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About Us

Our story begins in 1952 when Modern Block, a concrete block manufacturing company located in Oceanside, California, was formed. In the early 1990s, Partners Bill Gibney and Ray Raub joined together and formed Modern Builders Supply. Soon after they were joined by their third partner Jim Thompson.

As our name suggests, Modern Builders has the most popular and fashionable masonry materials and building supplies in San Diego County. Our knowledgeable sales staff will assist you no matter what project you’re undertaking. Our goal is to assist you throughout the entire process with the service that equals the quality of the premium products we carry. Whatever it takes. We have tons of it.

Located in San Marcos, California, Modern Builders Supply specializes in brick, block, stone, slate and retaining wall products. We have a wide variety of construction materials and specialized products from prominent manufacturers and suppliers to satisfy your creative building needs.

Modern Builders Supply
825 Grand Avenue
San Marcos, CA 92078
Mon - Fri: 7 am - 5 pm
Sat: 7 am - 1 pm
Sun: Closed
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