Robertson's Ready Mix, Ltd. ready-mix concrete plant in El Cajon, CA
El Cajon Plant 29 · serving El Cajon, CA 92020-1601 (San Diego County)
NRMCA-certified
Robertson's Ready Mix, Ltd. (El Cajon Plant 29) is an NRMCA-certified ready-mix concrete plant serving El Cajon, CA and nearby ZIP areas. Request a ready-mix concrete quote for your pour (concrete strength, approximate size, pour date, and notes like slump or site access) below.
Certification
NRMCA cert #32606
Listed as certified when last checked 2026-07-03 · expires 2026-08-17
Contact
(951) 493-6500
Location is ZIP-area approximate; confirm exact address with the plant.
Available strengths (PSI), slump, and admixtures aren't verified here. Tell us your spec and we'll confirm with the plant. Estimates only.
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Source: NRMCA Currently Certified Plants directory. Ready Mix Concrete is an independent directory of NRMCA-certified ready-mix concrete plants and is not affiliated with Robertson's Ready Mix, Ltd..