Retail strip centers, detached single shops, tenant improvements, cellular site – building retrofits, garages, gas and store centers Complete building design takes a lot of time and effort, not to mention knowledge. At DRP Enterprises LLC, we are highly skilled in all aspects of commercial structural engineering. From planning for retail strip centers, detached single shops, tenant improvements, to building retrofits, we have the experienced staff to accommodate any design needs that are necessary to get your project off the ground.