> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/companies-in/philadelphia-pa/architecture-and-planning/ # Architecture Firms in Philadelphia, PA The bigger architecture firms headquartered in Philadelphia, PA, with what they do, their sizes and how to reach their people. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** Among the architecture firms counted in Philadelphia, PA, the biggest by headcount range include One Global Design, Ewingcole and Ballinger. They are mostly very small: 79% have 50 or fewer employees. ## Which architecture firms are in Philadelphia? Among the companies whose public profile lists Architecture and Planning as their industry and Philadelphia, PA as their headquarters, the biggest by headcount range include One Global Design, Ewingcole, Ballinger, Caoba and Dark Matter U. Names link to a company profile where we have one. | Company | Employees | | --- | --- | | One Global Design | 501 to 1,000 | | Ewingcole | 201 to 500 | | Ballinger | 201 to 500 | | Caoba | 201 to 500 | | Dark Matter U | 201 to 500 | | Olin | 51 to 200 | | Kierantimberlake | 51 to 200 | | Wrt | 51 to 200 | | Formcraft | 51 to 200 | | Jacobswyper Architects | 51 to 200 | | Jkrp Architects | 51 to 200 | | L2partridge, LLC Now Stantec | 51 to 200 | | Smps Philadelphia | 51 to 200 | | Bill Curran Design | 51 to 200 | | The Lighting Practice | 11 to 50 | | The Martin Architectural Group | 11 to 50 | | Andropogon Associates | 11 to 50 | | Digsau | 11 to 50 | | Cosciamoos Architecture | 11 to 50 | | Das Architects | 11 to 50 | | Voith & Mactavish Architects LLP | 11 to 50 | | Iei Group | 11 to 50 | | Re Vision Architecture | 11 to 50 | | Blackney Hayes Architects | 11 to 50 | | David Rubin Land Collective | 11 to 50 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## What do architecture firms in Philadelphia do? Architecture and Planning is a broad label. The most common NAICS codes among them are 541310 (50%), 541410 (25%) and 541490 (8%). **Figure: What architecture firms in Philadelphia do.** Bars for the share of counted architecture firms with each code: 541310 50%, 541410 25%, 541490 8%, 541618 8%, 541690 8%. *Share of counted architecture firms in Philadelphia by their NAICS code.* [NAICS 541310](https://enrich.chat/naics/541310/)[NAICS 541410](https://enrich.chat/naics/541410/) ## How big are they? 79% of the architecture firms counted in Philadelphia have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of architecture firms in Philadelphia.** Seven columns for the share of counted architecture firms in Philadelphia in each employee range: 11 to 50 79%, 51 to 200 13%, 201 to 500 6%, 501 to 1,000 1%, 1,001 to 5,000 0%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted architecture firms in Philadelphia in each employee range.* ## How do you reach the people at architecture firms in Philadelphia? The people to talk to are usually principals and operations leaders. Build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the architecture firms in Philadelphia, PA ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the principals and operations leaders at architecture firms in Philadelphia, PA, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore Other industries in Philadelphia: [Real Estate Companies](https://enrich.chat/companies-in/philadelphia-pa/real-estate/)[Hospitals and Health Care Organizations](https://enrich.chat/companies-in/philadelphia-pa/hospitals-and-health-care/)[Construction Companies](https://enrich.chat/companies-in/philadelphia-pa/construction/)[Nonprofit Organizations](https://enrich.chat/companies-in/philadelphia-pa/non-profit-organizations/)[Advertising Agencies](https://enrich.chat/companies-in/philadelphia-pa/advertising-services/)[Software Companies](https://enrich.chat/companies-in/philadelphia-pa/software-development/)[Law Firms](https://enrich.chat/companies-in/philadelphia-pa/law-practice/)[IT Services Companies](https://enrich.chat/companies-in/philadelphia-pa/it-services-and-it-consulting/)[Consulting Firms](https://enrich.chat/companies-in/philadelphia-pa/business-consulting-and-services/)[Financial Services Companies](https://enrich.chat/companies-in/philadelphia-pa/financial-services/)[Education Organizations](https://enrich.chat/companies-in/philadelphia-pa/education-administration-programs/)[Technology and Internet Companies](https://enrich.chat/companies-in/philadelphia-pa/technology-information-and-internet/)[Staffing and Recruiting Firms](https://enrich.chat/companies-in/philadelphia-pa/staffing-and-recruiting/)[Insurance Companies](https://enrich.chat/companies-in/philadelphia-pa/insurance/)[Facilities Services Companies](https://enrich.chat/companies-in/philadelphia-pa/facilities-services/)[Food and Beverage Manufacturers](https://enrich.chat/companies-in/philadelphia-pa/food-and-beverage-manufacturing/)[All of Philadelphia](https://enrich.chat/companies-in/philadelphia-pa/) Architecture Firms in other cities: [New York, NY](https://enrich.chat/companies-in/new-york-ny/architecture-and-planning/)[Los Angeles, CA](https://enrich.chat/companies-in/los-angeles-ca/architecture-and-planning/)[San Francisco, CA](https://enrich.chat/companies-in/san-francisco-ca/architecture-and-planning/)[Chicago, IL](https://enrich.chat/companies-in/chicago-il/architecture-and-planning/)[Seattle, WA](https://enrich.chat/companies-in/seattle-wa/architecture-and-planning/)[Denver, CO](https://enrich.chat/companies-in/denver-co/architecture-and-planning/)[Boston, MA](https://enrich.chat/companies-in/boston-ma/architecture-and-planning/)[San Diego, CA](https://enrich.chat/companies-in/san-diego-ca/architecture-and-planning/)[Dallas, TX](https://enrich.chat/companies-in/dallas-tx/architecture-and-planning/)[Portland, OR](https://enrich.chat/companies-in/portland-or/architecture-and-planning/) ## Frequently asked questions ### Which are the biggest architecture firms in Philadelphia? Among those counted, they include One Global Design, Ewingcole, Ballinger, Caoba and Dark Matter U, ranked by headcount range. ### How big are architecture firms in Philadelphia? 79% of those counted have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. ### Which companies count as architecture and planning? Companies whose public profile lists Architecture and Planning as their industry and whose headquarters are in Philadelphia, PA. ## Try this prompt Find the people at architecture firms in Philadelphia ```text Use www.enrich.chat to find the principals and operations leaders at architecture firms in Philadelphia, PA, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Real Estate Companies in Philadelphia](https://enrich.chat/companies-in/philadelphia-pa/real-estate/) - [Hospitals and Health Care Organizations in Philadelphia](https://enrich.chat/companies-in/philadelphia-pa/hospitals-and-health-care/) - [Construction Companies in Philadelphia](https://enrich.chat/companies-in/philadelphia-pa/construction/) - [Nonprofit Organizations in Philadelphia](https://enrich.chat/companies-in/philadelphia-pa/non-profit-organizations/) - [Architecture Firms in New York](https://enrich.chat/companies-in/new-york-ny/architecture-and-planning/) - [Architecture Firms in Los Angeles](https://enrich.chat/companies-in/los-angeles-ca/architecture-and-planning/) - [Architecture Firms in San Francisco](https://enrich.chat/companies-in/san-francisco-ca/architecture-and-planning/) - [Architecture Firms in Chicago](https://enrich.chat/companies-in/chicago-il/architecture-and-planning/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)