Postal Systems Contracting is a USPS-approved mailbox installer serving San Diego County—including Encinitas, Escondido, Carlsbad, Oceanside, San Marcos, Vista, Chula Vista, and La Mesa—as well as Orange County. We specialize in mailbox supply and installation for both residential and commercial properties, offering Cluster Box Units (CBUs), 4C recessed mailboxes, parcel lockers, secure multi-unit boxes, and full mailroom systems. We also handle repairs and upgrades, and we take care of the USPS approval process from start to finish. Whether you’re managing an apartment complex, HOA, or commercial site, we make mailbox installation simple, professional, and hassle-free.