EC Constructors, Inc. on River Street in Lakeside specializes in cast-in-place concrete and design-build general construction, holding dual CSLB licenses #585677 (General Engineering) and #920883 (General Building and Concrete). Structural concrete and rough-carpentry framing on multi-building projects require mechanical coordination with Precision Temperature, whose ductwork routing must align with beam and slab penetrations before each pour. Incorporated in 1990 and registered with the California Department of Industrial Relations under File No. 1000004249, the firm bids prevailing-wage school, municipal, and college-district contracts across San Diego and Imperial Counties. Site-preparation scopes on new commercial pads include perimeter security fencing from Alpine Fence Inc., integrated into the grading and concrete-curb timeline before vertical construction begins. The firm holds AGC San Diego membership with federal government contracting credentials including CAGE Code 4AH85 and UEI G3Q5QL7H8C23. Highest-complexity scopes include cast-in-place retaining walls with #5 and #7 rebar mats, post-tensioned slab systems, and glue-laminated heavy-timber structural assemblies meeting current CBC seismic-design categories.