Hardened Structures Hardened Shelters LLC, is a professional construction program management firm specializing in commercial/institutional and governmental hardening, fortified homes, bomb shelters, storm shelters, bunkers and self-sustaining hardened facilities for individual, corporate and government clients. Our Multi-Hazard Engineering, design build methodology encompasses blast hardening, blast effect mitigation and protective design technologies addressing the full range of conventional, nuclear, biological and chemical weapons protection. Our team or architects, engineers, project managers, security specialists and scientists manage all aspects of: strategic planning, site assessment, risk assessment, architectural planning, engineering design, building systems placement, preparedness/response, alternative/solar energy systems, bidding, construction and client move-in. A Hardened Structure Home/Facility or a Hardened Shelter Addition to your current home can be built in almost any location be it urban, suburban or rural.