Commercial Construction

Building spaces where communities work, learn, and thrive.

Sentry is a leading force in the commercial construction industry, delivering high-quality projects that meet the unique needs of businesses, institutions, and communities. From early planning through final turnover, our team ensures projects are completed on time, within budget, and to the highest standards.

Where We Help

Office Buildings & Tenant Improvements

K-12, Higher Ed and Technical Education Facilities

Senior Living & Healthcare Facilities

Recreation, Dining & Wellness Facilities

Retail & Mixed Use Buildings

Civic & Municipal Buildings

Delivery & Self-Perform

Sentry offers General Contracting, Construction Management, Design-Build, and EPC delivery models. What sets us apart is our ability to self-perform critical scopes, giving owners greater schedule control and predictable results. Divisions include Electrical, Mechanical (Plumbing/HVAC), Controls & Automation (UL-listed OEM panels), Structural Steel, Manufacturing, Crane Service, and FieldWorks.

Commercial Construction Services

General Contracting

Full service engineering, procurement, and construction

Electrical

Licensed electricians, electrical engineers, and project managers

Mechanical

Plumbing and mechanical contractors and plumbing service

Structural Steel

Structural steel building design and construction

Safety & Quality

Our commercial construction work often happens in public or occupied spaces, where safety and cleanliness are non-negotiable. Sentry enforces site separation, phased construction, and off-hours scheduling when needed. QA/QC measures verify MEP systems, finishes, and life safety equipment before turnover, ensuring a smooth opening day.

Commercial Construction Projects

The Lofts at Willow Creek | Watertown, SD

Sinclair Square | Watertown, SD

502 Main Project | Lake Norden, SD

Challenges We Solve

Delivering projects in occupied schools, offices, and healthcare facilities
Managing fast-track and phased turnovers without budget overruns
Coordinating brand standards and approvals across multiple stakeholders
Addressing trade capacity and supply chain risks
Ensuring consistent quality across multi-site or repeat program work

Areas We Serve

We manage and self-perform commercial construction projects across South Dakota and the Midwest.