Underground Utility Contractors Sonoma County

Santiago General Engineering installs underground utilities for residential, commercial, and public infrastructure projects. Services include water, sewer, and storm drain systems with all work performed to meet city, county, and utility agency requirements. The team handles main line installations and lateral connections with precision and care. Property owners and contractors rely on accurate trenching, proper backfill, and timely inspections. All work is coordinated with local agencies to ensure compliance and avoid delays. From planning to final hookup, every step is managed with a focus on quality and safety. The result is a utility system built to function reliably and meet long-term performance demands.