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 1504066038

Houston Methodist Hospital No. 8 Campus

About This Project Customer: Vaughn Construction The Houston Methodist Hospital No. 8 Campus project is made up of a Medical Office Building, Central Utility Plant, and Hospital that consist of 172,390 CY of excavation (cut to fill). Houston Methodist Hospital No. 8 Campus also entails 700,000 SF of lime stabilizedRead more


Texas A&M at Galveston Student Housing - Operation Seawolf

About This Project Operation Seawolf Customer: Moss and Associates The Texas A&M at Galveston Student Housing project consist of 11,175 Cubic Yards of excavation (cut to fill) and 17,000 Cubic Yards of imported fill material.  This project is also made up of more than 300,000 square feet of lime stabilized sub-gradeRead more

2014-4-4 Aerials 1

ALDI Distribution Center

About This Project Customer: Graycor The ALDI food warehouse project consisting of excavation (98,000 cubic yard cut to fill) and backfill with import of over 165,000 cubic yards of select fill. The project also consist of crushed concrete base and lime stabilization. Project Timeline 18 Months Project PhotosRead more


Houston Country Club Parking Garage

About This Project Customer:  Pepper Lawson Construction. The Houston Country Club driving range project consist of demolition, excavation (119,000 cubic yards) and backfill (38,500 cubic yards) of underground garage and tunnel.  The project also consist of stabilization , limestone base, asphalt paving, storm sewer, sanitary sewer, water distribution and sub-drainage system.  ProjectRead more


Baker Hughes Joint Facility

About This Project Customer:   Benchmark Houston Builders Owner:         Baker Hughes The Project consists of new building facility in Corpus Christi, TX for Baker Hughes.  14,944 s.f. 1-story office building connected to the workshop, and new support and maintenance buildings including shop, warehouse, fueling, and containment areas. Project Timeline Project Timeline ProjectRead more


The Moran Building Project

About This Project Owner: Black and Black Realty of Texas Customer:  Spaw Maxwell The system shown above is a Storm Tech underground detention system that was installed on this particular job for the client.  The capacity for this system was 54,985 cubic feet detention volume provided in the storm tech system. Read more


Texas Chenier Complex Winnie Depot

About This Project Owner: US Fish and Wildlife Customer: C3, LLC.   This project is a design build (USGBC certified LEED Silver) Facility located on approximately 21.8 acres in Winnie, TX.  Multiple building pads were built for this project including all the flatwork preparation for this project.   25,000 tons of base materialRead more