Building 21 Information
Summary
Building 21 is a private company that has been in the industry for 14 years. The company currently specializes in the Nonprofit Organization Management area. Its headquarters is located at Philadelphia, Pennsylvania, USA. The number of employees ranges from 25 to 100. The annual revenue of Building 21 varies between 5.0M and 25M. Total funding of the company - $150K. To connect with Building 21 employee register on SignalHire.
Organization Website | building21.org |
Social Links |    |
Industries | |
Headquarters Location | Philadelphia, US |
Employees Size | 10-50 employees |
Specialties | Competency-based Education, School Startup, Professional Development, Consulting, School Operations, Workforce Development |
SIC Code | 8300 |
DMA Code | Delaware Valley |
Founded | 2013 |
Estimated Annual Revenue | $5.0M - 25M |
Operating Status | Independent Company |
Estimated Website Traffic
The chart shows a growth in traffic to the building21.org website. In December, traffic increased to 7546, compared to 7437 in the previous month. The highest traffic in 2025 was recorded in July, reaching 8760 visits.
Employees Turnover 4 quarter 2025
Length of Employment
Employee tenure at Building 21 shows a diverse range of experience levels:
10% have been with the company for less than 1 year10% for 1–2 years20% for 3–4 years15% for 5–7 years25% for 8–10 years20% have over 11 years of service at Building 21
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