Company lists · Data refreshed October 2026

Top 25 Energy efficient building architects based in the United States

Name: Energy efficient building architects based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 5,816 companies tracked

RevenueBase identified 5,816 company matches for energy efficient building architects associated with the United States as of October 2026 and tracks 96,490 professional contacts across them, including 45,275 with verified work emails. New York is the largest hub.

This list covers company matches for energy efficient building architects associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 12, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 12, 2026 How this list was built

5,816Companies

96,490Contacts tracked

45,275Verified emails

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The 25 largest energy efficient building architects based in the United States

Ranked by team size

Top 25 of 5,816 company matches for energy efficient building architects based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	HOK	Exact match	New York, NY, United StatesHQ recorded Oct 12, 2026	1,001-5,000	2,772 contacts →
	Exact match “HOK is a global interdisciplinary design firm.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	Mckinstry	Exact match	Seattle, WA, United StatesHQ recorded Oct 12, 2026	1,001-5,000	2,293 contacts →
	Exact match “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3	Skidmore, Owings & Merrill SOM	Exact match	New York, NY, United StatesHQ recorded Oct 12, 2026	1,001-5,000	2,102 contacts →
	Exact match “Skidmore, Owings & Merrill (SOM) is a global practice of architects, designers, engineers, and planners, responsible for some of the world’s most technically and environmentally…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	IMEG	Exact match	Rock Island, IL, United StatesHQ recorded Oct 12, 2026	1,001-5,000	2,064 contacts →
	Exact match “Leaders in Engineering and Innovation.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	DLR Group	Exact match	30 Offices, MN, United StatesHQ recorded Oct 12, 2026	1,001-5,000	2,039 contacts →
	Exact match “DLR Group is an integrated design firm delivering architecture, engineering, interiors, planning, and building optimization for new construction, renovation, and adaptive reuse.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	OLA	Exact match	Austin, TX, United StatesHQ recorded Oct 12, 2026	n/a	1,150 contacts →
	Exact match “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	The Beck Group	Exact match	Dallas, TX, United StatesHQ recorded Oct 12, 2026	501-1,000	1,135 contacts →
	Exact match “We integrate architecture, construction, sustainability, and technology to transform how our clients design and build.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	Affiliated Engineers, INC	Exact match	Madison, WI, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,059 contacts →
	Exact match “Affiliated Engineers, Inc.(AEI) provides engineering leadership and whole-mission solutions for complex building, energy, and utility projects.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	KPF	Exact match	New York, NY, United StatesHQ recorded Oct 12, 2026	501-1,000	1,058 contacts →
	Exact match “KPF is dedicated to transforming cities through impactful design, collaborating closely with the world’s most forward-thinking clients to create high performing, carefully crafted…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	Syska Hennessy Group	Exact match	New York, United StatesHQ recorded Oct 12, 2026	501-1,000	835 contacts →
	Exact match “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	PAE	Exact match	Portland, OR, United StatesHQ recorded Oct 12, 2026	201-500	835 contacts →
	Exact match “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	ZGF Architects	Exact match	Portland, OR, United StatesHQ recorded Oct 12, 2026	501-1,000	827 contacts →
	Exact match “With our origins in Oregon, attention to craft and beauty is elemental to the ZGF culture.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	Introba	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	1,001-5,000	816 contacts →
	Exact match “Introba is one of the world’s largest building engineering and consulting firms with more than employees in offices across the United States, Canada, the United Kingdom, Serbia…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	Lpa, INC	Exact match	Irvine, CA, United StatesHQ recorded Oct 12, 2026	501-1,000	757 contacts →
	Exact match “Since LPA was founded in 1965, it's been our mission to deliver timeless, sustainable designs that benefit the environment, generate lasting value, enrich the human experience and…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	M3 Engineering & Technology Corp	Exact match	Tucson, AZ, United StatesHQ recorded Oct 12, 2026	501-1,000	756 contacts →
	Exact match “M3 is a privately held full service design firm.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	H2m Architects Engineers	Exact match	Melville, NY, United StatesHQ recorded Oct 12, 2026	501-1,000	685 contacts →
	Exact match “About H2M H2M architects + engineers is a multi-disciplinary professional consulting and design firm, proud of its long history of client service and consistent ability to meet…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	Cushing Terrell	Exact match	Billings, MT, United StatesHQ recorded Oct 12, 2026	201-500	642 contacts →
	Exact match “Cushing Terrell was founded in 1938 by architects Ralph Cushing and Everett Terrell.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	Ls3p Associates LTD	Exact match	Charleston, SC, United StatesHQ recorded Oct 12, 2026	201-500	578 contacts →
	Exact match “LS3P is an architecture, interiors, and planning firm celebrating more than 60 years of design excellence.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	Vanderweil Engineers	Exact match	Boston, MA, United StatesHQ recorded Oct 12, 2026	201-500	562 contacts →
	Exact match “Vanderweil is a mechanical, electrical, plumbing, fire protection, technology, sustainability, commissioning, and power engineering firm dedicated to providing customized and…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Little Diversified Architectural Consulting	Exact match	Little Global, VA, United StatesHQ recorded Oct 12, 2026	201-500	524 contacts →
	Exact match “At Little, we deliver results far beyond architecture-results you wouldn’t expect from an architectural firm.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	RTM Engineering Consultants	Exact match	Schaumburg, IL, United StatesHQ recorded Oct 12, 2026	201-500	514 contacts →
	Exact match “We are an engineering firm that goes beyond a typical consulting role.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	Sitelogiq	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 12, 2026	501-1,000	491 contacts →
	Exact match “SitelogIQ provides design, engineering, and construction management services that help organizations nationwide modernize their facilities and infrastructure.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23	Estudio Architecture	Exact match	Houston, TX, United StatesHQ recorded Oct 12, 2026	n/a	391 contacts →
	Exact match “eStudio is a specialized full service architectural and boutique design firm.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	Glumac	Exact match	San Francisco, CA, United StatesHQ recorded Oct 12, 2026	201-500	386 contacts →
	Exact match “Glumac, a Tetra Tech Company, is a global leader in building engineering, committed to delivering a low carbon future for all.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25	P2s	Exact match	Long Beach, CA, United StatesHQ recorded Oct 12, 2026	201-500	381 contacts →
	Exact match “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “energy efficient building architects”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 5,816 energy efficient building architects based in the United States

See the full list, filter by size, metro and specialty, and access 45,275 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Energy efficient building architects based in the United States at a glance

As of Oct 12, 2026

46.9%Verified-email coverage

16.6Average contacts per company

1-10Median size (employees)

5.6%Largest-city concentration · New York

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

3,695

11-50

1,750

51-200

287

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 5,816 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United States whose business descriptions match “energy efficient building architects” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 45,275 professional contacts with verified work emails across the full matched dataset. 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 October 12, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Energy efficient building architects by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “energy efficient building architects”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy efficient building architects are there based in the United States?

RevenueBase identified 5,816 company matches for energy efficient building architects associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

HOK tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most energy efficient building architects?

New York leads with 328 company records, followed by Los Angeles (121) and Chicago (108).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 45,275 professional contacts with verified work emails tracked across these 5,816 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 12, 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.