CELST Corporation in Chula Vista provides civil engineering, land surveying, and construction management services from 471 Fourth Avenue, led by a principal holding a California Professional Engineer license. Grading plans, subdivision maps, and topographic surveys anchor the firm's scope, covering the earthwork and hardscape coordination that runs through material suppliers such as Southwest Boulder & Stone on large-parcel development projects. The Latino-owned firm's position on Fourth Avenue in downtown Chula Vista's 91910 ZIP code places it near the City's Development Services Department at 276 Fourth Avenue, streamlining in-person plan-check submittals. Subdivision engineering and tentative-map preparation support the residential development pipeline in eastern Chula Vista's Otay Ranch villages, where parcel sales flow through brokerages such as Peraza Real Estate & Associates. Final-map deliverables include ALTA/NSPS land-title surveys plotted at 1-inch-equals-40-feet scale with monumentation tied to the California Coordinate System, Zone 6, NAD83 datum.