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.
Our mission is to help homeowners and architects bring their visions to life while maintaining a clear focus on safety, structural integrity, budget, and timeliness. We believe that great design is realized through collaboration, and we are committed to supporting every stage of construction with technical guidance and clear communication.
Throughout the building process, we work closely with contractors to ensure that our structural plans are executed accurately and efficiently. With over 50 completed projects, including a mix of new construction, ADUs, Senate Bill 9 developments, renovations, and retaining walls, Sigma Structural Inc. continues to be a trusted partner in shaping Southern California’s built environment.
To Sigma Structural INC., every project is unique and is unlike any project we have built or remodeled before. We operate with a tailor-made approach, with you, our valued customer, at the helm. Your project will receive our full attention, from start to finish. Our guiding principle is to give full respect to our customers’ needs, requests and their own specific recommendations.
We guarantee you an enjoyable, efficient, and successful remodeling or rebuilding experience, started on time, completed on time, and according to your budgetary needs.
Real reviews from architects, contractors, and homeowners we've worked with across Southern California. Read every word our clients have shared on Google about partnering with Sigma Structural Inc.
