Site Work

Keystone Site Work is a full service civil construction company with experience in Federal, State, County, Commercial, Industrial and Institutional projects. Keystone Site Work performs site preparation, earth work, asphalt paving, base paving, private and public sector utilities, detention ponds, surveying and layout.

Our company was formed in the state of Texas in 2001 as Stewart Builders, Inc. d.b.a. Keystone Site Work. Later in 2007 Keystone Site Work added site utilities to their service package to become a full civil construction company.

Keystone provides their clients well managed, quality, cost effective projects every time. Our team of project managers and field superintendents are dedicated to total quality management which incorporates a free flow of detailed information between the client and contractor. This team philosophy is critical to a successful project! Keystone is a structured organization exceeding the goals of the client.

Safety for our company is of upmost importance. Keystone is dedicated to getting everyone home safe at the end of every day. Our training and instruction includes identifying and overcoming the various hazards to each construction project. Keystone employees work hard to provide an incident and injury free work environment for everyone. Employees are responsible and held accountable for their own safety and safety of others.


Houston Methodist Hospital No. 8 Campus

172,000 Cubic Yards Excavation and 700,000 Square Feet of lime stabilized sub-grade

Texas A&M at Galveston Student Housing - Operation Seawolf

Operation Seawolf, excavation and stabilized sub-grade.  

ALDI Distribution Center

Excavation (98,000 cubic yards) and backfill (165,000 cubic yards).

Houston Country Club Parking Garage

Excavation (119,000 cubic yards) and backfill (38,500 cubic yards) for driving range on top of parking garage.  

Baker Hughes Joint Facility

14,944 s.f. 1-story office building connected to the workshop, and new support and maintenance buildings.

The Moran Building Project

Storm Tech underground detention system

Texas Chenier Complex Winnie Depot

Design build (USGBC certified LEED Silver) Facility located on approximately 21.8 acres in Winnie, TX