A building having a foundation and abutting wall panels seated on the foundation. Together they define at least one wall section, tied together by orthogonal tensioners. The tensioners include vertical tensioners located parallel and between adjacent wall panels and fixed to the foundation and at a respective anchor positioned at the top of the adjacent wall panel. These vertical tensioners allow a binding of the adjacent wall panel by said vertical tensioner onto the seat of the foundation. The tensioners also a horizontal tensioner extending between said anchors at each end of the wall section to allow a horizontal binding of wall panels of the wall section together.