From Plans To Permits To perfection. Since 2016, San Diego-based S3DA Design has been providing structural and MEP design services to a wide range of clients and projects. From the beginning, the vision of our founders was to provide innovative, cost-effective engineering solutions with excellence in quality of service and client satisfaction. As structural engineers, we collaborate with architects, developers, and builders to achieve innovative structural designs using the latest methods of construction, materials, and technology. Our portfolio represents a full range of markets that include but are not limited to Residential ( single-family - Multi-family ), Commercial education, retail, healthcare, mixed-use, and so on. S3DA Design can provide services on a local, regional, and national basis. The simple key to our success has been to provide professional quality services on time and on budget. Our primary focus is in the residential, commercial and industrial market sectors.