: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 12 | 76 | ||||
“Group14 Engineering is a Denver-based consulting firm committed to inspiring better buildings where people thrive.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 13 | 71 | ||||
“CodeGreen is a leading national sustainability and energy efficiency consulting firm.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 14 | 60 | ||||
“Recognized for advanced subject matter expertise, wide-ranging technical resources, creative problem-solving, and excellence in professional practice, Brightworks Sustainability…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 15 | 59 | ||||
“At Epsten Group, we pride ourselves on being a pioneer for sustainability in the built environment.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 16 | RGD Consulting EngineersPartial evidence | 53 | |||
“For over 35 years, RGD Consulting Engineers has provided innovative structural, mechanical, electrical, plumbing and fire protection engineering designs and project management in…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 17 | Sustainable Investment Group SIGPartial evidence | 52 | |||
“Sustainable Investment Group, LLC (SIG) is a full-service sustainable building consulting firm that provides environmentally focused solutions to design, construction, and real…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 18 | SkyetecPartial evidence | 52 | |||
“SkyeTec is an award winning energy rating and indoor environmental consulting company that provides third-party inspections for residential and commercial construction projects.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 19 | 50 | ||||
“We are an established team of Energy, MEP, and Green Building professionals that provide Design Assistance for Engineers and Architects.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 20 | Lawhon & Associates, INCPartial evidence | 49 | |||
“Lawhon & Associates, Inc.(L&A) provides full-service environmental and engineering consulting services to the public and private sector.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 21 | 47 | ||||
“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: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 22 | 44 | ||||
“Established in 1979, Hallberg Engineering, Inc.(HEI) is a consulting engineering firm specializing in mechanical, electrical, and technology systems design, building analysis, and…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 23 | LP Consulting Engineers, INCPartial evidence | 44 | |||
“LP Consulting Engineers, Inc.(LPCE) is headquartered in Northern California and has decades of experience.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 24 | 41 | ||||
“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: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 25 | 41 | ||||
“Established in 1986, ACC Environmental Consultants, Inc.(ACC) is an employee-owned full service environmental consulting and design firm recognized for its excellent and reliable…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 515 leed certification consulting firms based in the United States
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Leed certification consulting firms based in the United States at a glance
As of Sep 4, 2026Companies by employee count
Verified emails by last verification
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 leed certification consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “leed certification consulting firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among leed certification consulting firms, 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 an evidence 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, 3,127 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 4, 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.
Leed certification consulting firms by metro
- Leed certification consulting firms in New York33
Frequently asked
How many leed certification consulting firms are there based in the United States?
RevenueBase identified 515 leed certification consulting firms 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 leed certification consulting firms?
New York leads with 33 headquartered companies, followed by Atlanta (12) and Chicago (10).
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 3,127 verified decision-maker contacts tracked across these 515 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 4, 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.
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