San Diego, CA With over 50 locations across the U.S., we're equipped to help you nearly anywhere, with any job. Use the interactive map to view our location-specific products and services, or connect with a subsidiary branch.

About This Location

The San Diego branch serves all of San Diego County providing wholesale construction materials for mechanical, commercial, industrial, and marine insulating. We also offer the full line of 3M fire stopping and interior finishing products such as FRP from Crane Composites.


  • San Diego County Delivery
  • Weekly Intercompany Restocking
  • Flatbed Delivery to Job Sites
  • Full-Service City Desk
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San Diego, CA

9040 Activity Rd
Unit E
San Diego, CA 92126-4473
Local: 858-225-4555
Fax: 858-225-4554
Branch Manager
Kara Rodriguez
Branch Hours
6:00AM to 4:00PM (PST)

The Macarthur Advantage

For over 100 years MacArthur Co. has been in the building products distribution business. Our footprint has expanded over the many years as well as our product offering.  We are proud to serve many industries including; HVAC, Mechanical Insulation, OEM, Fire Proofing, Low Slope Roofing, Steep Slope Roofing, Siding, Windows, Waterproofing… just to name a few.  MacArthur Co. works closely with our customers to ensure product availability through our many stocking warehouses and timely deliveries through our fleet of trucks.

MacArthur Co. is also very proud to be 100% ESOP Employee Owned! Whether you are speaking to one of our experienced salespeople, estimators, corporate employees or truck drivers, you are truly speaking with an owner who cares about our partnership with you, our customer!  We pride ourselves on the long-term relationships we’ve earned with our vendors and customers throughout the years. Contact your closest MacArthur. Co branch office and see for yourself what the ‘MacArthur Difference’ is all about.

Every MacArthur Company location strives to meet the unique needs of their customers.