Structural nanomaterials, distinguished by their nanoscale dimensions and tailored properties, are revolutionizing engineering and construction industries by enhancing structural integrity, performance, and sustainability. These materials, such as carbon nanotubes, nanofibers, and nanocomposites, offer exceptional strength-to-weight ratios, high mechanical toughness, and improved durability compared to traditional materials. In construction, structural nanomaterials are used to develop lightweight and resilient building components, including concrete additives for enhanced strength and corrosion resistance. They also play a crucial role in aerospace, automotive, and marine applications, where lightweight materials are essential for improving fuel efficiency and reducing environmental impact. Challenges include scaling production, ensuring material uniformity, and integrating nanomaterials into existing manufacturing processes and safety standards. Ongoing research focuses on optimizing material properties, exploring sustainable production methods, and advancing nanoscale characterization techniques.