Company lists · Data refreshed September 2026

Top 25 Sustainable architecture firms based in Philadelphia, United States

Name: Sustainable architecture 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 18, 2026 51 companies tracked

RevenueBase identified 51 sustainable architecture firms headquartered in Philadelphia, United States as of September 2026 and tracks 350 professional contacts across them, including 152 with verified work emails. New York is the largest hub.

This list covers sustainable architecture 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 18, 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 18, 2026 86% judged on-target in blind review

51Companies

350Contacts tracked

152Verified emails

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

Ranked by team size

Top 25 of 51 sustainable architecture firms based in Philadelphia, United States, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable architecture 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	Digsau	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	11-50	41 contacts →
	Partial evidence “DIGSAU practices contemporary architecture, urbanism and environmental design.” Source: RevenueBase Database · checked Sep 18, 2026
2	IEI Group, LTD	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 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 18, 2026
3	CBP Architects	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 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 18, 2026
4	Innova Services Corporation	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	11-50	23 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 18, 2026
5	RE Vision Architecture	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 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 18, 2026
6	SMP Architects	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	11-50	15 contacts →
	Partial evidence “Attention to environmental concerns and historic, cultural, and architectural contexts are the hallmarks of our firm.” Source: RevenueBase Database · checked Sep 18, 2026
7	O Z Collaborative	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	11-50	12 contacts →
	Partial 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 18, 2026
8	Toner Architects	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 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 18, 2026
9	Krieger Associates Architects INC	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 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 18, 2026
10	BKP Architects P.C	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	11-50	7 contacts →
	Indirect evidence “Welcome to BKP Architects, where we confidently advocate practicality in equal measure with creativity.” Source: RevenueBase Database · checked Sep 18, 2026
11	Onion Flats Architecture	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	1-10	5 contacts →
	Partial 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 18, 2026
12	Millan Architects	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	1-10	4 contacts →
	Strong 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 18, 2026
13	Woodcock Design	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 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 18, 2026
14	Morrissey Collective	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	1-10	4 contacts →
	Partial evidence “Morrissey is a full-service interior design and architecture studio working with a diverse array of clients.” Source: RevenueBase Database · checked Sep 18, 2026
15	Mark B. Thompson Associates, PC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	1-10	3 contacts →
	Indirect evidence “Mark B.” Source: RevenueBase Database · checked Sep 18, 2026
16	Avlv Architecture & Development	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	1-10	3 contacts →
	Strong 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 18, 2026
17	Lauren Thomsen Design	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	1-10	3 contacts →
	Partial evidence “Lauren Thomsen Design is an award winning Philadelphia-based architectural design firm.” Source: RevenueBase Database · checked Sep 18, 2026
18	Studio 111 Architecture	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 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 18, 2026
19	Vsba Architects & Planners	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	11-50	3 contacts →
	Indirect evidence “VSBA Architects & Planners serve academic, health care, museum, civic, and institutional clients, offering a full range of services from planning and programming through design…” Source: RevenueBase Database · checked Sep 18, 2026
20	In Earnest Design	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	1-10	2 contacts →
	Partial evidence “In Earnest Design specializes in residential and mixed-use architecture of all sizes.” Source: RevenueBase Database · checked Sep 18, 2026
21	Layer Architecture	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	1-10	2 contacts →
	Partial evidence “LAYER Architecture is a nimble, hands-on, full-service design practice.” Source: RevenueBase Database · checked Sep 18, 2026
22	Hexagon Studio Architects	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 18, 2026
23	Blupath Design	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	1-10	2 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 18, 2026
24	Nicole Elizabeth Intrs Boutique Interior Design Firm	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	1-10	2 contacts →
	Indirect evidence “Your space should be as unrepeatable as your story.” Source: RevenueBase Database · checked Sep 18, 2026
25	E-Built INC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 18, 2026	11-50	1 contacts →
	Indirect evidence “E-Built is a full service Design-Build and General Contracting firm located in Philadelphia.” Source: RevenueBase Database · checked Sep 18, 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 architecture 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 architecture firms.
Partial evidence: Its own public description names part of sustainable architecture firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable architecture 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 51 sustainable architecture firms based in Philadelphia, United States

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

As of Sep 18, 2026

43.4%Verified-email coverage

6.9Average contacts per company

1-10Median size (employees)

552.9%Largest-city concentration · New York

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

11-50

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among sustainable architecture 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 architecture 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 architecture 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 architecture 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, 152 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 18, 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 architecture 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 architecture 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 architecture firms are there based in Philadelphia, United States?

RevenueBase identified 51 sustainable architecture 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?

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

Which city has the most sustainable architecture firms?

New York leads with 282 headquartered companies, followed by Los Angeles (131) and Seattle (128).

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 152 verified decision-maker contacts tracked across these 51 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 18, 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.