About Us

Triangle Associates, Inc. was founded in 1918 as George Datema & Sons and has grown into an award-winning leader in construction management, general contracting, and design/build services. Rooted in Grand Rapids, Michigan, Triangle blends a strong tradition of craftsmanship and integrity with the latest technology and project delivery methods.

We are proud to build more than just exceptional facilities—we build lasting relationships, strong communities, and a team-driven culture. Our vision has always centered on leading the industry with honesty, quality, and innovation. That commitment is reflected in the dedication of our people and the trust of the clients we serve.

Services : Construction Management, Design Build, General Contracting, Self-Perform Carpentry, Project Planning, Sustainable Building, etc.

Markets Serviced: K-12 Education, Civic/Municipal, Higher Education, Healthcare, Commercial, Retail, Self-perform Carpentry and General Trades.