Since 1993, REC Consultants has delivered civil engineering, water resources, and land surveying out of 2970 Fifth Avenue in Hillcrest, covering grading plans, erosion control, sewer main extensions, and feasibility studies across Southern California land-development projects. Staff civil engineers produce tentative maps, improvement plans, and hydrology reports that Calderon Builders Inc relies on when assembling entitlement packages for residential and commercial sites. A dedicated water-resources group handles BMP integration, low-impact development design, and storm-drain hydraulics for projects navigating California's Regional Water Quality Control Board permitting process. Surveying staff perform boundary, topographic, and ALTA work feeding into construction documents that SD Build Co uses for grading and site-prep sequencing. Expert-witness testimony and litigation support round out the firm's land-use offerings for disputed entitlement cases. The most complex engagements are full master-planned community packages combining civil design, hydrology modeling, biological analysis, GIS services, and multi-agency permitting across a single coordinated entitlement.