Company lists · Data refreshed September 2026
Top 25 Architecture firms based in Philadelphia, United States
RevenueBase identified 279 architecture firms headquartered in Philadelphia, United States as of September 2026 and tracks 4,822 professional contacts across them, including 2,711 with verified work emails. New York is the largest hub.
This list covers 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 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.
The 25 largest architecture firms based in Philadelphia, United States
Ranked by team size| # | Company | RevenueBase Smart Search | Contacts | ||
|---|---|---|---|---|---|
| 1 | Indirect evidence | 1,264 contacts → | |||
“Since our founding more than five decades ago, our clients trust Pennoni’s commitment to elevating the impact of projects on our communities.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | Strong evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 3 | Indirect evidence | 316 contacts → | |||
“Ballinger's Philadelphia-based, integrated team of architects, engineers, planners, and interior designers works with visionary institutions to create places that empower those…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | Strong evidence | 249 contacts → | |||
“FCA is a full-service architectural and design firm.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | Indirect evidence | 180 contacts → | |||
“WRT is a team of planners, urban designers, architects, and landscape architects.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | Strong evidence | 162 contacts → | |||
“OLIN is dedicated to affecting positive change through landscape architecture, urban design and planning.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | Indirect evidence | 147 contacts → | |||
“Kling Stubbins was acquired by Jacobs in 2011.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | Indirect evidence | 103 contacts → | |||
“O’Donnell & Naccarato’s structural engineering practice has grown from a 3-person company in 1981 into a national firm of over 120 people spread over ten offices.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | Indirect evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 10 | Strong evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 11 | Strong evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 12 | Indirect evidence | 53 contacts → | |||
“Formcraft is a design and build firm creating successful workplace strategies, translating companies' visions into engaging workplaces where business and people thrive.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | Indirect evidence | 42 contacts → | |||
“The Lighting Practice transforms ordinary spaces into places that are extraordinary, captivating, and memorable.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | Indirect evidence | 41 contacts → | |||
“Keast & Hood is a WBE/WOSB structural engineering firm founded in 1953 and located in Philadelphia, PA.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | Strong evidence | 41 contacts → | |||
“DIGSAU practices contemporary architecture, urbanism and environmental design.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | Indirect evidence | 40 contacts → | |||
“ECBuild is a construction management firm created specifically to meet the changing needs of our clients across a variety of industries.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | Indirect evidence | 38 contacts → | |||
“What’s the story of your work?” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | Strong evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 19 | Strong evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 20 | Strong evidence | 28 contacts → | |||
“An experience design firm focused on serving schools, museums, hospitals, and corporate clients through architecture, exhibition design, and graphic design.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | Strong evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 22 | Indirect evidence | 26 contacts → | |||
“We are a team of passionate professionals who bring varied experience and steadfast dedication to every project.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | Strong evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 24 | Strong evidence | 24 contacts → | |||
“PZS Architects provides a complete range of architectural, interior design and planning services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | Indirect evidence | 24 contacts → | |||
“MJ Settelen Construction is a Philadelphia-based firm providing General Contracting, Construction Management, Design-Build, Preconstruction, Consulting, and Facilities Services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
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 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 architecture firms.
- Partial evidence
- Its own public description names part of architecture firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name 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 279 architecture firms based in Philadelphia, United States
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Architecture firms based in Philadelphia, United States at a glance
As of Sep 6, 2026Companies by employee count
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 279 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 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 “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 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 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, 2,711 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 firms by metro in the United States
- Architecture firms in New York2473
- Architecture firms in Los Angeles1046
- Architecture firms in Chicago781
- Architecture firms in San Francisco682
- Architecture firms in Houston657
- Architecture firms in Miami648
- Architecture firms in Austin584
- Architecture firms in Seattle564
- Architecture firms in Dallas560
- Architecture firms in Atlanta537
- Architecture firms in Denver445
- Architecture firms in Portland439
- Architecture firms in San Diego391
- Architecture firms in Boston349
- Architecture firms in Washington301
- Architecture firms in Phoenix300
- Architecture firms in Philadelphia279
- Architecture firms in Brooklyn259
- Architecture firms in Charlotte253
- Architecture firms in Nashville230
- Architecture firms in Minneapolis223
- Architecture firms in Tampa215
- Architecture firms in San Antonio205
- Architecture firms in Orlando195
- Architecture firms in Scottsdale193
- Architecture firms in Las Vegas188
- Architecture firms in Columbus176
- Architecture firms in Oakland170
- Architecture firms in Raleigh166
- Architecture firms in San Jose160
- Architecture firms in Irvine156
- Architecture firms in Indianapolis150
- Architecture firms in Cincinnati147
- Architecture firms in Pittsburgh145
- Architecture firms in Fort Lauderdale140
- Architecture firms in Salt Lake City139
- Architecture firms in Birmingham138
- Architecture firms in Baltimore134
- Architecture firms in Kansas City129
- Architecture firms in Richmond125
- Architecture firms in Jacksonville118
- Architecture firms in New Orleans116
- Architecture firms in Charleston115
- Architecture firms in Cleveland111
- Architecture firms in Greenville105
- Architecture firms in Milwaukee103
- Architecture firms in Pasadena101
- Architecture firms in Sacramento100
- Architecture firms in Fort Worth99
- Architecture firms in Sarasota99
- Architecture firms in Omaha98
- Architecture firms in Honolulu93
- Architecture firms in Berkeley92
- Architecture firms in Santa Monica92
- Architecture firms in Grand Rapids91
- Architecture firms in Lexington91
- Architecture firms in Boca Raton90
- Architecture firms in Boulder90
- Architecture firms in New York City89
- Architecture firms in Louisville88
- Architecture firms in Alexandria87
- Architecture firms in Columbia83
- Architecture firms in Detroit83
- Architecture firms in Oklahoma City82
- Architecture firms in Arlington81
- Architecture firms in Newport Beach81
- Architecture firms in Tulsa81
- Architecture firms in Wilmington81
- Architecture firms in Santa Barbara80
- Architecture firms in West Palm Beach80
- Architecture firms in Tucson79
- Architecture firms in Long Beach78
- Architecture firms in Madison78
- Architecture firms in Springfield77
- Architecture firms in Costa Mesa76
- Architecture firms in St Louis75
- Architecture firms in Albuquerque74
- Architecture firms in Boise73
- Architecture firms in Knoxville72
- Architecture firms in Naples72
- Architecture firms in Baton Rouge70
- Architecture firms in Cambridge69
- Architecture firms in Coral Gables69
- Architecture firms in Lafayette68
- Architecture firms in Bozeman66
- Architecture firms in St. Louis65
- Architecture firms in Franklin62
- Architecture firms in Rochester60
- Architecture firms in Bellevue59
- Architecture firms in Chattanooga59
- Architecture firms in Culver City58
- Architecture firms in Marietta58
- Architecture firms in Charlottesville56
- Architecture firms in Memphis54
- Architecture firms in Annapolis53
- Architecture firms in Asheville53
- Architecture firms in Savannah53
- Architecture firms in Durham52
- Architecture firms in Miami Beach52
- Architecture firms in Palo Alto52
- Architecture firms in Fort Myers51
- Architecture firms in Jackson51
- Architecture firms in Winter Park51
- Architecture firms in Plano50
- Architecture firms in Spokane50
- Architecture firms in Concord49
- Architecture firms in Lakewood47
- Architecture firms in Providence47
- Architecture firms in Somerville47
- Architecture firms in West Hollywood47
- Architecture firms in Alpharetta46
- Architecture firms in San Rafael46
- Architecture firms in Bend45
- Architecture firms in Beverly Hills45
- Architecture firms in Colorado Springs45
- Architecture firms in Glendale45
- Architecture firms in Fort Collins44
- Architecture firms in Greenwich44
- Architecture firms in Reno44
- Architecture firms in San Luis Obispo44
- Architecture firms in Ann Arbor43
- Architecture firms in Brentwood43
- Architecture firms in Lincoln43
- Architecture firms in Roswell43
- Architecture firms in Virginia Beach43
- Architecture firms in Carmel42
- Architecture firms in Rockville42
- Architecture firms in Saint Louis42
- Architecture firms in Salem42
- Architecture firms in Delray Beach41
- Architecture firms in Des Moines41
- Architecture firms in Little Rock41
- Architecture firms in Littleton41
- Architecture firms in Overland Park41
- Architecture firms in Syracuse41
- Architecture firms in Buffalo40
- Architecture firms in Eugene40
- Architecture firms in Fairfax40
- Architecture firms in Mesa40
- Architecture firms in Santa Rosa40
- Architecture firms in Englewood39
- Architecture firms in Laguna Beach39
- Architecture firms in Lancaster39
- Architecture firms in Santa Fe39
- Architecture firms in Tacoma39
- Architecture firms in Tempe39
- Architecture firms in Albany38
- Architecture firms in Aspen38
- Architecture firms in Fort Wayne38
- Architecture firms in York38
- Architecture firms in El Paso37
- Architecture firms in Jersey City37
- Architecture firms in New Haven37
- Architecture firms in Richardson37
- Architecture firms in Clearwater36
- Architecture firms in Evanston36
- Architecture firms in Walnut Creek36
- Architecture firms in Carlsbad35
- Architecture firms in Katy35
- Architecture firms in Lubbock35
- Architecture firms in Mclean35
- Architecture firms in Sausalito35
- Architecture firms in Solana Beach35
- Architecture firms in Troy35
- Architecture firms in Wichita35
- Architecture firms in Burlington34
- Architecture firms in Doral34
- Architecture firms in Fresno34
- Architecture firms in Henderson34
- Architecture firms in Norwalk34
- Architecture firms in Sioux Falls34
- Architecture firms in Auburn33
- Architecture firms in Fayetteville33
- Architecture firms in Gainesville33
- Architecture firms in Kirkland33
- Architecture firms in St Petersburg33
- Architecture firms in Tallahassee33
- Architecture firms in Wayne33
- Architecture firms in Westport33
- Architecture firms in Newark32
- Architecture firms in Princeton32
- Architecture firms in Bethesda31
- Architecture firms in Centennial31
- Architecture firms in Danville31
- Architecture firms in Dayton31
- Architecture firms in Duluth31
- Architecture firms in Jupiter31
- Architecture firms in Fargo30
- Architecture firms in Greensboro30
- Architecture firms in Hollywood30
- Architecture firms in Pensacola30
- Architecture firms in Plymouth30
- Architecture firms in Roseville30
- Architecture firms in Venice30
- Architecture firms in White Plains30
- Architecture firms in Akron29
- Architecture firms in Anchorage29
- Architecture firms in Aurora29
- Architecture firms in Gilbert29
- Architecture firms in Palm Beach29
- Architecture firms in Portsmouth29
- Architecture firms in Stamford29
- Architecture firms in Canton28
- Architecture firms in Medford28
- Architecture firms in Naperville28
- Architecture firms in Norfolk28
- Architecture firms in Park City28
- Architecture firms in The Woodlands28
- Architecture firms in Athens27
- Architecture firms in Decatur27
- Architecture firms in Huntington Beach27
- Architecture firms in La Jolla27
- Architecture firms in Montgomery27
- Architecture firms in Orange27
- Architecture firms in San Clemente27
- Architecture firms in Saratoga Springs27
- Architecture firms in Torrance27
- Architecture firms in Weston27
- Architecture firms in Woodstock27
- Architecture firms in Anaheim26
- Architecture firms in Bainbridge Island26
- Architecture firms in Burbank26
- Architecture firms in Cary26
- Architecture firms in Huntsville26
- Architecture firms in Metairie26
- Architecture firms in Mill Valley26
- Architecture firms in Saint Paul26
- Architecture firms in Santa Ana26
- Architecture firms in Sugar Land26
- Architecture firms in Woodland Hills26
- Architecture firms in Billings25
- Architecture firms in Hudson25
- Architecture firms in Manhattan Beach25
- Architecture firms in Mount Pleasant25
- Architecture firms in Newton25
- Architecture firms in Pompano Beach25
- Architecture firms in Riverside25
- Architecture firms in San Mateo25
- Architecture firms in Spring25
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 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 architecture firms are there based in Philadelphia, United States?
RevenueBase identified 279 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?
Pennoni, headquartered in Philadelphia, tops this list with the largest team on record.
Which city has the most architecture firms?
New York leads with 2473 headquartered companies, followed by Los Angeles (1046) and Chicago (781).
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 2,711 verified decision-maker contacts tracked across these 279 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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Architecture firms by geography
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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.