STO Building Group is a privately-owned family of top-tier construction builders operating as a collaborative network of specialized companies. The group employs over 5,700 people across 54 offices in the United States, Canada, the United Kingdom, Ireland, and the Netherlands. Its structure pools resources and shares best practices across its constituent firms.
The company's work spans several industry verticals including technology and mission-critical facilities, alongside healthcare, hospitality, and broader construction. Its culture emphasizes a commitment to working as one unified team and maintaining a genuine partnership with clients. The group focuses on innovative approaches to complex challenges with an emphasis on safety, quality, and sustainability.






