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Calstone paving stone driveway

About Us

Unbeatable Quality Since 1947

Calstone has serviced Northern California with high quality concrete masonry, paving stones, walls, outdoor structures and landscaping products for more than 65 years. Established in 1947 in San Carlos, Calstone has four manufacturing facilities in operation, Galt, Gilroy, San Martin, and Tracy. These centralized manufacturing locations enable us to provide services to much of the state, going as far north as Eureka, and far South as Fresno, and as far East as Reno on a regular basis.


Calstone currently services customers with over 600 varieties and sizes of concrete masonry, landscaping products, sacked products and custom-made units. We meet the specific needs of our clientele in the residential, commercial and construction industries, through professional contractor distribution channels. 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.

We are well prepared to meet the needs of all of our customers, serving equally the requirements of the retail industry, as well as residential, commercial, industrial, and institutional construction. The plants can operate 24 hours a day, and, to meet emergency circumstances, have the ability to deliver a cured Calstone product 24 hours after manufacture.

Deliveries are met through our own fleet of trucks or by our dealer's fleet of delivery and service. Support is accomplished through a select group of building products distributors, while technical assistance is provided to contractors and architects where needed. Management technical expertise is the result of industry-related associations, such as California Concrete Masonry Association (CMACN), National Concrete Masonry Association (NCMA), Interlocking Concrete Pavement Institue (ICPI), and a host of local organizations. Our effective customer relations policies stem from our family-run business ethic, spanning three generations. Calstone has highly qualified customer services and sales representatives that are on call to answer any questions you may have. Management is always readily available to answer any of your questions, one of the many distinct trademarks that has set our company apart from others throughout our 70 years plus history.

If you are looking for a quality product, excellent service, competitive prices, and practical solutions to your creative ideas, look to Calstone.

Calstone is a brand within the Oldcastle APG Portfolio. For more information on Oldcastle APG and its portfolio of brands, visit

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