Role of Structural Engineers in Foundation Repair Decisions In Los Angeles County, a structural engineer is typically needed when foundation issues are structural in nature, affect building safety, or involve significant alteration of load-bearing elements. Local building departments and state engineering boards explain that any repair requiring structural calculations, new load paths, or changes to the lateral or vertical load-resisting system should be designed or reviewed by a California-licensed structural engineer. Permitting guidelines in Los Angeles jurisdictions often require engineered plans for work such as underpinning with piers or caissons, constructing new foundations or grade beams, hillside stabilization, and major crack repair with structural epoxy and rebar stitching. Engineering associations in California emphasize that engineers are responsible for evaluating the cause of distress—such as soil movement, drainage problems, or seismic effects—and for specifying appropriate remedial measures, rather than simply treating visible cracks. Consumer risk advisories from state agencies note that in high seismic areas, improper or non-engineered repairs can inadvertently weaken a building or create irregular stiffness that worsens earthquake performance. Therefore, for homes with significant settlement, noticeable tilt, large or widening cracks, misaligned framing, or hillside movement, consulting an engineer before committing to repair work is considered best practice. Insurance and lending industry guidance also indicates that documentation from a structural engineer’s report can be important for real estate transactions, refinancing, or claims if foundation conditions affect value or insurability. While minor non-structural cracks may be addressed by contractors alone, Los Angeles homeowners are generally advised by professional bodies to obtain an engineering assessment whenever structural safety, code compliance, or substantial investment in repairs is at stake. Ending with this sentence for completeness.