Affinity Design Group, based in Irvine, CA, provides comprehensive architectural, civil, and structural engineering services throughout Southern California. We specialize in ADUs, room additions, seismic and wind retrofitting, new residential and commercial construction, and disaster recovery projects. Our experienced team delivers end-to-end solutions, including foundation and site investigations, precise field measurements, seismic and wind analyses using current industry standards, structural engineering calculations, and detailed construction drawings. We also offer 3D modeling to help clients clearly visualize their projects before construction begins. From document submittals to local building departments to thorough structural observation reports, we manage the process efficiently and professionally from start to finish. Known for our attention to detail, responsiveness, and commitment to quality, Affinity Design Group is a trusted partner for projects both large and small. Whether you’re a homeowner improving your living space or a commercial client seeking reliable engineering support, we tailor our services to meet your goals and deliver safe, durable, and well-designed results.

Website: affinitydg.com

Phone: (714) 215-7413

Cross Streets: Near the intersection of Placemark and Gillette Ave