Company lists · Data refreshed September 2026

Top 25 Carbon neutral construction firms based in the United States

Name: Carbon neutral construction firms 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 2,732 companies tracked

RevenueBase identified 2,732 carbon neutral construction firms headquartered in the United States as of September 2026 and tracks 37,864 professional contacts across them, including 14,984 with verified work emails. New York is the largest hub.

This list covers carbon neutral construction 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, 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

2,732Companies

37,864Contacts tracked

14,984Verified emails

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The 25 largest carbon neutral construction firms based in the United States

Ranked by team size

Top 25 of 2,732 carbon neutral construction firms 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 carbon neutral construction 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	BL Harbert International LLC	Partial evidence	Birmingham, AL, United StatesHQ checked Sep 16, 2026	5,001-10,000	2,818 contacts →
	Partial evidence “BL Harbert International, LLC began construction operations in under the leadership of Billy Harbert, Jr, carrying on a family tradition in the construction industry dating back…” Source: RevenueBase Database · checked Sep 16, 2026
2	Mckinstry	Partial evidence	Seattle, WA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,213 contacts →
	Partial evidence “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Source: RevenueBase Database · checked Sep 16, 2026
3	IMEG	Indirect evidence	Rock Island, IL, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,985 contacts →
	Indirect evidence “Leaders in Engineering and Innovation.” Source: RevenueBase Database · checked Sep 16, 2026
4	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
5	The Beck Group	Partial evidence	Dallas, TX, United StatesHQ checked Sep 16, 2026	501-1,000	1,054 contacts →
	Partial evidence “We integrate architecture, construction, sustainability, and technology to transform how our clients design and build.” Source: RevenueBase Database · checked Sep 16, 2026
6	Wanzek Construction, Inc., A Mastec Company	Partial evidence	Fargo, ND, United StatesHQ checked Sep 16, 2026	1,001-5,000	933 contacts →
	Partial evidence “Wanzek Construction, Inc, a MasTec Renewables company, is a leading general construction contractor and clean energy services company headquartered in Fargo, North Dakota.” Source: RevenueBase Database · checked Sep 16, 2026
7	Shimmick Corporation	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	760 contacts →
	Indirect evidence “At Shimmick (NASDAQ: SHIM), we’re shaping the future of sustainable infrastructure through innovative solutions that advance communities and protect our environment.” Source: RevenueBase Database · checked Sep 16, 2026
8	O&g Industries, INC	Partial evidence	Torrington, CT, United StatesHQ checked Sep 16, 2026	501-1,000	538 contacts →
	Partial evidence “O&G is Connecticut’s largest privately-held construction company, one of the country’s Top 400 Contractors and a Top 100 Green Building Contractor.” Source: RevenueBase Database · checked Sep 16, 2026
9	Sellen Construction	Partial evidence	Seattle, WA, United StatesHQ checked Sep 16, 2026	501-1,000	470 contacts →
	Partial evidence “Sellen Construction is a locally owned and operated commercial builder.” Source: RevenueBase Database · checked Sep 16, 2026
10	Sitelogiq	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 16, 2026	501-1,000	450 contacts →
	Partial evidence “SitelogIQ provides design, engineering, and construction management services that help organizations nationwide modernize their facilities and infrastructure.” Source: RevenueBase Database · checked Sep 16, 2026
11	Bernards	Indirect evidence	San Fernando, CA, United StatesHQ checked Sep 16, 2026	201-500	418 contacts →
	Indirect evidence “Founded in 1974, Bernards is a nationally ranked, employee-owned multidisciplinary commercial builder that provides technical expertise and professional services to a wide variety…” Source: RevenueBase Database · checked Sep 16, 2026
12	Estudio Architecture	Indirect evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	n/a	390 contacts →
	Indirect evidence “eStudio is a specialized full service architectural and boutique design firm.” Source: RevenueBase Database · checked Sep 16, 2026
13	Pike Construction Services	Partial evidence	Rochester, NY, United StatesHQ checked Sep 16, 2026	501-1,000	387 contacts →
	Partial evidence “When it comes to your building needs, it’s not enough to find a construction company that gets the job done.” Source: RevenueBase Database · checked Sep 16, 2026
14	Veregy	Indirect evidence	Phoenix, MO, United StatesHQ checked Sep 16, 2026	501-1,000	383 contacts →
	Indirect evidence “Veregy is an award-winning NAESCO-Accredited decarbonization company focusing on accelerating and simplifying the Energy Transition.” Source: RevenueBase Database · checked Sep 16, 2026
15	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
16	Newcomb & Boyd, LLP	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 16, 2026	201-500	363 contacts →
	Indirect evidence “We help clients design and operate facilities that remain resilient, reliable, and ready for what's next.” Source: RevenueBase Database · checked Sep 16, 2026
17	Wendel Companies	Partial evidence	Williamsville, NY, United StatesHQ checked Sep 16, 2026	201-500	355 contacts →
	Partial evidence “Wendel is an Architecture, Engineering, Energy Efficiency, and Construction Management Firm that delivers customized solutions and turnkey projects in innovative ways.” Source: RevenueBase Database · checked Sep 16, 2026
18	W. M. Jordan Company	Indirect evidence	Newport News, VA, United StatesHQ checked Sep 16, 2026	201-500	347 contacts →
	Indirect evidence “W.” Source: RevenueBase Database · checked Sep 16, 2026
19	Kast Construction	Indirect evidence	West Palm Beach, FL, United StatesHQ checked Sep 16, 2026	201-500	319 contacts →
	Indirect evidence “Thinking Harder.” Source: RevenueBase Database · checked Sep 16, 2026
20	Infrastructure And Energy Alternatives, Inc. IEA , A Mastec Company	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 16, 2026	5,001-10,000	318 contacts →
	Partial evidence “Infrastructure & Energy Alternatives (IEA), a MasTec company, was formed in 2011 and began building an integrated portfolio of energy and infrastructure construction companies.” Source: RevenueBase Database · checked Sep 16, 2026
21	HEAPY	Indirect evidence	Dayton, OH, United StatesHQ checked Sep 16, 2026	201-500	280 contacts →
	Indirect evidence “HEAPY is redefining engineering excellence with a team of dedicated to delivering sustainable, resilient, and future-ready solutions.” Source: RevenueBase Database · checked Sep 16, 2026
22	Kirksey Architecture	Indirect evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	201-500	252 contacts →
	Indirect evidence “We are Kirksey, a Texas-based architecture firm, passionate about great architecture and all things sustainable.” Source: RevenueBase Database · checked Sep 16, 2026
23	Ferguson Construction	Partial evidence	Sidney, OH, United StatesHQ checked Sep 16, 2026	201-500	231 contacts →
	Partial evidence “When Ferguson Construction began in Sidney in 1920, the family business took personal pride in each and every project.” Source: RevenueBase Database · checked Sep 16, 2026
24	The Ruhlin Company	Partial evidence	Sharon Center, OH, United StatesHQ checked Sep 16, 2026	201-500	191 contacts →
	Partial evidence “The Ruhlin Company is a full-service construction firm offering a diverse range of services, including General Contracting, Construction Management and Design/Build.” Source: RevenueBase Database · checked Sep 16, 2026
25	MCN Build	Partial evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	183 contacts →
	Partial evidence “MCN Build is a purpose driven construction company with the vision of building facilities that matter―to clients, to the community, and to the environment.” 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: carbon neutral construction 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 carbon neutral construction firms.
Partial evidence: Its own public description names part of carbon neutral construction firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name carbon neutral construction 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 25 of 2,732 carbon neutral construction firms based in the United States

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Carbon neutral construction firms based in the United States at a glance

As of Sep 16, 2026

39.6%Verified-email coverage

13.9Average contacts per company

1-10Median size (employees)

4.2%Largest-city concentration · New York

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

1,687

11-50

817

51-200

176

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 2,732 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 carbon neutral construction 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 the United States whose own description of what they do matches “carbon neutral construction 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 carbon neutral construction 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 carbon neutral construction 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 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, 14,984 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.

Carbon neutral construction firms by metro

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 carbon neutral construction 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 carbon neutral construction firms are there based in the United States?

RevenueBase identified 2,732 carbon neutral construction 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?

BL Harbert International LLC, headquartered in Birmingham, tops this list with the largest team on record.

Which city has the most carbon neutral construction firms?

New York leads with 115 headquartered companies, followed by Los Angeles (57) and Portland (53).

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 14,984 verified decision-maker contacts tracked across these 2,732 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.