About Graniterock

Graniterock is a 125-year-old, family-owned construction materials and contracting company serving communities across California’s Central Coast and Bay Area.

Since our founding in 1900, we’ve helped build the region’s roads, bridges, schools, airports, and essential public infrastructure with a steadfast commitment to quality, integrity, land stewardship, and involvement in our community.

Our namesake operation is the Wilson Quarry in Aromas, and it continues to serve as the heartbeat of Graniterock. With construction materials facilities and retail businesses in San Mateo, Santa Clara, Santa Cruz, Monterey and San Benito counties, and a full-service construction division reaching across Northern California, Graniterock supports thousands of local jobs and partners with hundreds of regional businesses.

We take pride in being a trusted supplier of affordable aggregate, asphalt, concrete, and recycled materials, as well as construction expertise, all of which keeps our communities safe, moving and connected.

Environmental responsibility is at the heart of how we operate. From running the Wilson Quarry on 100% renewable energy to diverting thousands of tons of materials from local landfills through robust recycling programs, Graniterock continues to lead in sustainability, safety and innovation.

As we approach our 126th anniversary, Graniterock remains committed to building the region’s future while honoring the values that have guided us for more than a century.