System and method for supporting, raising and lowering a modular structure

A building support system comprising:

• a plurality of caissons that extend below building grade to one or more of an engineered depth and a competent subsurface;
• a plurality of caisson caps, wherein each of the caissons is coupled to one of the plurality of caisson caps that sit atop a caisson, each caisson cap comprising,
• a top plate that includes multiple openings for pouring concrete for the caisson
• a lockout mechanism for locking the caisson to a structural steel member of a building module;
• a plurality of stabilizing tabs and blocks for mating with a structural steel member of a building module;
• a screw sleeve oriented in the center of the caisson cap for accommodating a screw jack that moves up and down substantially along a central axis of the caisson;
• and
• a screw jack bearing plate positioned a topmost point of the jack screw, wherein the plane of the screw (New) jack bearing plate is perpendicular to the central axis of the caisson;
• and
• a module bearing plate coupled to a structural steel member of a building module, wherein the screw jack bearing plate bears on the module bearing plate and supports and raises and lowers the building module when the screw is rotated.