Welcome to Capitol Steel Company, your steel and building materials supplier for nearly 45 years! Founded in 1968, we have a wide variety of products to support many areas of the construction industry. Our products range from roofing supplies and reinforcing steel to concrete construction supplies and building systems. Today, our building materials are used in a variety of building applications and sectors such as: commercial, residential, industrial, light commercial and agricultural markets. With our easy-access location, right off of Business 80 in Sacramento, we are able to provide the prompt and knowledgeable service that our long-time customers have come to expect. Our delivery team delivers top quality building supplies and materials to our customers throughout much of Northern California. Learn more about Capitol Steel Company, our excellent customer service, wealth of knowledge and high-quality building products throughout this site!