Established in 1987, Cowan & Thompson Construction is one of leading, full-service retaining wall contractors in California. It specializes in prep and detail and landscaping services for new home subdivisions. The company administers landscape and irrigation installation, as well as site maintenance programs. Cowan & Thompson Construction works on projects related to parking lots, frame and street sweeps, erosion control, drainage, private walks, steps and stoops, driveways and slide repairs. It provides installation of concrete masonry and garden and freestanding wall products from various manufacturers, including Keystone, New Castle, Venture, Allan Block and Cornerstone. In addition, the company operates a trucking division that offers on-site material delivery services. Cowan & Thompson Construction s clients feature Busby Builders, Christopherson Homes, Delco Builders, Lennar Communities, Pulte Homes, Toll Brothers and William Lyon Homes.