Company lists · Data refreshed September 2026

Top 25 Architecture design companies based in Philadelphia, United States

Name: Architecture design companies based in Philadelphia, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 117 companies tracked

RevenueBase identified 117 architecture design companies headquartered in Philadelphia, United States as of September 2026 and tracks 1,463 professional contacts across them, including 835 with verified work emails. New York is the largest hub.

This list covers architecture design companies 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 6, 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 6, 2026 86% judged on-target in blind review

117Companies

1,463Contacts tracked

835Verified emails

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The 25 largest architecture design companies based in Philadelphia, United States

Ranked by team size

Top 25 of 117 architecture design companies based in Philadelphia, United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to architecture design companies: 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	Ewingcole	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	201-500	509 contacts →
	“EwingCole is a nationally recognized architecture, engineering, interior design, and planning firm with offices in Atlanta, Baltimore, Charlotte, Fort Worth, Irvine, New York…” Source: company website · checked Sep 6, 2026
2	Kierantimberlake	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	51-200	74 contacts →
	“The alchemy of art, science, analysis, and intuition with regard to the built environment is our core mission.” Source: company website · checked Sep 6, 2026
3	Jkrp Architects	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	51-200	70 contacts →
	“Residential \| Entertainment \| Retail \| Self Storage JKRP Architects is a full-service architectural firm dedicated to bringing client visions to life.” Source: company website · checked Sep 6, 2026
4	Jacobswyper Architects	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	51-200	63 contacts →
	“JacobsWyper Architects is a certified WBE architectural, planning and interior design firm with locations in Philadelphia, PA, Raleigh, N.C, and Austin, TX.” Source: company website · checked Sep 6, 2026
5	Digsau	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	41 contacts →
	“DIGSAU practices contemporary architecture, urbanism and environmental design.” Source: company website · checked Sep 6, 2026
6	Blackney Hayes	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	38 contacts →
	“What’s the story of your work?” Source: company website · checked Sep 6, 2026
7	IEI Group, LTD	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	33 contacts →
	“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: company website · checked Sep 6, 2026
8	Cosciamoos Architecture	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	32 contacts →
	“CosciaMoos Architecture, founded by principals Sergio Coscia and David Moos, provides architectural design and planning across a broad range of project types, serving clients…” Source: company website · checked Sep 6, 2026
9	Kelly Maiello Architects	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	26 contacts →
	“Kelly Maiello Architects (formerly Kelly/Maiello) has provided architectural and planning services in Philadelphia and the region for nearly 50 years.” Source: company website · checked Sep 6, 2026
10	CBP Architects	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	24 contacts →
	“CBP Architects is an architecture firm providing design services to governmental, educational, institutional and private sector clients.” Source: company website · checked Sep 6, 2026
11	PZS Architects	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	24 contacts →
	“PZS Architects provides a complete range of architectural, interior design and planning services.” Source: company website · checked Sep 6, 2026
12	Wulff Architects	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	23 contacts →
	“Named after its founder and President, Al Wulff, Wulff Architects was envisioned in 1992 as a community of architects and designers working together to advance both commercial…” Source: company website · checked Sep 6, 2026
13	DAS Architects, INC	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	23 contacts →
	“DAS Architects, one of the country’s top design firms, has developed an exceptional resume of hospitality, retail, corporate and residential projects.” Source: company website · checked Sep 6, 2026
14	MGA Partners	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	22 contacts →
	“OUR FIRM \| Based in Philadelphia, MGA Partners is a nationally recognized firm distinguished for architecture that is considered, crafted, and resonant with its place.” Source: company website · checked Sep 6, 2026
15	Erdy Mchenry Architecture, LLC	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	19 contacts →
	“Erdy McHenry Architecture is a Philadelphia-based design studio.” Source: company website · checked Sep 6, 2026
16	Daroff Design	Strong evidence	Philadelphia, United StatesHQ checked Sep 6, 2026	11-50	18 contacts →
	“Daroff Design Inc + DDI Architects, PC (DDI), is an award winning, internationally acclaimed interiors, architecture, branding, and graphic design firm.” Source: company website · checked Sep 6, 2026
17	Tantillo Architecture LLC	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	1-10	14 contacts →
	“Tantillo Architecture is a high energy generalist architectural design firm focused on bringing innovative design strategies to commercial and residential clients.” Source: company website · checked Sep 6, 2026
18	Hellyer Lewis Smith, INC	Strong evidence	Philadelphia, United StatesHQ checked Sep 6, 2026	11-50	14 contacts →
	“Hellyer Lewis Smith, Inc, is an architectural and interior design firm that has been serving the corporate community since its inception in 1984.” Source: company website · checked Sep 6, 2026
19	Charles Matsinger Associates	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	13 contacts →
	“We are "The No-Attitude Architects,” a full service architectural firm committed to providing innovative architecture that enhances our clients’ quality of life where they live…” Source: company website · checked Sep 6, 2026
20	O Z Collaborative	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	12 contacts →
	“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: company website · checked Sep 6, 2026
21	Harman Deutsch Ohler Architecture	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	11 contacts →
	“harman deutsch ohler architecture is a service-oriented architecture and design firm rooted in development, catering to property investors, builders and developers.” Source: company website · checked Sep 6, 2026
22	Atrium Design Group	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	1-10	11 contacts →
	“Atrium Design Group is an architecture & planning company based out of 8404 Donnybrook Dr, Chevy Chase, Maryland, United States.” Source: company website · checked Sep 6, 2026
23	Varenhorst	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	11-50	10 contacts →
	“Varenhorst is an award-winning architectural firm based out of Philadelphia, Pennsylvania.” Source: company website · checked Sep 6, 2026
24	Studio IQL	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	1-10	8 contacts →
	“Studio IQL is the result of 20 years of collaborative design work.” Source: company website · checked Sep 6, 2026
25	Toner Architects	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 6, 2026	1-10	8 contacts →
	“Toner architects was founded with one singular goal in mind; collaborate with clients who enjoy the process of design, architecture, and building.” Source: company website · checked Sep 6, 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: architecture design companies. 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 architecture design companies.
Partial evidence: Its own public description names part of architecture design companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name architecture design companies. 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 117 architecture design companies based in Philadelphia, United States

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Architecture design companies based in Philadelphia, United States at a glance

As of Sep 6, 2026

57.1%Verified-email coverage

12.5Average contacts per company

1-10Median size (employees)

865.8%Largest-city concentration · New York

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Philadelphia, over 117 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 architecture design companies, 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 “architecture design companies”. 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 architecture design companies), 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 architecture design companies, 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, 835 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 6, 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.

Architecture design companies 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 architecture design companies, 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 architecture design companies are there based in Philadelphia, United States?

RevenueBase identified 117 architecture design companies 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?

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

Which city has the most architecture design companies?

New York leads with 1013 headquartered companies, followed by Los Angeles (420) and Chicago (311).

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 835 verified decision-maker contacts tracked across these 117 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 6, 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.