Calstone has serviced Northern California with high-quality concrete masonry and landscaping products for more than 60 years. ... Established in 1947 in San Carlos, Calstone has four facilities in operation, Gilroy, Galt, San Martin, and Tracy. Calstone currently services customers with over 600 varieties and sizes of concrete masonry, landscaping products, and custom made units meeting the specific needs of our clientele in both the retail trade and construction industries. At Calstone, we pride ourselves on our ability to constantly innovate new products to stay ahead in technological development. New equipment and new molds are frequently added, keeping ahead with improvements and design changes in the industry. If you are looking for a quality product, excellent service, competitive prices, and practical solutions to your creative ideas, look to Calstone read more