Company lists · Data refreshed September 2026

Top 25 Sustainable design firms based in Philadelphia, United States

Name: Sustainable design 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 22, 2026 62 companies tracked

RevenueBase identified 62 sustainable design firms headquartered in Philadelphia, United States as of September 2026 and tracks 504 professional contacts across them, including 261 with verified work emails. New York is the largest hub.

This list covers sustainable design firms headquartered in Philadelphia, 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 22, 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 22, 2026 86% judged on-target in blind review

62Companies

504Contacts tracked

261Verified emails

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The 25 largest sustainable design firms based in Philadelphia, United States

Ranked by team size

Top 25 of 62 sustainable design firms based in Philadelphia, United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable design 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	Kierantimberlake	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	51-200	74 contacts →
	Indirect evidence “The alchemy of art, science, analysis, and intuition with regard to the built environment is our core mission.” Source: RevenueBase Database · checked Sep 22, 2026
2	Digsau	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	11-50	41 contacts →
	Partial evidence “DIGSAU practices contemporary architecture, urbanism and environmental design.” Source: RevenueBase Database · checked Sep 22, 2026
3	IEI Group, LTD	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	11-50	33 contacts →
	Partial evidence “IEI is a nationally recognized, award-winning, 20-person architecture, interior design and facilities planning firm based in Northern Liberties for last 20 years.” Source: RevenueBase Database · checked Sep 22, 2026
4	CLR Design	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	11-50	26 contacts →
	Indirect evidence “We are a team of passionate professionals who bring varied experience and steadfast dedication to every project.” Source: RevenueBase Database · checked Sep 22, 2026
5	PZS Architects	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	11-50	24 contacts →
	Partial evidence “PZS Architects provides a complete range of architectural, interior design and planning services.” Source: RevenueBase Database · checked Sep 22, 2026
6	CBP Architects	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	11-50	24 contacts →
	Partial evidence “CBP Architects is an architecture firm providing design services to governmental, educational, institutional and private sector clients.” Source: RevenueBase Database · checked Sep 22, 2026
7	RE Vision Architecture	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	11-50	19 contacts →
	Strong evidence “Re:Vision is a deep green architecture and sustainability consulting practice dedicated to the design of high-performance buildings and sustainable communities.” Source: RevenueBase Database · checked Sep 22, 2026
8	David Rubin Land Collective	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	11-50	16 contacts →
	Strong evidence “DAVID RUBIN Land Collective is driven by design empathy and emphasizes holistically-sustainable principles, with social sustainability leading the design effort.” Source: RevenueBase Database · checked Sep 22, 2026
9	SMP Architects	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	11-50	15 contacts →
	Indirect evidence “Attention to environmental concerns and historic, cultural, and architectural contexts are the hallmarks of our firm.” Source: RevenueBase Database · checked Sep 22, 2026
10	Tantillo Architecture LLC	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	14 contacts →
	Partial evidence “Tantillo Architecture is a high energy generalist architectural design firm focused on bringing innovative design strategies to commercial and residential clients.” Source: RevenueBase Database · checked Sep 22, 2026
11	Plant Group	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	14 contacts →
	Partial evidence “PLANT Group (People Learning About Nature Together) is an ecological design and engineering firm connecting humans and nature to enable climate adaptation and mitigation work.” Source: RevenueBase Database · checked Sep 22, 2026
12	O Z Collaborative	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	11-50	12 contacts →
	Indirect evidence “Rooted in West Philadelphia, O Z Collaborative creates architecture grounded in the complex realities of our clients, their stakeholders, and the communities they serve.” Source: RevenueBase Database · checked Sep 22, 2026
13	Studio Sustena	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	9 contacts →
	Partial evidence “Studio Sustena (formerly called Roofmeadow and Roofscapes, Inc.) provides "integrated site design," which blends landscape architecture with civil engineering to create…” Source: RevenueBase Database · checked Sep 22, 2026
14	Toner Architects	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	8 contacts →
	Partial evidence “Toner architects was founded with one singular goal in mind; collaborate with clients who enjoy the process of design, architecture, and building.” Source: RevenueBase Database · checked Sep 22, 2026
15	Krieger Associates Architects INC	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	8 contacts →
	Partial evidence “Krieger + Associates Architects Inc is an award-winning Philadelphia firm providing architectural, planning, and interior design services to residential, institutional, and…” Source: RevenueBase Database · checked Sep 22, 2026
16	Viridian Landscape Studio	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	5 contacts →
	Partial evidence “Viridian Landscape Studio is dedicated to the careful design and development of landscape architectural and ecological planning projects.” Source: RevenueBase Database · checked Sep 22, 2026
17	Onion Flats Architecture	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	5 contacts →
	Indirect evidence “Onion Flats Architecture focuses on community development, multidisciplinary thinking and making, high-performance building technologies and alternative construction methodologies.” Source: RevenueBase Database · checked Sep 22, 2026
18	Millan Architects	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	4 contacts →
	Partial evidence “Millan Architects is an architecture firm based in Philadelphia devoted to crafting thoughtful spaces of enduring beauty, lasting value and environmental sustainability.” Source: RevenueBase Database · checked Sep 22, 2026
19	Stanev Potts Architects	Indirect evidence	Philadelphia, United StatesHQ checked Sep 22, 2026	1-10	4 contacts →
	Indirect evidence “At Stanev Potts Architects, we are deeply committed to our vocation and to our clients.” Source: RevenueBase Database · checked Sep 22, 2026
20	KJO Architecture LLC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	4 contacts →
	Indirect evidence “KJO Architecture LLC is an architecture and planning studio in Philadelphia, Pennsylvania.” Source: RevenueBase Database · checked Sep 22, 2026
21	Woodcock Design	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	4 contacts →
	Partial evidence “Based out of 1518 Walnut St Suite 1308, Philadelphia, Woodcock Design is a full service, end-to-end architecture, planning and urban design firm.” Source: RevenueBase Database · checked Sep 22, 2026
22	Boyer Sudduth Environmental Consultants, LLC	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	4 contacts →
	Partial evidence “At Boyer Sudduth Environmental Consultants, we believe schools and businesses can best achieve their sustainability goals when operations, institutional behavior, curriculum &…” Source: RevenueBase Database · checked Sep 22, 2026
23	Mark B. Thompson Associates, PC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	3 contacts →
	Indirect evidence “Mark B.” Source: RevenueBase Database · checked Sep 22, 2026
24	Avlv Architecture & Development	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	3 contacts →
	Partial evidence “We are AVLV (Avolve), a vertically integrated sustainable architecture, development, and real estate firm built to do things differently.” Source: RevenueBase Database · checked Sep 22, 2026
25	Studio 111 Architecture	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	1-10	3 contacts →
	Partial evidence “Studio Architecture is a Philadelphia based design firm, providing service throughout the region.” Source: RevenueBase Database · checked Sep 22, 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: sustainable design 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 sustainable design firms.
Partial evidence: Its own public description names part of sustainable design firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable design 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 62 sustainable design firms based in Philadelphia, United States

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Sustainable design firms based in Philadelphia, United States at a glance

As of Sep 22, 2026

51.8%Verified-email coverage

8.1Average contacts per company

1-10Median size (employees)

519.4%Largest-city concentration · New York

Sep 22, 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 62 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 sustainable design 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 Philadelphia, United States whose own description of what they do matches “sustainable design 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 sustainable design 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 sustainable design firms, and records with no verified work email. Companies headquartered outside Philadelphia 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, 261 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 22, 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.

Sustainable design firms by metro in the United States

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 sustainable design 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 sustainable design firms are there based in Philadelphia, United States?

RevenueBase identified 62 sustainable design firms headquartered in Philadelphia, 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?

Kierantimberlake, headquartered in Philadelphia, tops this list with the largest team on record.

Which city has the most sustainable design firms?

New York leads with 322 headquartered companies, followed by Los Angeles (146) and Seattle (121).

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 261 verified decision-maker contacts tracked across these 62 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 22, 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.