Company lists · Data refreshed September 2026

Top 23 Green building consulting firms based in Philadelphia, United States

Name: Green building consulting firms based in Philadelphia, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 51 companies tracked

RevenueBase identified 51 company matches for green building consulting firms associated with Philadelphia, United States as of September 2026 and tracks 301 professional contacts across them, including 91 with verified work emails. Across the United States, New York is the largest hub for this category (276 companies); Philadelphia has 51.

This list covers company matches for green building consulting firms associated with Philadelphia, 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 September 28, 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 Sep 28, 2026 How this list was built

51Companies

301Contacts tracked

91Verified emails

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The 23 largest green building consulting firms based in Philadelphia, United States

Ranked by team size

Top 23 of 51 company matches for green building consulting firms based in Philadelphia, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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	IEI Group, LTD	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	11-50	33 contacts →
	Exact match “IEI is a nationally recognized, award-winning, 20-person architecture, interior design and facilities planning firm based in Northern Liberties for last 20 years.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Innova Services Corporation	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	11-50	23 contacts →
	Exact match “Innova brings more than 20 years of experience in the multi-family industry to bear in order to assist developers in all phases of development: resource efficiency…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Green Building United	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	20 contacts →
	Exact match “Green Building United is a 501(c)(3) nonprofit organization committed to fostering transformative impact in the Greater Philadelphia, Lehigh Valley, and Delaware regions through…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	RE Vision Architecture	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	11-50	19 contacts →
	Exact match “Re:Vision is a deep green architecture and sustainability consulting practice dedicated to the design of high-performance buildings and sustainable communities.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	SMP Architects	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	11-50	15 contacts →
	Exact match “Attention to environmental concerns and historic, cultural, and architectural contexts are the hallmarks of our firm.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Repsg, INC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	11-50	13 contacts →
	Exact match “REPSG is a full-service environmental consulting and contracting firm dedicated to understanding each customer’s endpoint, plotting the best route forward, and achieving that goal.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Krieger Associates Architects INC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	8 contacts →
	Exact match “Krieger + Associates Architects Inc is an award-winning Philadelphia firm providing architectural, planning, and interior design services to residential, institutional, and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Onion Flats Architecture	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	5 contacts →
	Exact match “Onion Flats Architecture focuses on community development, multidisciplinary thinking and making, high-performance building technologies and alternative construction methodologies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Inch And Meter, PC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	5 contacts →
	Exact match “Inch and Meter, PC is an environmental consulting and engineering firm with offices in Philadelphia and New York City.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Boyer Sudduth Environmental Consultants, LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	4 contacts →
	Exact match “At Boyer Sudduth Environmental Consultants, we believe schools and businesses can best achieve their sustainability goals when operations, institutional behavior, curriculum &…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Unitas Engineering	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “With a combination of engineering knowledge, building development experience, and business acumen, Unitas brings an unparalleled combination of skills that will serve as a…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	The Pelorus Group	Exact match	Philadelphia, United StatesHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match “Construction Consultants & Project Managers” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Hexagon Studio Architects	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Blupath Design	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match “BluPath, an architecture and design firm founded in 2003 by Laura Blau, and Paul Thompson, works closely with clients to design simple, elegant and environmentally sensitive…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	E-Built INC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	11-50	1 contacts →
	Exact match “E-Built is a full service Design-Build and General Contracting firm located in Philadelphia.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Home Science, LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “Home Science, LLC provides design and assessment services in the green building and home energy fields.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Elliott Energy	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “Elliott Energy is an energy consulting firm focusing mainly on energy audits, building modeling, benchmarking, and project management.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Alice K. Berman Associates, LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “Providing architecture, interior design and planning consulting to the corporate and non-profit community.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Rooted By Design LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “From brief consultation services through full service design, I guide clients through a streamlined design process, founded in eco-friendly practices.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Bhaumik Engineering LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Ease Sustainability Group	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “We are a collective of energy engineers and consultants who want to accelerate the energy transition and solve the biggest sustainability challenges facing us today.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	24 7 Design Group, LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “24/7 Design Group is a Philadelphia-based firm that provides architectural services and solutions to all our clients’ needs.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Holzraum System LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “We are passionate about reducing the embodied and operational footprint of your buildings and the Passive House benefits of health, comfort, craftsmanship, and net-zero…” Recorded in the RevenueBase company graph · Sep 28, 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 “green building consulting firms”. 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 23 of 51 green building consulting firms based in Philadelphia, United States

See the full list, filter by size, metro and specialty, and access 91 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Green building consulting firms based in Philadelphia, United States at a glance

As of Sep 28, 2026

30.2%Verified-email coverage

5.9Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Philadelphia, so it is reported there. Company counts and contact totals on this page are exact for Philadelphia, over 51 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 Philadelphia, United States whose business descriptions match “green building consulting firms” 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 91 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 September 28, 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.

Green building consulting firms by metro in the United States

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 “green building consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many green building consulting firms are there based in Philadelphia, United States?

RevenueBase identified 51 company matches for green building consulting firms associated with Philadelphia, United States as of September 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?

IEI Group, LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most green building consulting firms?

New York leads the United States with 276 company records, followed by Chicago (104) and Houston (102). Philadelphia has 51.

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 91 professional contacts with verified work emails tracked across these 51 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 September 28, 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.