Company lists · Data refreshed September 2026

Top 25 Energy efficient building contractors based in New York, United States

Name: Energy efficient building contractors based in New York, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 96 companies tracked

RevenueBase identified 96 energy efficient building contractors headquartered in New York, United States as of September 2026 and tracks 1,863 professional contacts across them, including 973 with verified work emails. New York is the largest hub.

This list covers energy efficient building contractors headquartered in New York, 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

96Companies

1,863Contacts tracked

973Verified emails

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The 25 largest energy efficient building contractors based in New York, United States

Ranked by team size

Top 25 of 96 energy efficient building contractors based in New York, United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy efficient building contractors: 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	Syska Hennessy Group	Indirect evidence	New York, United StatesHQ checked Sep 16, 2026	501-1,000	803 contacts →
	Indirect evidence “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Source: RevenueBase Database · checked Sep 16, 2026
2	Bright Power	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	205 contacts →
	Strong evidence “Bright Power is a leading provider of energy efficiency and decarbonization solutions for the real estate industry.” Source: RevenueBase Database · checked Sep 16, 2026
3	En-Power Group	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	75 contacts →
	Partial evidence “We help building owners cut carbon, reduce costs, and stay compliant.” Source: RevenueBase Database · checked Sep 16, 2026
4	EME Consulting Engineering And Architecture Group, LLC	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	75 contacts →
	Indirect evidence “EME Consulting Engineering and Architecture Group, LLC (EME Group) is an award-winning professional engineering firm licensed and insured to provide professional engineering…” Source: RevenueBase Database · checked Sep 16, 2026
5	Codegreen	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	72 contacts →
	Strong evidence “CodeGreen is a leading national sustainability and energy efficiency consulting firm.” Source: RevenueBase Database · checked Sep 16, 2026
6	PEI Cobb Freed & Partners	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	58 contacts →
	Indirect evidence “a global leader in architecture, planning, and sustainable design” Source: RevenueBase Database · checked Sep 16, 2026
7	Highmark Building Efficiency	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	43 contacts →
	Partial evidence “HIGHMARK’s mission is to support building sustainability, electrification, decarbonization and cost savings.” Source: RevenueBase Database · checked Sep 16, 2026
8	Dagher Engineering, Pllc	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	37 contacts →
	Partial evidence “Dagher Engineering is an award-winning building systems engineering and sustainability consulting firm based in New York City.” Source: RevenueBase Database · checked Sep 16, 2026
9	Ingui Architecture	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	26 contacts →
	Indirect evidence “Ingui Architecture, formerly Baxt Ingui Architects, is an award-winning firm that has been a leader in design and sustainability for over 45 years.” Source: RevenueBase Database · checked Sep 16, 2026
10	Energy Economic Development Corporation	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	1-10	23 contacts →
	Strong evidence “The Energy Economic Development Corporation delivers cost-saving energy efficiency retrofits that place minimal burden on building owners and managers.” Source: RevenueBase Database · checked Sep 16, 2026
11	Barliswedlick Architects	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “BarlisWedlick is an award-winning, full-service firm known for designing expressive, sustainable, and soulful places to live, work, and gather.” Source: RevenueBase Database · checked Sep 16, 2026
12	DVL Consulting Engineers, INC	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	18 contacts →
	Partial evidence “DVL Consulting Engineers, Inc, established in October 1990, is a multifaceted Engineering Firm, specializing in Green Buildings Design for Mechanical, Electrical, and Plumbing…” Source: RevenueBase Database · checked Sep 16, 2026
13	Smith Engineering, Pllc	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “Smith Engineering’s goal is to challenge the status quo.” Source: RevenueBase Database · checked Sep 16, 2026
14	Building Energy Exchange	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	1-10	13 contacts →
	Strong evidence “The Building Energy Exchange (BE-Ex) is a center of excellence dedicated to reducing the effects of climate change by improving the built environment.” Source: RevenueBase Database · checked Sep 16, 2026
15	Werpo Solutions	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	12 contacts →
	Partial evidence “Werpo is a full-service design-and-build energy conservation firm providing cost-effective solutions for our clients.” Source: RevenueBase Database · checked Sep 16, 2026
16	Building Studio Architects	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	1-10	10 contacts →
	Partial evidence “Founded in New York City in 1992, Building Studio Architects is a full-service architecture and interior design firm with experience in a broad range of project types, including…” Source: RevenueBase Database · checked Sep 16, 2026
17	Reisource Technology	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	10 contacts →
	Indirect evidence “ReiSource is more than a partner – we are collaborators, creatives, and problem-solvers dedicated to redefining the possibilities of construction.” Source: RevenueBase Database · checked Sep 16, 2026
18	Greenwich Energy Solutions	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	1-10	10 contacts →
	Strong evidence “Greenwich Energy Solutions delivers greening and energy efficiency services for commercial and multifamily buildings anywhere in the United States.” Source: RevenueBase Database · checked Sep 16, 2026
19	Elemental Architecture LLC	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	10 contacts →
	Indirect evidence “Elemental is an award-winning New York City based collaborative consisting of Elemental Architecture LLC & Sine Elemental LLC joined by an inherent commitment to environmental and…” Source: RevenueBase Database · checked Sep 16, 2026
20	AMA Design Build	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	1-10	9 contacts →
	Indirect evidence “As of November of 2025, AMA Design Build (AMADB) has merged with CMTA!” Source: RevenueBase Database · checked Sep 16, 2026
21	Heritage Architecture	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	7 contacts →
	Partial evidence “Heritage Architecture is a green practice, consistent in providing sustainable and energy-driven solutions through distinctive services in architecture, interiors, planning &…” Source: RevenueBase Database · checked Sep 16, 2026
22	Ivan Brice Architecture	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	1-10	7 contacts →
	Indirect evidence “For over three decades, our firm has conceived project-specific solutions, while applying proven technical expertise to conserve, retrofit & optimize the performance of existing…” Source: RevenueBase Database · checked Sep 16, 2026
23	Triple NET Energy	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	1-10	6 contacts →
	Partial evidence “Triple Net Energy Advisory Services (TNE) is one of the most experienced energy engineering and advanced metering infrastructure technologies firms in the Tri-State area with a…” Source: RevenueBase Database · checked Sep 16, 2026
24	Greenhomenyc	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	6 contacts →
	Indirect evidence “GreenHomeNYC is a community-oriented, volunteer-run organization.” Source: RevenueBase Database · checked Sep 16, 2026
25	IAQ Systems INC	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	6 contacts →
	Indirect evidence “IAQ Systems Inc is a renewables & environment company based out of 9th Avenue, Suite 1502, New York, NY 10018-4634.” 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: energy efficient building contractors. 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 energy efficient building contractors.
Partial evidence: Its own public description names part of energy efficient building contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficient building contractors. 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 96 energy efficient building contractors based in New York, United States

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Energy efficient building contractors based in New York, United States at a glance

As of Sep 16, 2026

52.2%Verified-email coverage

19.4Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · New York

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Email recency for this list is measured across the whole United States list rather than for New York, so it is reported there. Company counts and contact totals on this page are exact for New York, over 96 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 energy efficient building contractors, 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 New York, United States whose own description of what they do matches “energy efficient building contractors”. 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 energy efficient building contractors), 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 energy efficient building contractors, and records with no verified work email. Companies headquartered outside New York 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, 973 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.

Energy efficient building contractors by metro in the United States

Energy efficient building contractors in New York96
Energy efficient building contractors in Portland37
Energy efficient building contractors in Chicago36
Energy efficient building contractors in Austin33
Energy efficient building contractors in Atlanta28
Energy efficient building contractors in Los Angeles28
Energy efficient building contractors in Seattle28
Energy efficient building contractors in San Francisco26
Energy efficient building contractors in Houston25

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 energy efficient building contractors, 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 energy efficient building contractors are there based in New York, United States?

RevenueBase identified 96 energy efficient building contractors headquartered in New York, 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?

Syska Hennessy Group, headquartered in New York, tops this list with the largest team on record.

Which city has the most energy efficient building contractors?

New York leads with 96 headquartered companies, followed by Portland (37) and Chicago (36).

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 973 verified decision-maker contacts tracked across these 96 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.