Contact Modern Builders Supply

Modern Builders Supply

825 Grand Avenue

San Marcos, CA 92078

Phone: 760-591-4570

Hours:

Mon - Fri: 7 am - 5 pm

Sat: 7 am - 1 pm

Sun: Closed

We will be closed for the Thanksgiving Holiday Thursday, November 28th through Sunday, December 1st. We will reopen Monday, December 2nd.

WE WILL BE CLOSED FOR INVENTORY AT 3PM FRIDAY, DECEMBER 6TH THROUGH SUNDAY, DECEMBER 8TH. REOPENING ON MONDAY, DECEMBER 9TH.