About
We are Sigma Structural Inc., a structural engineering company based in Southern California and we help homeowners, architects, and contractors bring their projects to life with practical, dependable structural engineering solutions. Our team combines technical expertise with real-world construction insight to create structures that are safe, efficient, and built to last.
We handle projects of all sizes, including new homes, accessory dwelling units (ADUs), Senate Bill 9 developments, renovations, and retaining walls. Whether you’re planning an addition, strengthening an existing building, or starting from the ground up, we focus on clear communication, timely delivery, and thoughtful design that supports your goals.

