Decoma Properties, LLC. Decoma Structural Industries, Inc.   Architecture  Mission District Lofts  Malaga Cove Travel  DECOMA Juko  NUWI Pacific Engineering  Little Tokyo  Northrop  Edison/El Rey  Idealab Construction  Inner City Arts  McDonnell Douglas  Pritikin Center  Mission District Lofts Company Information   One of Southern California’s leading firms in seismic retrofit engineering, DECOMA works with clients to structurally renovate buildings for seismic activity. DECOMA designs are sensitive to the aesthetic composition of existing structures and are non-invasive to the business operations of building occupants.