EL deco is a FAMILY-OWNED electrical and instrumentation contractor. For over 30 years. It has excelled in electrical and instrumentation construction in the industrial. Commercial. Institutional and retail markets. EL deco S design build teams are made UP of diverse members WHO come together to collaborate and manage the complex work of the design and construction process. Architects. Engineers. General contractors and subcontractors work together to manage the critical process of a single construction project. AT the same time. The design build team is under increased pressure to reduce risk. Control costs and compress project schedules.