A high strength, lightweight building structure comprising a high-strength connection to a foundation, high-strength eaves, and high-strength structural panels. The fiber reinforced, high-strength structural panels form the walls, ceiling, roof, soffit, and eave of the structure. The panels comprise a rigid foam core having outer membrane layer, panel spacers, and sheeting. The high-strength foundation connection comprises a continuous seam plate with bonding agents, mechanical fasteners, and a metal bearing cap having continuously spaced, angle-shaped anchor studs welded to the metal bearing cap. The high-strength eave structure, comprise of a soffit panel connected to an inclined eave panel, a connection bracket and a rigid wedge continuously bonded between the ceiling panel and roof panel, thus forming a sealed, non-vented attic space.